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PKS1 | Protein PHYTOCHROME KINASE SUBSTRATE 1; May be responsible for light-regulated cytoplasmic sequestration of phytochromes or may be a negative regulator of phytochrome B signaling. Component of the network that modulates the very low-fluence response (VLFR) branch of phyA signaling. Acts positively in PHOT1 signaling. Regulates phytochrome-mediated photomorphogenesis and hypocotyl phototropism. Involved in the control of leaf flattening and leaf positioning. Promotes negative root phototropism and negatively regulates root gravitropism. May act by controlling auxin homeostasis. Belongs [...] (439 aa) | ||||
LAF3 | Protein LONG AFTER FAR-RED 3; Required for phyA-controlled responses to continuous far-red light (FRc) conditions, including the inhibition of hypocotyl elongation and the regulation of XTH15/XTR7 expression. Belongs to the metallo-dependent hydrolases superfamily. (583 aa) | ||||
FHL | Protein FAR-RED-ELONGATED HYPOCOTYL 1-LIKE; Can activate transcription (By similarity). Essential for light-regulated PHYA nuclear accumulation and subsequent PHYA phototropic signaling processes. PHYA-specific signal transducer in response to continuous FR lights. Mediates the association of PHYA with HFR1 and LAF1 in the nucleus in response to FR conditions. Contributes to inhibition of hypocotyl elongation in continuous blue light (B). Belongs to the FHY1 protein family. (201 aa) | ||||
PTAC12 | Protein PLASTID TRANSCRIPTIONALLY ACTIVE 12, chloroplastic; Involved in plastid gene expression. Required in the nucleus for the initiation of photomorphogenesis mediated by phytochromes (PHYs) (e.g. PHYA and PHYB) by mediating PHYs localization to photobodies, especially in response to red and far-red light, and implicating phytochrome nuclear bodies as sites of proteolysis for PHYs and PIFs proteins (e.g. PIF1 and PIF3). Acts downstream of PHYs and upstream of DET1. (527 aa) | ||||
COI1 | Coronatine-insensitive protein 1; Required for jasmonate-regulated plant fertility and defense processes, and for coronatine and/or other elicitors perceptions/responses. Seems to not be required for meiosis. Required for the regulation of some genes induced by wounding, but not for all. Component of SCF(COI1) E3 ubiquitin ligase complexes, which may mediate the ubiquitination and subsequent proteasomal degradation of target proteins (probably including the ribulose bisphosphate carboxylase small chain 1B RBCS-1B and the histone deacetylase HDA6). These SCF complexes play crucial roles [...] (592 aa) | ||||
AGO1 | Protein argonaute 1; Involved in RNA-mediated post-transcriptional gene silencing (PTGS). Main component of the RNA-induced silencing complex (RISC) that binds to a short guide RNA such as microRNA (miRNA) or small interfering RNA (siRNA). RISC uses the mature miRNA or siRNA as a guide for slicer-directed cleavage of homologous mRNAs to repress gene expression. Requires DRB1 for directional loading of the small RNA duplex (guide stand and passenger strand) onto RISC for passenger strand degradation. Unlike animal RISC that associates in high molecular weight complex, Arabidopsis RISC i [...] (1048 aa) | ||||
HY5 | Transcription factor HY5; Transcription factor that promotes photomorphogenesis in light. Acts downstream of the light receptor network and directly affects transcription of light-induced genes. Specifically involved in the blue light specific pathway, suggesting that it participates in transmission of cryptochromes (CRY1 and CRY2) signals to downstream responses. In darkness, its degradation prevents the activation of light-induced genes (Probable). Acts coordinately with SPL7 to regulate the microRNA miR408 and its target genes in response to changes in light and copper conditions. R [...] (168 aa) | ||||
RFI2 | E3 ubiquitin-protein ligase RFI2; Mediates phytochrome (phyA and phyB)-controlled seedling deetiolation responses such as hypocotyl elongation in response to red and far-red light. Required for light-induced expression of LHCB3 and CHALCONE SYNTHASE (CHS). Regulates negatively CONSTANS (CO) and FLOWERING LOCUS T (FT) expression and photoperiodic flowering. (358 aa) | ||||
COL13 | Zinc finger protein CONSTANS-LIKE 13. (332 aa) | ||||
PHYA | Phytochrome A; Regulatory photoreceptor which exists in two forms that are reversibly interconvertible by light: the Pr form that absorbs maximally in the red region of the spectrum and the Pfr form that absorbs maximally in the far-red region. Photoconversion of Pr to Pfr induces an array of morphogenetic responses, whereas reconversion of Pfr to Pr cancels the induction of those responses. Pfr controls the expression of a number of nuclear genes including those encoding the small subunit of ribulose-bisphosphate carboxylase, chlorophyll A/B binding protein, protochlorophyllide reduct [...] (1122 aa) | ||||
HAT4 | Homeobox-leucine zipper protein HAT4; Probable transcription factor involved in the negative regulation of cell elongation and specific cell proliferation processes such as lateral root formation and secondary growth of the vascular system. Acts as mediator of the red/far-red light effects on leaf cell expansion in the shading response. Binds to the DNA sequence 5'- CAAT[GC]ATTG-3'. Negatively regulates its own expression. Belongs to the HD-ZIP homeobox family. Class II subfamily. (284 aa) | ||||
ELIP1 | Early light-induced protein 1, chloroplastic; Prevents excess accumulation of free chlorophyll by inhibiting the entire chlorophyll biosynthesis pathway (e.g. 5- aminolevulinate synthesis and Mg-protoporphyrin IX chelatase activity), and hence prevent photooxidative stress (By similarity). Probably involved in the integration of pigments into the mature light- harvesting pigment-protein complexes. Light-harvesting chlorophyll (LHC) a/b-binding protein required to ensure a high rate of chlorophyll accumulation during deetiolation in continuous high light. Involved in seed germination. M [...] (195 aa) | ||||
LHCB2.2 | Chlorophyll a-b binding protein 2.2, chloroplastic; The light-harvesting complex (LHC) functions as a light receptor, it captures and delivers excitation energy to photosystems with which it is closely associated (By similarity). Mediates rapid phosphorylation and migration of LHCII-PSII to photosystem I (PSI) after transition to state 2 (red) light conditions, thus leading to the formation of PSI-PSII-LHCII and PSI-LHCII supercomplex to balance the relative excitation of PSI and PSII. Involved in the production of reactive oxygen species (ROS) and stomatal closure upon abscisic acid ( [...] (265 aa) | ||||
LAF1 | Transcription factor LAF1; Transcription factor that promotes photomorphogenesis in the light by participating in the transmission of phytochrome A (phyA) signals to downstream responses. Probably acts by activating expression of light-induced genes. In darkness, its degradation prevents the activation of light-induced genes. (283 aa) | ||||
OXS3 | Oxidative stress 3. (172 aa) | ||||
RUP1 | WD repeat-containing protein RUP1; Functions in association with RUP2 as repressor of UV-B- induced photomorphogenesis mediated by UVR8 and HY5. Plays a crucial negative feedback regulatory role downstream of UVR8-COP1 to inhibit UVR8 function, balance UV-B-specific responses and ensure normal plant growth. Is involved in the regulation of photoperiodic flowering and vegetative development. (385 aa) | ||||
ATHB-4 | Homeobox-leucine zipper protein ATHB-4; Probable transcription factor; Belongs to the HD-ZIP homeobox family. Class II subfamily. (318 aa) | ||||
PHYB | Phytochrome B; Regulatory photoreceptor which exists in two forms that are reversibly interconvertible by light: the Pr form that absorbs maximally in the red region of the spectrum and the Pfr form that absorbs maximally in the far-red region. Photoconversion of Pr to Pfr induces an array of morphogenetic responses, whereas reconversion of Pfr to Pr cancels the induction of those responses. Pfr controls the expression of a number of nuclear genes including those encoding the small subunit of ribulose-bisphosphate carboxylase, chlorophyll A/B binding protein, protochlorophyllide reduct [...] (1172 aa) | ||||
GAI | DELLA protein GAI; Transcriptional regulator that acts as a repressor of the gibberellin (GA) signaling pathway. Transcription coactivator of the zinc finger transcription factors GAF1/IDD2 and ENY/IDD1 in regulation of gibberellin homeostasis and signaling. No effect of the BOI proteins on its stability. Probably acts by participating in large multiprotein complexes that repress transcription of GA-inducible genes. Positively regulates XERICO expression. In contrast to RGA, it is less sensitive to GA. Its activity is probably regulated by other phytohormones such as auxin and ethylene [...] (533 aa) | ||||
FAR1-2 | Protein FAR-RED IMPAIRED RESPONSE 1; Transcription activator that recognizes and binds to the DNA consensus sequence 5'-CACGCGC-3'. Activates the expression of FHY1 and FHL involved in light responses. Positive regulator of chlorophyll biosynthesis via the activation of HEMB1 gene expression. (827 aa) | ||||
SAUR25 | SAUR-AC-like protein (Small auxin up RNA). (92 aa) | ||||
GI | Protein GIGANTEA; Involved in regulation of circadian rhythm and photoperiodic flowering. May play a role in maintenance of circadian amplitude and period length. Is involved in phytochrome B signaling. Stabilizes ADO3 and the circadian photoreceptor ADO1/ZTL. Regulates 'CONSTANS' (CO) in the long-day flowering pathway by modulating the ADO3-dependent protein stability of CDF1 and CDF2, but is not essential to activate CO transcription. Regulates, via the microRNA miR172, a CO-independent pathway that promotes photoperiodic flowering by inducing 'FLOWERING LOCUS T'. (1173 aa) | ||||
RGA | DELLA protein RGA; Probable transcriptional regulator that acts as a repressor of the gibberellin (GA) signaling pathway. Probably acts by participating in large multiprotein complexes that repress transcription of GA-inducible genes. Positively regulates XERICO expression in seeds. Upon GA application, it is degraded by the proteasome, allowing the GA signaling pathway. Compared to other DELLA proteins, it is the most sensitive to GA application. No effect of the BOI proteins on its stability. Its activity is probably regulated by other phytohormones such as auxin and ethylene, attenu [...] (587 aa) | ||||
BLH1 | BEL1-like homeodomain protein 1; Belongs to the TALE/BELL homeobox family. (680 aa) | ||||
LHCB2.1 | Chlorophyll a-b binding protein 2.1, chloroplastic; The light-harvesting complex (LHC) functions as a light receptor, it captures and delivers excitation energy to photosystems with which it is closely associated (By similarity). Mediates rapid phosphorylation and migration of LHCII-PSII to photosystem I (PSI) after transition to state 2 (red) light conditions, thus leading to the formation of PSI-PSII-LHCII and PSI-LHCII supercomplex to balance the relative excitation of PSI and PSII. Involved in the production of reactive oxygen species (ROS) and stomatal closure upon abscisic acid ( [...] (265 aa) | ||||
SIGE | RNA polymerase sigma factor sigE, chloroplastic/mitochondrial; Essential protein. Sigma factors are initiation factors that promote the attachment of plastid-encoded RNA polymerase (PEP) to specific initiation sites (e.g. psbA and psbD) and are then released. Essential for blue light-mediated transcription of psbD, which encodes the photosystem II reaction center protein D2. Plays a role in reproduction. Required during female gametophyte development. (517 aa) | ||||
LHCB2.4 | Chlorophyll a-b binding protein 2.4, chloroplastic; The light-harvesting complex (LHC) functions as a light receptor, it captures and delivers excitation energy to photosystems with which it is closely associated (By similarity). Mediates rapid phosphorylation and migration of LHCII-PSII to photosystem I (PSI) after transition to state 2 (red) light conditions, thus leading to the formation of PSI-PSII-LHCII and PSI-LHCII supercomplex to balance the relative excitation of PSI and PSII. Involved in the production of reactive oxygen species (ROS) and stomatal closure upon abscisic acid ( [...] (266 aa) | ||||
ABCI21 | ABC transporter I family member 21; Belongs to the ABC transporter superfamily. ABCI family. (282 aa) | ||||
SPA1 | Protein SUPPRESSOR OF PHYA-105 1; Controls normal photoperiodic flowering and regulates circadian rhythms. Required for suppression of photomorphogenesis in dark-grown seedlings and for normal elongation growth of adult plants. Integral component of the COP1/SPA E3 ubiquitin-protein ligase complex. Involved in HY5, HFR1, LAF1 and CO degradation. (1029 aa) | ||||
ABCB19 | ABC transporter B family member 19; Auxin efflux transporter that acts as a negative regulator of light signaling to promote hypocotyl elongation. Mediates the accumulation of chlorophyll and anthocyanin, as well as the expression of genes in response to light. Participates in auxin efflux and thus regulates the polar auxin basipetal transport (from auxin-producing leaves to auxin-sensitive tissues, and from root tips to root elongating zone). Involved in diverse auxin-mediated responses including gravitropism, phototropism and lateral root formation. (1252 aa) | ||||
FHY3 | Protein FAR-RED ELONGATED HYPOCOTYL 3; Transcription activator that recognizes and binds to the DNA consensus sequence 5'-CACGCGC-3'. Activates the expression of FHY1 and FHL involved in light responses. When associated with PHYA, protects it from being recognized and degraded by the COP1/SPA complex. Positive regulator of chlorophyll biosynthesis via the activation of HEMB1 gene expression. Belongs to the FHY3/FAR1 family. (839 aa) | ||||
PIA2 | Phytochrome-interacting ankyrin-repeat protein 2; Promotes anthocyanin accumulation through interaction with PHYA, especially in response to far-red light, high light and sucrose treatment, probably by triggering A3G2XYLT/UF3GT expression. Required for gametophytes development as well as male-female gamete recognition during fertilization, possibly by regulating mitochondrial gene expression. Represses PHYA-mediated PIF3 phosphorylation. (174 aa) | ||||
GRF7-2 | Growth-regulating factor 7; Transcription activator that plays a role in the regulation of cell expansion in leaf and cotyledons tissues. Component of a network formed by miR396, the GRFs and their interacting factors (GIFs) acting in the regulation of meristem function, at least partially through the control of cell proliferation. (365 aa) | ||||
HFR1 | Transcription factor HFR1; Atypical bHLH transcription factor that regulates photomorphogenesis through modulation of phytochrome (e.g. PHYA) and cryptochrome signalings (Ref.4,. Suppresses the transcriptional regulation activity of PIF4 by forming non-DNA-binding heterodimer. (292 aa) | ||||
ACT2 | Actin-2; Actins are highly conserved proteins that are involved in various types of cell motility and are ubiquitously expressed in all eukaryotic cells. Essential component of cell cytoskeleton; plays an important role in cytoplasmic streaming, cell shape determination, cell division, organelle movement and extension growth. This is considered as one of the vegetative actins. (377 aa) | ||||
ELIP2 | Early light-induced protein 2, chloroplastic; Probably involved in the integration of pigments into the mature light-harvesting pigment-protein complexes. Light-harvesting chlorophyll (LHC) a/b-binding protein required to ensure a high rate of chlorophyll accumulation during deetiolation in continuous high light. Involved in seed germination. May fulfill a photoprotective functions. Prevents excess accumulation of free chlorophyll by inhibiting the entire chlorophyll biosynthesis pathway (e.g. 5-aminolevulinate synthesis and Mg-protoporphyrin IX chelatase activity), and hence prevent p [...] (193 aa) | ||||
IAA29 | Auxin-responsive protein IAA29; Aux/IAA proteins are short-lived transcriptional factors that function as repressors of early auxin response genes at low auxin concentrations. Repression is thought to result from the interaction with auxin response factors (ARFs), proteins that bind to the auxin- responsive promoter element (AuxRE). Formation of heterodimers with ARF proteins may alter their ability to modulate early auxin response genes expression. (251 aa) | ||||
HYH | Transcription factor HY5-like; Transcription factor that promotes photomorphogenesis in light. Acts downstream of the light receptor network and directly affects transcription of light-induced genes. Specifically involved in the blue light specific pathway, suggesting that it participates in transmission of cryptochromes (CRY1 and CRY2) signals to downstream responses. In darkness, its degradation prevents the activation of light-induced genes; Belongs to the bZIP family. (149 aa) | ||||
FHY1-2 | Protein FAR-RED ELONGATED HYPOCOTYL 1; Key regulator of far red / red (FR/R) spectrum-specific responses essential for the adaption to changing light conditions (e.g. de-etiolation), essentially by regulating PHYA shuttling from the cytoplasm to the nucleus and by directly regulating the expression of some target genes, depending on light conditions and phosphorylation status. Binds chromatin at target genes promoters, especially in FR light conditions. Can activate transcription of different genes, some being in a phytochrome A (PHYA)- dependent and other in a PHYA-independent manners [...] (202 aa) | ||||
UNE10 | Transcription factor UNE10; Required during the fertilization of ovules by pollen. (399 aa) | ||||
MED25 | Mediator of RNA polymerase II transcription subunit 25; Component of the Mediator complex, a coactivator involved in the regulated transcription of nearly all RNA polymerase II-dependent genes. Mediator functions as a bridge to convey information from gene- specific regulatory proteins to the basal RNA polymerase II transcription machinery. Mediator is recruited to promoters by direct interactions with regulatory proteins and serves as a scaffold for the assembly of a functional preinitiation complex with RNA polymerase II and the general transcription factors. Positive regulator of sh [...] (836 aa) | ||||
LSH1 | Protein LIGHT-DEPENDENT SHORT HYPOCOTYLS 1; Probable transcription regulator that acts as a developmental regulator by promoting cell growth in response to continuous red (cR), far-red (cFR) and blue (cB) light in a phytochrome-dependent manner, at least during seedling development. (190 aa) | ||||
CRY1 | Cryptochrome-1; Photoreceptor that mediates primarily blue light inhibition of hypocotyl elongation and photoperiodic control of floral initiation, and regulates other light responses, including circadian rhythms, tropic growth, stomata opening, guard cell development, root development, bacterial and viral pathogen responses, abiotic stress responses, cell cycles, programmed cell death, apical dominance, fruit and ovule development, seed dormancy, and magnetoreception. Photoexcited cryptochromes interact with signaling partner proteins to alter gene expression at both transcriptional a [...] (681 aa) | ||||
CO | Zinc finger protein CONSTANS; Transcription factor that acts in the long day flowering pathway and may mediate between the circadian clock and the control of flowering. Plays a role in the regulation of flowering time by acting on 'SUPPRESSOR OF OVEREXPRESSION OF CO1', 'TERMINAL FLOWER 1' and 'FLOWERING LOCUS T'. Also regulates P5CS2 and ACS10 (involved in proline and ethylene biosynthesis, respectively). Regulates the expression of NAKR1 by binding to the 5'-TGTG(N2-3)ATG-3' motif. (373 aa) | ||||
XTH15 | Xyloglucan endotransglucosylase/hydrolase protein 15; Catalyzes xyloglucan endohydrolysis (XEH) and/or endotransglycosylation (XET). Cleaves and religates xyloglucan polymers, an essential constituent of the primary cell wall, and thereby participates in cell wall construction of growing tissues. Has a high XET activity, but little or no XEH activity in vitro. Acceptor preferences are XXXGol > XLLGol = XLFGol > XXLGol > XXFGol. (289 aa) |