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| | Agpat3 | 1-acyl-sn-glycerol-3-phosphate acyltransferase gamma; Converts 1-acyl-sn-glycerol-3-phosphate (lysophosphatidic acid or LPA) into 1,2-diacyl-sn-glycerol-3-phosphate (phosphatidic acid or PA) by incorporating an acyl moiety at the sn-2 position of the glycerol backbone. Acts on LPA containing saturated or unsaturated fatty acids C16:0-C20:4 at the sn-1 position using C18:1, C20:4 or C18:2-CoA as the acyl donor (By similarity). Also acts on lysophosphatidylcholine, lysophosphatidylinositol and lysophosphatidylserine using C18:1 or C20:4-CoA (By similarity). Has a preference for arachidon [...] (376 aa) |
| | Ace | Angiotensin-converting enzyme, soluble form; Converts angiotensin I to angiotensin II by release of the terminal His-Leu, this results in an increase of the vasoconstrictor activity of angiotensin. Also able to inactivate bradykinin, a potent vasodilator. Has also a glycosidase activity which releases GPI- anchored proteins from the membrane by cleaving the mannose linkage in the GPI moiety. This GPIase activity seems to be crucial for the egg- binding ability of the sperm; Belongs to the peptidase M2 family. (1312 aa) |
| | Clgn | Calmegin; Functions during spermatogenesis as a chaperone for a range of client proteins that are important for sperm adhesion onto the egg zona pellucida and for subsequent penetration of the zona pellucida. Required for normal sperm migration from the uterus into the oviduct. Required for normal male fertility. Binds calcium ions. Belongs to the calreticulin family. (611 aa) |
| | Prkaca | cAMP-dependent protein kinase catalytic subunit alpha; Phosphorylates a large number of substrates in the cytoplasm and the nucleus. Regulates the abundance of compartmentalized pools of its regulatory subunits through phosphorylation of PJA2 which binds and ubiquitinates these subunits, leading to their subsequent proteolysis. Phosphorylates CDC25B, ABL1, NFKB1, CLDN3, PSMC5/RPT6, PJA2, RYR2, RORA and VASP. RORA is activated by phosphorylation. Required for glucose- mediated adipogenic differentiation increase and osteogenic differentiation inhibition from osteoblasts. Involved in the [...] (351 aa) |
| | Cfap97d1 | Uncharacterized protein CFAP97D1; Belongs to the CFAP97 family. (164 aa) |
| | Ldhc | L-lactate dehydrogenase C chain; Possible role in sperm motility; Belongs to the LDH/MDH superfamily. LDH family. (332 aa) |
| | Csf1 | Processed macrophage colony-stimulating factor 1; Cytokine that plays an essential role in the regulation of survival, proliferation and differentiation of hematopoietic precursor cells, especially mononuclear phagocytes, such as macrophages and monocytes. Promotes the release of proinflammatory chemokines, and thereby plays an important role in innate immunity and in inflammatory processes. Plays an important role in the regulation of osteoclast proliferation and differentiation, the regulation of bone resorption, and is required for normal bone development. Required for normal male a [...] (552 aa) |
| | Calr3 | Calreticulin-3; CALR3 capacity for calcium-binding may be absent or much lower than that of CALR (By similarity). During spermatogenesis, may act as a lectin-independent chaperone for specific client proteins such as ADAM3. Required for sperm fertility. (380 aa) |
| | Gopc | Golgi-associated PDZ and coiled-coil motif-containing protein; Plays a role in intracellular protein trafficking and degradation. May regulate CFTR chloride currents and acid-induced ASIC3 currents by modulating cell surface expression of both channels. May also regulate the intracellular trafficking of the ADR1B receptor. May play a role in autophagy. Overexpression results in CFTR intracellular retention and degradation in the lysosomes. (455 aa) |
| | Ros1 | Proto-oncogene tyrosine-protein kinase ROS; Orphan receptor tyrosine kinase (RTK) that plays a role in epithelial cell differentiation and regionalization of the proximal epididymal epithelium. May activate several downstream signaling pathways related to cell differentiation, proliferation, growth and survival including the PI3 kinase-mTOR signaling pathway. Mediates the phosphorylation of PTPN11, an activator of this pathway. May also phosphorylate and activate the transcription factor STAT3 to control anchorage-independent cell growth. Mediates the phosphorylation and the activation [...] (2340 aa) |
| | Tysnd1 | Peroxisomal leader peptide-processing protease, 10 kDa form; Peroxisomal protease that mediates both the removal of the leader peptide from proteins containing a PTS2 target sequence and processes several PTS1-containing proteins. Catalyzes the processing of PTS1-proteins involved in the peroxisomal beta-oxidation of fatty acids (By similarity); Belongs to the peptidase S1B family. (568 aa) |
| | Pcsk4 | Proprotein convertase subtilisin/kexin type 4; Proprotein convertase involved in the processing of hormone and other protein precursors at sites comprised of pairs of basic amino acid residues. In males, important for ADAM2 processing as well as other acrosomal proteins with roles in fertilization and critical for normal fertilization events such as sperm capacitation, acrosome reaction and binding of sperm to zona pellucida. Plays also a role in female fertility, involved in the regulation of trophoblast migration and placental development, may be through the proteolytical processing [...] (655 aa) |
| | Atp8b3 | Phospholipid-transporting ATPase IK; P4-ATPase flippase which catalyzes the hydrolysis of ATP coupled to the transport of aminophospholipids from the outer to the inner leaflet of various membranes and ensures the maintenance of asymmetric distribution of phospholipids. Phospholipid translocation seems also to be implicated in vesicle formation and in uptake of lipid signaling molecules. May be responsible for the maintenance of asymmetric distribution of phosphatidylserine (PS) in spermatozoa membranes. Involved in acrosome reactions and binding of spermatozoa to zona pellucida; Belon [...] (1335 aa) |
| | Hexb | Beta-hexosaminidase subunit beta; Responsible for the degradation of GM2 gangliosides, and a variety of other molecules containing terminal N-acetyl hexosamines, in the brain and other tissues. (536 aa) |
| | Adam2 | Disintegrin and metalloproteinase domain-containing protein 2; Sperm surface membrane protein that may be involved in sperm- egg plasma membrane adhesion and fusion during fertilization. Could have a direct role in sperm-zona binding or migration of sperm from the uterus into the oviduct. Interactions with egg membrane could be mediated via binding between its disintegrin-like domain to one or more integrins receptors on the egg. This is a non catalytic metalloprotease-like protein (By similarity). (735 aa) |
| | Adam7 | Disintegrin and metalloproteinase domain-containing protein 7; May play an important role in male reproduction including sperm maturation and gonadotrope function. This is a non catalytic metalloprotease-like protein. (789 aa) |
| | Prss21 | Testisin; Could regulate proteolytic events associated with testicular germ cell maturation; Belongs to the peptidase S1 family. (324 aa) |
| | Npc1 | NPC intracellular cholesterol transporter 1; Intracellular cholesterol transporter which acts in concert with NPC2 and plays an important role in the egress of cholesterol from the endosomal/lysosomal compartment. Unesterified cholesterol that has been released from LDLs in the lumen of the late endosomes/lysosomes is transferred by NPC2 to the cholesterol-binding pocket in the N-terminal domain of NPC1. Cholesterol binds to NPC1 with the hydroxyl group buried in the binding pocket (By similarity). May play a role in vesicular trafficking in glia, a process that may be crucial for main [...] (1277 aa) |
| | Pip5k1b | Phosphatidylinositol 4-phosphate 5-kinase type-1 beta; Participates in the biosynthesis of phosphatidylinositol 4,5- bisphosphate. Mediates RAC1-dependent reorganization of actin filaments. Contributes to the activation of PLD2. Together with PIP5K1A is required after stimulation of G-protein coupled receptors for stable platelet adhesion. (539 aa) |
| | Taldo1 | Transaldolase; Transaldolase is important for the balance of metabolites in the pentose-phosphate pathway. (337 aa) |
| | Tgm4 | Protein-glutamine gamma-glutamyltransferase 4; Associated with the mammalian reproductive process. Plays an important role in the formation of the seminal coagulum through the cross-linking of specific proteins present in the seminal plasma. Transglutaminase is also required to stabilize the copulatory plug. (670 aa) |
| | Plcd4 | 1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase delta-4; Hydrolyzes the phosphatidylinositol 4,5-bisphosphate (PIP2) to generate 2 second messenger molecules diacylglycerol (DAG) and inositol 1,4,5-trisphosphate (IP3). DAG mediates the activation of protein kinase C (PKC), while IP3 releases Ca(2+) from intracellular stores. Required for acrosome reaction in sperm during fertilization, probably by acting as an important enzyme for intracellular Ca(2+) mobilization in the zona pellucida-induced acrosome reaction. May play a role in cell growth. Modulates the liver regeneration [...] (807 aa) |
| | Cyct | Cytochrome c, testis-specific; Electron carrier protein. The oxidized form of the cytochrome c heme group can accept an electron from the heme group of the cytochrome c1 subunit of cytochrome reductase. Cytochrome c then transfers this electron to the cytochrome oxidase complex, the final protein carrier in the mitochondrial electron-transport chain. (105 aa) |
| | Patl2 | Protein PAT1 homolog 2; RNA-binding protein that acts as a translational repressor. (529 aa) |
| | Cst3 | Cystatin-C; As an inhibitor of cysteine proteinases, this protein is thought to serve an important physiological role as a local regulator of this enzyme activity; Belongs to the cystatin family. (140 aa) |
| | Ptx3 | Pentraxin-related protein PTX3; Plays a role in the regulation of innate resistance to pathogens, inflammatory reactions, possibly clearance of self- components and female fertility. (381 aa) |
| | Glrb | Glycine receptor subunit beta; Glycine receptors are ligand-gated chloride channels. GLRB does not form ligand-gated ion channels by itself, but is part of heteromeric ligand-gated chloride channels. Channel opening is triggered by extracellular glycine. Heteropentameric channels composed of GLRB and GLRA1 are activated by lower glycine levels than homopentameric GLRA1. Plays an important role in the down- regulation of neuronal excitability. Contributes to the generation of inhibitory postsynaptic currents. (496 aa) |
| | Ambp | Inter-alpha-trypsin inhibitor light chain; Inter-alpha-trypsin inhibitor inhibits trypsin, plasmin, and lysosomal granulocytic elastase. Inhibits calcium oxalate crystallization (By similarity); In the N-terminal section; belongs to the calycin superfamily. Lipocalin family. (349 aa) |
| | B4galt1 | Processed beta-1,4-galactosyltransferase 1; The Golgi complex form catalyzes the production of lactose in the lactating mammary gland and could also be responsible for the synthesis of complex-type N-linked oligosaccharides in many glycoproteins as well as the carbohydrate moieties of glycolipids; Belongs to the glycosyltransferase 7 family. (399 aa) |
| | Gba2 | Non-lysosomal glucosylceramidase; Non-lysosomal glucosylceramidase that catalyzes the hydrolysis of glucosylceramide (GlcCer) to free glucose and ceramide. Glucosylceramides are membrane glycosphingolipids that have a wide intracellular distribution. They are the main precursors of more complex glycosphingolipids that play a role in cellular growth, differentiation, adhesion, signaling, cytoskeletal dynamics and membrane properties. Also involved in the transglucosylation of cholesterol, transferring glucose from glucosylceramides, thereby modifying its water solubility and biological [...] (918 aa) |
| | Eqtn | Equatorin; Acrosomal membrane-anchored protein involved in the process of fertilization and in acrosome biogenesis. (337 aa) |
| | Nos3 | Nitric oxide synthase, endothelial; Produces nitric oxide (NO) which is implicated in vascular smooth muscle relaxation through a cGMP-mediated signal transduction pathway. NO mediates vascular endothelial growth factor (VEGF)-induced angiogenesis in coronary vessels and promotes blood clotting through the activation of platelets. May play a significant role in normal and abnormal limb development; Belongs to the NOS family. (1202 aa) |
| | Golga3 | Golgin subfamily A member 3; Plays an important role in spermatogenesis and/or testis development. Probably identical with the serologically detectable male antigen (SDM). Probably involved in maintaining Golgi structure. (1487 aa) |
| | Llcfc1 | LLLL and CFNLAS motif-containing protein 1. (108 aa) |
| | Trpv6 | Transient receptor potential cation channel subfamily V member 6; Calcium selective cation channel that mediates Ca(2+) uptake in various tissues, including the intestine. Important for normal Ca(2+) ion homeostasis in the body, including bone and skin. The channel is activated by low internal calcium level, probably including intracellular calcium store depletion, and the current exhibits an inward rectification. Inactivation includes both a rapid Ca(2+)- dependent and a slower Ca(2+)-calmodulin-dependent mechanism; the latter may be regulated by phosphorylation. In vitro, is slowly i [...] (767 aa) |
| | Prss37 | Probable inactive serine protease 37; Plays a role in male fertility. May have a role in sperm migration or binding to zona-intact eggs. Involved in the activation of the proacrosin/acrosin system (By similarity). (237 aa) |
| | Figla | Factor in the germline alpha; Germ-line specific transcription factor implicated in postnatal oocyte-specific gene expression. Plays a key regulatory role in the expression of multiple oocyte-specific genes, including those that initiate folliculogenesis and those that encode the zona pellucida (ZP1, ZP2 and ZP3) required for fertilization and early embryonic survival. Essential for oocytes to survive and form primordial follicles. The persistence of FIGLA in adult females suggests that it may regulate additional pathways that are essential for normal ovarian development. Binds to the [...] (194 aa) |
| | Plcz1 | 1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase zeta-1; The production of the second messenger molecules diacylglycerol (DAG) and inositol 1,4,5-trisphosphate (IP3) is mediated by activated phosphatidylinositol-specific phospholipase C enzymes. In vitro, hydrolyzes PtdIns(4,5)P2 in a Ca(2+)-dependent manner. Triggers intracellular Ca(2+) oscillations in oocytes solely during M phase and is involved in inducing oocyte activation and initiating embryonic development up to the blastocyst stage. Is therefore a strong candidate for the egg-activating soluble sperm factor that is t [...] (647 aa) |
| | Cd9 | CD9 antigen; Integral membrane protein associated with integrins, which regulates different processes, such as sperm-egg fusion, platelet activation and aggregation, and cell adhesion. Present at the cell surface of oocytes and plays a key role in sperm-egg fusion, possibly by organizing multiprotein complexes and the morphology of the membrane required for the fusion. In myoblasts, associates with CD81 and PTGFRN and inhibits myotube fusion during muscle regeneration. In macrophages, associates with CD9 and beta-1 and beta-2 integrins, and prevents macrophage fusion into multinucleate [...] (226 aa) |
| | Fkbp4 | Peptidyl-prolyl cis-trans isomerase FKBP4, N-terminally processed; Immunophilin protein with PPIase and co-chaperone activities. Component of steroid receptors heterocomplexes through interaction with heat-shock protein 90 (HSP90). May play a role in the intracellular trafficking of heterooligomeric forms of steroid hormone receptors between cytoplasm and nuclear compartments. The isomerase activity controls neuronal growth cones via regulation of TRPC1 channel opening. Acts also as a regulator of microtubule dynamics by inhibiting MAPT/TAU ability to promote microtubule assembly. May [...] (458 aa) |
| | Mfge8 | Lactadherin; Contributes to phagocytic removal of apoptotic cells in many tissues. Specific ligand for the alpha-v/beta-3 and alpha-v/beta-5 receptors. Also binds to phosphatidylserine-enriched cell surfaces in a receptor-independent manner. Zona pellucida-binding protein which may play a role in gamete interaction (By similarity). Plays an important role in the maintenance of intestinal epithelial homeostasis and the promotion of mucosal healing. Promotes VEGF-dependent neovascularization. (463 aa) |
| | Dkkl1 | Dickkopf-like protein 1; Involved in fertilization by facilitating sperm penetration of the zona pellucida. May promote spermatocyte apoptosis, thereby limiting sperm production. In adults, may reduce testosterone synthesis in Leydig cells. Is not essential either for development or fertility. (230 aa) |
| | Izumo1 | Izumo sperm-egg fusion protein 1; Essential sperm cell-surface protein required for fertilization by acting as a ligand for IZUMO1R/JUNO receptor on egg. The IZUMO1:IZUMO1R/JUNO interaction is a necessary adhesion event between sperm and egg that is required for fertilization but is not sufficient for cell fusion. The ligand-receptor interaction probably does not act as a membrane 'fusogen'. (397 aa) |
| | Adam3 | A disintegrin and metallopeptidase domain 3; Involved in fertilization by controlling sperm migration into oviduct. (822 aa) |
| | Izumo1r | Sperm-egg fusion protein Juno; Receptor for IZUMO1 present at the cell surface of oocytes (oolemma), which is essential for species-specific gamete recognition and fertilization. The IZUMO1:IZUMO1R/JUNO interaction is a necessary adhesion event between sperm and egg that is required for fertilization but is not sufficient for cell fusion. The ligand-receptor interaction probably does not act as a membrane 'fusogen'. Does not bind folate. (244 aa) |
| | Usp2 | Ubiquitin carboxyl-terminal hydrolase 2; Hydrolase that deubiquitinates polyubiquitinated target proteins such as MDM2, MDM4 and CCND1 (By similarity). Isoform 1 and isoform 2 possess both ubiquitin-specific peptidase and isopeptidase activities (By similarity). Deubiquitinates MDM2 without reversing MDM2-mediated p53/TP53 ubiquitination and thus indirectly promotes p53/TP53 degradation and limits p53 activity (By similarity). Has no deubiquitinase activity against p53/TP53 (By similarity). Prevents MDM2-mediated degradation of MDM4 (By similarity). Plays a role in the G1/S cell-cycle [...] (619 aa) |
| | Ptgs2 | Prostaglandin G/H synthase 2; Converts arachidonate to prostaglandin H2 (PGH2), a committed step in prostanoid synthesis. Constitutively expressed in some tissues in physiological conditions, such as the endothelium, kidney and brain, and in pathological conditions, such as in cancer. PTGS2 is responsible for production of inflammatory prostaglandins. Up-regulation of PTGS2 is also associated with increased cell adhesion, phenotypic changes, resistance to apoptosis and tumor angiogenesis. In cancer cells, PTGS2 is a key step in the production of prostaglandin E2 (PGE2), which plays imp [...] (604 aa) |
| | Sec23ip | SEC23-interacting protein; Plays a role in the organization of endoplasmic reticulum exit sites. Specifically binds to phosphatidylinositol 3-phosphate (PI(3)P), phosphatidylinositol 4-phosphate (PI(4)P) and phosphatidylinositol 5-phosphate (PI(5)P). (998 aa) |
| | Smap2 | Stromal membrane-associated protein 2; GTPase activating protein that acts on ARF1. Can also activate ARF6 (in vitro). May play a role in clathrin-dependent retrograde transport from early endosomes to the trans-Golgi network. (428 aa) |
| | Apob | Apolipoprotein B-100; Apolipoprotein B is a major protein constituent of chylomicrons (apo B-48), LDL (apo B-100) and VLDL (apo B-100). Apo B- 100 functions as a recognition signal for the cellular binding and internalization of LDL particles by the apoB/E receptor. (4505 aa) |
| | Parp11 | Protein mono-ADP-ribosyltransferase PARP11; Mono-ADP-ribosyltransferase that mediates mono-ADP- ribosylation of target proteins (By similarity). Plays a role in nuclear envelope stability and nuclear remodeling during spermiogenesis. (331 aa) |
| | Catsper2 | Cation channel sperm-associated protein 2; Voltage-gated calcium channel that plays a central role in sperm cell hyperactivation. Controls calcium entry to mediate the hyperactivated motility, a step needed for sperm motility which is essential late in the preparation of sperm for fertilization. Activated by intracellular alkalinization. (588 aa) |
| | Spem1 | Spermatid maturation protein 1; Required for proper cytoplasm removal during spermatogenesis. (310 aa) |
| | Kdm3b | Lysine-specific demethylase 3B; Histone demethylase that specifically demethylates 'Lys-9' of histone H3, thereby playing a central role in histone code. Demethylation of Lys residue generates formaldehyde and succinate May have tumor suppressor activity (By similarity). (1762 aa) |
| | Ptger2 | Prostaglandin E2 receptor EP2 subtype; Receptor for prostaglandin E2 (PGE2). The activity of this receptor is mediated by G(s) proteins that stimulate adenylate cyclase. The subsequent raise in intracellular cAMP is responsible for the relaxing effect of this receptor on smooth muscle; Belongs to the G-protein coupled receptor 1 family. (362 aa) |
| | Cplx1 | Complexin-1; Positively regulates a late step in exocytosis of various cytoplasmic vesicles, such as synaptic vesicles and other secretory vesicles. Organizes the SNAREs into a cross-linked zigzag topology that, when interposed between the vesicle and plasma membranes, is incompatible with fusion, thereby preventing SNAREs from releasing neurotransmitters until an action potential arrives at the synapse. Also involved in glucose-induced secretion of insulin by pancreatic beta-cells. Essential for motor behavior ; Belongs to the complexin/synaphin family. (134 aa) |
| | Cbfa2t2 | Protein CBFA2T2; Transcriptional corepressor which facilitates transcriptional repression via its association with DNA-binding transcription factors and recruitment of other corepressors and histone-modifying enzymes. Via association with PRDM14 is involved in regulation of embryonic stem cell (ESC) pluripotency. Involved in primordial germ cell (PCG) formation. Stabilizes PRDM14 and OCT4 on chromatin in a homooligomerization-dependent mannerCan repress the expression of MMP7 in a ZBTB33-dependent manner (By similarity). Through heteromerization with CBFA2T3/MTG16 may be involved in re [...] (594 aa) |
| | Nlrp2 | NLR family, pyrin domain-containing 2. (1046 aa) |
| | Catsper1 | Cation channel sperm-associated protein 1; Voltage-gated calcium channel that plays a central role in sperm cell hyperactivation. Controls calcium entry to mediate the hyperactivated motility, a step needed for sperm motility which is essential late in the preparation of sperm for fertilization. Activated by intracellular alkalinization. Belongs to the cation channel sperm-associated (TC 1.A.1.19) family. (686 aa) |
| | Lrrc52 | Leucine-rich repeat-containing protein 52; Auxiliary protein of the large-conductance, voltage and calcium-activated potassium channel (BK alpha). Modulates gating properties by producing a marked shift in the BK channel's voltage dependence of activation in the hyperpolarizing direction, and in the absence of calcium (By similarity). KCNU1 channel auxiliary protein. May modulate KCNU1 gating properties, shifting KCNU1 gating to more negative potentials at a given pH. (314 aa) |
| | Ttll5 | Tubulin polyglutamylase TTLL5; Polyglutamylase which preferentially modifies alpha-tubulin. Involved in the side-chain initiation step of the polyglutamylation reaction rather than in the elongation step. Required for CCSAP localization to both spindle and cilia microtubules (By similarity). Increases the effects of NCOA2 in glucocorticoid receptor-mediated repression and induction and in androgen receptor-mediated induction (By similarity). Belongs to the tubulin--tyrosine ligase family. (1328 aa) |
| | Cftr | Cystic fibrosis transmembrane conductance regulator; Epithelial ion channel that plays an important role in the regulation of epithelial ion and water transport and fluid homeostasis. Mediates the transport of chloride ions across the cell membrane. Channel activity is coupled to ATP hydrolysis. The ion channel is also permeable to HCO(3-); selectivity depends on the extracellular chloride concentration. Exerts its function also by modulating the activity of other ion channels and transporters. Contributes to the regulation of the pH and the ion content of the epithelial fluid layer. M [...] (1476 aa) |
| | 4930451I11Rik | RIKEN cDNA 4930451I11 gene. (111 aa) |
| | Gk2 | Glycerol kinase 2; Key enzyme in the regulation of glycerol uptake and metabolism; Belongs to the FGGY kinase family. (554 aa) |
| | Csl | Citrate synthase; Belongs to the citrate synthase family. (466 aa) |
| | Ly6k | Lymphocyte antigen 6K; Required for sperm migration into the oviduct and male fertility by controlling binding of sperm to zona pellucida. May play a role in cell growth (By similarity). (154 aa) |
| | Ar | Androgen receptor; Steroid hormone receptors are ligand-activated transcription factors that regulate eukaryotic gene expression and affect cellular proliferation and differentiation in target tissues. Transcription factor activity is modulated by bound coactivator and corepressor proteins like ZBTB7A that recruits NCOR1 and NCOR2 to the androgen response elements/ARE on target genes, negatively regulating androgen receptor signaling and androgen-induced cell proliferation. Transcription activation is also down-regulated by NR0B2. Activated, but not phosphorylated, by HIPK3 and ZIPK/DA [...] (899 aa) |
| | Tnp2 | Nuclear transition protein 2; Plays a key role in the replacement of histones to protamine in the elongating spermatids of mammals. In condensing spermatids, loaded onto the nucleosomes, where it promotes the recruitment and processing of protamines, which are responsible for histone eviction. The histone H2AB1-H2BC1/TH2B dimer is required for loading of TNP2 onto chromatin. Belongs to the nuclear transition protein 2 family. (117 aa) |
| | Spata2 | Spermatogenesis-associated protein 2; Bridging factor that mediates the recruitment of CYLD to the LUBAC complex, thereby regulating TNF-alpha-induced necroptosis (By similarity). Acts as a direct binding intermediate that bridges RNF31/HOIP, the catalytic subunit of the LUBAC complex, and the deubiquitinase (CYLD), thereby recruiting CYLD to the TNF-R1 signaling complex (TNF-RSC) (By similarity). Required to activate the 'Met- 1'- (linear) and 'Lys-63'-linked deubiquitinase activities of CYLD. Controls the kinase activity of RIPK1 and TNF-alpha- induced necroptosis by promoting 'Met-1 [...] (515 aa) |
| | Spesp1 | Sperm equatorial segment protein 1; Involved in fertilization ability of sperm. (399 aa) |
| | Efcab9 | EF-hand calcium-binding domain-containing protein 9; pH-dependent Ca(2+) sensor required to activate the CatSper channel, a complex involved in sperm cell hyperactivation. Sperm cell hyperactivation is needed for sperm motility which is essential late in the preparation of sperm for fertilization. Associates with the CatSper complex via direct interaction with CATSPERZ, and senses intracellular Ca(2+). Together with CATSPERZ, associates with the CatSper channel pore and is required for the two-row structure of each single CatSper channel. (216 aa) |
| | Spata46 | Spermatogenesis-associated protein 46; Plays a role in spermiogenesis and fertilization. (204 aa) |
| | Arhgdia | Rho GDP-dissociation inhibitor 1; Controls Rho proteins homeostasis. Regulates the GDP/GTP exchange reaction of the Rho proteins by inhibiting the dissociation of GDP from them, and the subsequent binding of GTP to them. Retains Rho proteins such as CDC42, RAC1 and RHOA in an inactive cytosolic pool, regulating their stability and protecting them from degradation. Actively involved in the recycling and distribution of activated Rho GTPases in the cell, mediates extraction from membranes of both inactive and activated molecules due its exceptionally high affinity for prenylated forms. T [...] (204 aa) |
| | Osbp2 | Oxysterol-binding protein 2; Binds 7-ketocholesterol; Belongs to the OSBP family. (908 aa) |
| | Pla2g3 | Phospholipase A2, group III. (504 aa) |
| | Tnfaip6 | Tumor necrosis factor-inducible gene 6 protein; Possibly involved in cell-cell and cell-matrix interactions during inflammation and tumorigenesis. (275 aa) |
| | Nectin2 | Nectin-2; Modulator of T-cell signaling. Can be either a costimulator of T-cell function, or a coinhibitor, depending on the receptor it binds to. Upon binding to CD226, stimulates T-cell proliferation and cytokine production, including that of IL2, IL5, IL10, IL13, and IFNG. Upon interaction with PVRIG, inhibits T-cell proliferation. These interactions are competitive. Probable cell adhesion protein. (530 aa) |
| | Glra1 | Glycine receptor subunit alpha-1; Glycine receptors are ligand-gated chloride channels. Channel opening is triggered by extracellular glycine. Channel opening is also triggered by taurine and beta-alanine (By similarity). Channel characteristics depend on the subunit composition; heteropentameric channels are activated by lower glycine levels and display faster desensitization (By similarity). Plays an important role in the down-regulation of neuronal excitability. Contributes to the generation of inhibitory postsynaptic currents. Channel activity is potentiated by ethanol. Potentiatio [...] (457 aa) |
| | Tpte | Transmembrane phosphatase with tensin homology. (664 aa) |
| | Tex101 | Testis-expressed protein 101; Plays a role in fertilization by controlling binding of sperm to zona pellucida and migration of spermatozoa into the oviduct probably through molecule adhesion ADAM3. May play a role in signal transduction and promote protein tyrosine phosphorylation (By similarity). (250 aa) |
| | Ppp3cc | Serine/threonine-protein phosphatase 2B catalytic subunit gamma isoform; Calcium-dependent, calmodulin-stimulated protein phosphatase which plays an essential role in the transduction of intracellular Ca(2+)-mediated signals. Dephosphorylates and activates transcription factor NFATC1. Dephosphorylates and inactivates transcription factor ELK1. Dephosphorylates DARPP32. (513 aa) |
| | Nphp4 | Nephrocystin-4; Involved in the organization of apical junctions; the function is proposed to implicate a NPHP1-4-8 module. Does not seem to be strictly required for ciliogenesis (By similarity). Required for building functional cilia. Involved in the organization of the subapical actin network in multiciliated epithelial cells. Seems to recruit INT to basal bodies of motile cilia which subsequently interacts with actin-modifying proteins such as DAAM1 (By similarity). In cooperation with INVS may downregulate the canonical Wnt pathway and promote the Wnt-PCP pathway by regulating expr [...] (1425 aa) |
| | Odf1 | Outer dense fiber protein 1; Component of the outer dense fibers (ODF) of spermatozoa. ODF are filamentous structures located on the outside of the axoneme in the midpiece and principal piece of the mammalian sperm tail and may help to maintain the passive elastic structures and elastic recoil of the sperm tail. (248 aa) |
| | Iqcf1 | IQ domain-containing protein F1; Involved in sperm capacitation and acrosome reaction. (182 aa) |
| | Acrbp | Acrosin-binding protein; May be involved in packaging and condensation of the acrosin zymogen in the acrosomal matrix via its association with proacrosin. (540 aa) |
| | Ccdc87 | Coiled-coil domain-containing protein 87; Plays a role in spermatogenesis, where it is important for normal sperm head morphology. Also required for the acrosome reaction and thus normal male fertility; Belongs to the CCDC87 family. (855 aa) |
| | Prss55 | Serine protease 55; Probable serine protease; Belongs to the peptidase S1 family. (321 aa) |
| | Gm128 | Protein MENT; Involved in control of cellular proliferation. Onconcogenic modifier contributing to the tumor suppressor function of DNMT3B. (350 aa) |
| | Prnp | Major prion protein; Its primary physiological function is unclear. May play a role in neuronal development and synaptic plasticity. May be required for neuronal myelin sheath maintenance. May promote myelin homeostasis through acting as an agonist for ADGRG6 receptor. May play a role in iron uptake and iron homeostasis. Soluble oligomers are toxic to cultured neuroblastoma cells and induce apoptosis (in vitro) (By similarity). Association with GPC1 (via its heparan sulfate chains) targets PRNP to lipid rafts. Also provides Cu(2+) or ZN(2+) for the ascorbate-mediated GPC1 deaminase deg [...] (254 aa) |
| | Slc22a14 | Solute carrier family 22 (Organic cation transporter), member 14. (629 aa) |
| | Inpp5b | Type II inositol 1,4,5-trisphosphate 5-phosphatase; Hydrolyzes phosphatidylinositol 4,5-bisphosphate (PtIns(4,5)P2) and the signaling molecule phosphatidylinositol 1,4,5- trisphosphate (PtIns(1,4,5)P3), and thereby modulates cellular signaling events. (993 aa) |
| | Ccnyl1 | Cyclin Y-like 1. (291 aa) |
| | Grid2 | Glutamate receptor ionotropic, delta-2; Receptor for glutamate. L-glutamate acts as an excitatory neurotransmitter at many synapses in the central nervous system. The postsynaptic actions of Glu are mediated by a variety of receptors that are named according to their selective agonists. Promotes synaptogenesis and mediates the D-Serine-dependent long term depression signals and AMPA receptor endocytosis of cerebellar parallel fiber- Purkinje cell (PF-PC) synapses through the beta-NRX1-CBLN1-GRID2 triad complex. (1007 aa) |
| | Ccdc136 | Coiled-coil domain-containing protein 136; May play a role in acrosome formation in spermatogenesis and in fertilization. (1187 aa) |
| | Cstf2t | Cleavage stimulation factor subunit 2 tau variant; May play a significant role in AAUAAA-independent mRNA polyadenylation in germ cells. Directly involved in the binding to pre- mRNAs. (632 aa) |
| | Tmprss12 | Transmembrane protease serine 12. (336 aa) |
| | Gpx4 | Phospholipid hydroperoxide glutathione peroxidase; Essential antioxidant peroxidase that directly reduces phospholipid hydroperoxide even if they are incorporated in membranes and lipoproteins. Can also reduce fatty acid hydroperoxide, cholesterol hydroperoxide and thymine hydroperoxide (By similarity). Plays a key role in protecting cells from oxidative damage by preventing membrane lipid peroxidation. Required to prevent cells from ferroptosis, a non-apoptotic cell death resulting from an iron-dependent accumulation of lipid reactive oxygen species. The presence of selenocysteine (Se [...] (253 aa) |
| | Kcnu1 | Potassium channel subfamily U member 1; Testis-specific potassium channel activated by both intracellular pH and membrane voltage that mediates export of K(+). Represents the primary spermatozoan K(+) current. In contrast to KCNMA1/SLO1, it is not activated by Ca(2+) or Mg(2+). Critical for fertility. May play an important role in sperm osmoregulation required for the acquisition of normal morphology and motility when faced with osmotic challenges, such as those experienced after mixing with seminal fluid and entry into the vagina. Belongs to the potassium channel family. Calcium-activ [...] (1121 aa) |
| | Smcp | Sperm mitochondrial-associated cysteine-rich protein; Involved in sperm motility. Its absence is associated with genetic background dependent male infertility. Infertility may be due to reduced sperm motility in the female reproductive tract and inability to penetrate the oocyte zona pellucida. (143 aa) |
| | Pabpc1l | Polyadenylate-binding protein; Binds the poly(A) tail of mRNA. Belongs to the polyadenylate-binding protein type-1 family. (607 aa) |
| | Brwd1 | Bromodomain and WD repeat-containing protein 1; May be a transcriptional activator. May be involved in chromatin remodeling. Plays a role in the regulation of cell morphology and cytoskeletal organization. Required in the control of cell shape. (2304 aa) |
| | Adam1a | Disintegrin and metalloproteinase domain-containing protein 1a; May be involved in sperm-egg fusion. (791 aa) |
| | Reep6 | Receptor expression-enhancing protein 6; Required for correct function and survival of retinal photoreceptors. Required for retinal development. In rod photoreceptors, facilitates stability and/or trafficking of guanylate cyclases and is required to maintain endoplasmic reticulum and mitochondrial homeostasis. May play a role in clathrin-coated intracellular vesicle trafficking of proteins from the endoplasmic reticulum to the retinal rod plasma membrane. (201 aa) |
| | Esr1 | Estrogen receptor; Nuclear hormone receptor. The steroid hormones and their receptors are involved in the regulation of eukaryotic gene expression and affect cellular proliferation and differentiation in target tissues. Ligand-dependent nuclear transactivation involves either direct homodimer binding to a palindromic estrogen response element (ERE) sequence or association with other DNA-binding transcription factors, such as AP-1/c-Jun, c-Fos, ATF-2, Sp1 and Sp3, to mediate ERE- independent signaling. Ligand binding induces a conformational change allowing subsequent or combinatorial a [...] (599 aa) |
| | Pithd1 | PITH domain-containing protein 1; Promotes megakaryocyte differentiation by up-regulating RUNX1 expression. Regulates RUNX1 expression by activating the proximal promoter of the RUNX1 gene and by enhancing the translation activity of an internal ribosome entry site (IRES) element in the RUNX1 gene (By similarity). (211 aa) |
| | Ovch2 | Ovochymase-2; Belongs to the peptidase S1 family. (609 aa) |
| | Pip5k1a | Phosphatidylinositol 4-phosphate 5-kinase type-1 alpha; Catalyzes the phosphorylation of phosphatidylinositol 4- phosphate (PtdIns4P) to form phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P2). PtdIns(4,5)P2 is involved in a variety of cellular processes and is the substrate to form phosphatidylinositol 3,4,5- trisphosphate (PtdIns(3,4,5)P3), another second messenger. The majority of PtdIns(4,5)P2 is thought to occur via type I phosphatidylinositol 4- phosphate 5-kinases given the abundance of PtdIns4P. Participates in a variety of cellular processes such as actin cytoskeleton organ [...] (547 aa) |
| | Pltp | Phospholipid transfer protein; Facilitates the transfer of a spectrum of different lipid molecules, including diacylglycerol, phosphatidic acid, sphingomyelin, phosphatidylcholine, phosphatidylglycerol, cerebroside and phosphatidyl ethanolamine. Essential for the transfer of excess surface lipids from triglyceride-rich lipoproteins to HDL, thereby facilitating the formation of smaller lipoprotein remnants, contributing to the formation of LDL, and assisting in the maturation of HDL particles. PLTP also plays a key role in the uptake of cholesterol from peripheral cells and tissues that [...] (493 aa) |
| | Prnd | Prion-like protein doppel; Required for normal acrosome reaction and for normal male fertility. Can bind Cu(2+) (By similarity). (179 aa) |
| | B230118H07Rik | Protein C11orf74 homolog; Seems to play a role in ciliary BBSome localization, maybe through interaction with IFT-A complex. (244 aa) |
| | Atp1a4 | Sodium/potassium-transporting ATPase subunit alpha-4; This is the catalytic component of the active enzyme, which catalyzes the hydrolysis of ATP coupled with the exchange of sodium and potassium ions across the plasma membrane. This action creates the electrochemical gradient of sodium and potassium ions, providing the energy for active transport of various nutrients. Plays a role in sperm motility (By similarity); Belongs to the cation transport ATPase (P-type) (TC 3.A.3) family. Type IIC subfamily. (1032 aa) |
| | Piga | N-acetylglucosaminyl-phosphatidylinositol biosynthetic protein; Necessary for the synthesis of N-acetylglucosaminyl- phosphatidylinositol, the very early intermediate in GPI-anchor biosynthesis; Belongs to the glycosyltransferase group 1 family. Glycosyltransferase 4 subfamily. (485 aa) |
| | Ephb6 | Ephrin type-B receptor 6; Kinase-defective receptor for members of the ephrin-B family. Binds to ephrin-B1 and ephrin-B2. Modulates cell adhesion and migration by exerting both positive and negative effects upon stimulation with ephrin-B2. Inhibits JNK activation, T-cell receptor-induced IL-2 secretion and CD25 expression upon stimulation with ephrin-B2 (By similarity). (1014 aa) |
| | Slc26a8 | Testis anion transporter 1; Acts as a DIDS-sensitive anion exchanger mediating chloride, sulfate and oxalate transport. May fulfill critical anion exchange functions in male germ line during meiosis and hence may play a role in spermatogenesis. May be involved in a new regulatory pathway linking sulfate transport to RhoGTPase signaling in male germ cells. A critical component of the sperm annulus that is essential for correct sperm tail differentiation and motility and hence male fertility. May form a molecular complex involved in the regulation of chloride and bicarbonate ions fluxes [...] (999 aa) |
| | Crisp4 | Cysteine-rich secretory protein 4; Belongs to the CRISP family. (293 aa) |
| | Ahr | Aryl hydrocarbon receptor; Ligand-activated transcriptional activator. Binds to the XRE promoter region of genes it activates. Activates the expression of multiple phase I and II xenobiotic chemical metabolizing enzyme genes (such as the CYP1A1 gene). Mediates biochemical and toxic effects of halogenated aromatic hydrocarbons. Involved in cell-cycle regulation. Likely to play an important role in the development and maturation of many tissues. Regulates the circadian clock by inhibiting the basal and circadian expression of the core circadian component PER1. Inhibits PER1 by repressing [...] (805 aa) |
| | Best1 | Bestrophin-1; Forms calcium-sensitive chloride channels. Permeable to bicarbonate (By similarity); Belongs to the bestrophin family. (551 aa) |
| | Zan | Zonadhesin; Binds in a species-specific manner to the zona pellucida of the egg. May be involved in gamete recognition and/or signaling. (5420 aa) |
| | Adad1 | Adenosine deaminase domain-containing protein 1; Plays a role in spermatogenesis. Binds to RNA but not to DNA. (619 aa) |
| | Adcy3 | Adenylate cyclase type 3; Catalyzes the formation of the signaling molecule cAMP in response to G-protein signaling. Participates in signaling cascades triggered by odorant receptors via its function in cAMP biosynthesis. Required for the perception of odorants. Required for normal sperm motility and normal male fertility. Plays a role in regulating insulin levels and body fat accumulation in response to a high fat diet. (1145 aa) |
| | Wipf3 | WAS/WASL-interacting protein family member 3; May be a regulator of cytoskeletal organization (Potential). May have a role in spermatogenesis. (483 aa) |
| | Ndc1 | Nucleoporin NDC1; Component of the nuclear pore complex (NPC), which plays a key role in de novo assembly and insertion of NPC in the nuclear envelope. Required for NPC and nuclear envelope assembly, possibly by forming a link between the nuclear envelope membrane and soluble nucleoporins, thereby anchoring the NPC in the membrane (By similarity); Belongs to the NDC1 family. (673 aa) |
| | H1f7 | Testis-specific H1 histone; Essential for normal spermatogenesis and male fertility. Required for proper cell restructuring and DNA condensation during the elongation phase of spermiogenesis. Involved in the histone-protamine transition of sperm chromatin and the subsequent production of functional sperm. Binds both double-stranded and single-stranded DNA, ATP and protamine-1. (398 aa) |
| | Rimbp3 | RIMS-binding protein 3; Component of the manchette, a microtubule-based structure which plays a key role in sperm head morphogenesis during late stages of sperm development. Important for male fertility ; Belongs to the RIMBP family. (1606 aa) |
| | Spaca6 | Sperm acrosome membrane-associated protein 6; Sperm protein potentially involved sperm-egg fusion. (339 aa) |
| | Nell2 | Protein kinase C-binding protein NELL2; Required for neuron survival through the modulation of MAPK pathways (By similarity). Involved in the regulation of hypothalamic GNRH secretion and the control of puberty (By similarity). (819 aa) |
| | Mmel1 | Membrane metallo-endopeptidase-like 1, soluble form; Metalloprotease involved in sperm function, possibly by modulating the processes of fertilization and early embryonic development. Degrades a broad variety of small peptides with a preference for peptides shorter than 3 kDa containing neutral bulky aliphatic or aromatic amino acid residues. Shares the same substrate specificity with MME and cleaves peptides at the same amide bond. Belongs to the peptidase M13 family. (766 aa) |
| | Tmem95 | Transmembrane protein 95. (176 aa) |
| | Agfg1 | Arf-GAP domain and FG repeat-containing protein 1; Required for vesicle docking or fusion during acrosome biogenesis. May play a role in RNA trafficking or localization. (559 aa) |
| | Oaz3 | Ornithine decarboxylase antizyme 3; Ornithine decarboxylase (ODC) antizyme protein that negatively regulates ODC activity and intracellular polyamine biosynthesis and uptake in response to increased intracellular polyamine levels. Binds to ODC monomers, inhibiting the assembly of the functional ODC homodimers. Does not target the ODC monomers for degradation, which allows a protein synthesis-independent restoration of ODC activity. Stabilizes AZIN2 by interfering with its ubiquitination. Involved in the translocation of AZNI2 from ER-Golgi intermediate compartment (ERGIC) to the cytoso [...] (243 aa) |
| | Spam1 | Hyaluronidase PH-20; Involved in sperm-egg adhesion. Upon fertilization sperm must first penetrate a layer of cumulus cells that surrounds the egg before reaching the zona pellucida. The cumulus cells are embedded in a matrix containing hyaluronic acid which is formed prior to ovulation. This protein aids in penetrating the layer of cumulus cells by digesting hyaluronic acid. (512 aa) |
| | Pmis2 | Transmembrane protein PMIS2; May play a role in spermatozoa mobility. Belongs to the CD225/Dispanin family. (96 aa) |
| | Fetub | Fetuin-B; Protease inhibitor required for egg fertilization. Required to prevent premature zona pellucida hardening before fertilization, probably by inhibiting the protease activity of ASTL, a protease that mediates the cleavage of ZP2 and triggers zona pellucida hardening. Belongs to the fetuin family. (388 aa) |
| | Fst | Follistatin; Binds directly to activin and functions as an activin antagonist. Specific inhibitor of the biosynthesis and secretion of pituitary follicle stimulating hormone (FSH). (343 aa) |
| | Crisp2 | Cysteine-rich secretory protein 2; May regulate some ion channels' activity and therebye regulate calcium fluxes during sperm capacitation. Belongs to the CRISP family. (243 aa) |
