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PRP31 PRP31 PRP6 PRP6 SPP381 SPP381 BUD31 BUD31 PRP9 PRP9 SUB2 SUB2 SNU23 SNU23 RRI1 RRI1 SLU7 SLU7 PRP28 PRP28 CDC40 CDC40 SYF1 SYF1 CWC21 CWC21 SNU13 SNU13 PRP22 PRP22 BRR2 BRR2 PRP43 PRP43 BUD13 BUD13 PRP18 PRP18 SNU71 SNU71 SYF2 SYF2 GCN5 GCN5 CWC22 CWC22 NAM8 NAM8 LIN1 LIN1 SNP1 SNP1 IST3 IST3 SET2 SET2 MUD2 MUD2 YJU2 YJU2 SNU114 SNU114 PRP16 PRP16 PML1 PML1 MSL5 MSL5 PRP39 PRP39 RSE1 RSE1 CEF1 CEF1 RNH1 RNH1 CUS1 CUS1 PRP24 PRP24 HSH155 HSH155 YSF3 YSF3 SQS1 SQS1 CWC25 CWC25 HUB1 HUB1 SNU66 SNU66 HSH49 HSH49 PRP46 PRP46 LEA1 LEA1 EAF3 EAF3 DIB1 DIB1 RDS3 RDS3
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proteins of unknown 3D structure
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PRP31Pre-mRNA-processing factor 31; Splicing factor; component of the U4/U6-U5 snRNP complex; Belongs to the PRP31 family. (494 aa)
PRP6Splicing factor; component of the U4/U6-U5 snRNP complex. (899 aa)
SPP381Pre-mRNA-splicing factor SPP381; mRNA splicing factor, component of U4/U6.U5 tri-snRNP; interacts genetically and physically with Prp38p; relocalizes to the cytosol in response to hypoxia; Belongs to the SPP381 family. (291 aa)
BUD31Pre-mRNA-splicing factor BUD31; Component of the SF3b subcomplex of the U2 snRNP; increases efficiency of first and second step pre-mRNA splicing; diploid mutants display a random budding pattern instead of the wild-type bipolar pattern; facilitates passage through G1/S Start, but is not required for G2/M transition or exit from mitosis. (157 aa)
PRP9Pre-mRNA-splicing factor PRP9; Subunit of the SF3a splicing factor complex; required for spliceosome assembly; acts after the formation of the U1 snRNP-pre-mRNA complex; Belongs to the SF3A3 family. (530 aa)
SUB2ATP-dependent RNA helicase SUB2; Component of the TREX complex required for nuclear mRNA export; member of the DEAD-box RNA helicase superfamily and is involved in early and late steps of spliceosome assembly; homolog of the human splicing factor hUAP56; relocalizes from nucleus to cytoplasm upon DNA replication stress. (446 aa)
SNU2323 kDa U4/U6.U5 small nuclear ribonucleoprotein component; Component of the U4/U6.U5 snRNP complex; involved in mRNA splicing via spliceosome. (194 aa)
RRI1Catalytic subunit of the COP9 signalosome (CSN) complex; acts as an isopeptidase in cleaving the ubiquitin-like protein Nedd8 from SCF ubiquitin ligases; metalloendopeptidase involved in the adaptation to pheromone signaling; involved in modulation of genes controlling amino acid and lipid metabolism, and ergosterol biosynthesis; Belongs to the peptidase M67A family. CSN5 subfamily. (440 aa)
SLU7Pre-mRNA-splicing factor SLU7; RNA splicing factor; required for ATP-independent portion of 2nd catalytic step of spliceosomal RNA splicing; interacts with Prp18p; contains zinc knuckle domain; Belongs to the SLU7 family. (382 aa)
PRP28Pre-mRNA-splicing ATP-dependent RNA helicase PRP28; RNA binding protein; involved in RNA isomerization at the 5' splice site and for exchange of U6 for U1 snRNA at the 5' splice site; similar to the RNA helicases of the DEAD-box family. (588 aa)
CDC40Pre-mRNA-processing factor 17; Pre-mRNA splicing factor; important for catalytic step II of pre-mRNA splicing and plays a role in cell cycle progression, particularly at the G1/S phase transition; required for DNA synthesis during mitosis and meiosis; has WD repeats; thermosensitivity of the cdc40 null mutant is functionally complemented by a chimeric construct containing the N-terminal 156 amino acids of yeast Cdc40p fused to the C-terminal two thirds (297 amino acids) of human CDC40. (455 aa)
SYF1Pre-mRNA-splicing factor SYF1; Member of the NineTeen Complex (NTC); that contains Prp19p and stabilizes U6 snRNA in catalytic forms of the spliceosome containing U2, U5, and U6 snRNAs; null mutant has splicing defect and arrests in G2/M; relocalizes to the cytosol in response to hypoxia; homologs in human and C. elegans. (859 aa)
CWC21Pre-mRNA-splicing factor CWC21; Protein involved in RNA splicing by the spliceosome; component of a complex containing Cef1p; interacts genetically with ISY1 and BUD13; may bind RNA; has similarity to S. pombe Cwf21p; Belongs to the CWC21 family. (135 aa)
SNU1313 kDa ribonucleoprotein-associated protein; RNA binding protein; part of U3 snoRNP involved in rRNA processing, part of U4/U6-U5 tri-snRNP involved in mRNA splicing, similar to human 15.5K protein; Belongs to the eukaryotic ribosomal protein eL8 family. (126 aa)
PRP22DEAH-box RNA-dependent ATPase/ATP-dependent RNA helicase; associates with lariat intermediates before the second catalytic step of splicing; mediates ATP-dependent mRNA release from the spliceosome and unwinds RNA duplexes; required for proofreading the exon ligation reaction. (1145 aa)
BRR2Pre-mRNA-splicing helicase BRR2; RNA-dependent ATPase RNA helicase (DEIH box); required for disruption of U4/U6 base-pairing in native snRNPs to activate the spliceosome for catalysis; homologous to human U5-200kD. (2163 aa)
PRP43Pre-mRNA-splicing factor ATP-dependent RNA helicase PRP43; RNA helicase in the DEAH-box family; functions in both RNA polymerase I and polymerase II transcript metabolism; catalyzes removal of U2, U5, and U6 snRNPs from the postsplicing lariat-intron ribonucleoprotein complex; required for efficient biogenesis of both small- and large-subunit rRNAs; acts with Sqs1p to promote 20S to 18S rRNA processing catalyzed by endonuclease Nob1p; Belongs to the DEAD box helicase family. DEAH subfamily. DDX15/PRP43 sub-subfamily. (767 aa)
BUD13Pre-mRNA-splicing factor CWC26; Subunit of the RES complex; RES complex is required for nuclear pre-mRNA retention and splicing; involved in bud-site selection; diploid mutants display a unipolar budding pattern instead of the wild-type bipolar pattern due to a specific defect in MATa1 pre-mRNA splicing which leads to haploid gene expression in diploids; Belongs to the CWC26 family. (266 aa)
PRP18Pre-mRNA-splicing factor 18; Splicing factor and component of snRNP U5; factor involved in the positioning of the 3' splice site during the second catalytic step of splicing; interacts with Slu7p. (251 aa)
SNU71U1 small nuclear ribonucleoprotein component SNU71; Component of U1 snRNP required for mRNA splicing via spliceosome; yeast specific, no metazoan counterpart; Belongs to the SNU71 family. (620 aa)
SYF2Pre-mRNA-splicing factor SYF2; Member of the NineTeen Complex (NTC); NTC contains Prp19p and stabilizes U6 snRNA in catalytic forms of the spliceosome containing U2, U5, and U6 snRNAs; relocalizes to the cytosol in response to hypoxia; isy1 syf2 cells have defective spindles activiating cell cycle arrest. (215 aa)
GCN5Catalytic subunit of ADA and SAGA histone acetyltransferase complexes; modifies N-terminal lysines on histones H2B and H3; acetylates Rsc4p, a subunit of the RSC chromatin-remodeling complex, altering replication stress tolerance; relocalizes to the cytosol in response to hypoxia; mutant displays reduced transcription elongation in the G-less-based run-on (GLRO) assay; greater involvement in repression of RNAPII-dependent transcription than in activation; Belongs to the acetyltransferase family. GCN5 subfamily. (439 aa)
CWC22Pre-mRNA-splicing factor CWC22; Spliceosome-associated protein that is required for pre-mRNA splicing; necessary for Prp2p function at the first catalytic step of splicing; has similarity to S. pombe Cwf22p; CWC22 is an essential protein. (577 aa)
NAM8RNA binding protein, component of the U1 snRNP protein; mutants are defective in meiotic recombination and in formation of viable spores, involved in the formation of DSBs through meiosis-specific splicing of REC107 pre-mRNA; Nam8p regulon embraces the meiotic pre-mRNAs of REC107, HFM1, AMA1 SPO22 and PCH2; the putative RNA binding domains RRM2 and RRM3 are required for Nam8p meiotic function. (523 aa)
LIN1Protein LIN1; Non-essential component of U5 snRNP; nuclear protein; physically interacts with Irr1p of cohesin complex; may link together proteins involved in chromosome segregation, mRNA splicing and DNA replication. (340 aa)
SNP1U1 small nuclear ribonucleoprotein 70 kDa homolog; Component of U1 snRNP required for mRNA splicing via spliceosome; substrate of the arginine methyltransferase Hmt1p; may interact with poly(A) polymerase to regulate polyadenylation; homolog of human U1 70K protein; protein abundance increases in response to DNA replication stress. (300 aa)
IST3Component of the U2 snRNP; required for the first catalytic step of splicing and for spliceosomal assembly; interacts with Rds3p and is required for Mer1p-activated splicing; diploid mutants have a specific defect in MATa1 pre-mRNA splicing which leads to haploid gene expression in diploids; Belongs to the IST3 family. (148 aa)
SET2Histone-lysine N-methyltransferase, H3 lysine-36 specific; Histone methyltransferase with a role in transcriptional elongation; methylates H3 lysine 36 (H3K36), which suppresses incorporation of acetylated histones and signals for the deacetylation of these histones within transcribed genes; associates with the C-terminal domain(CTD) of Rpo21p; H3K36me3 (trimethylation) requires Spt6p, proline 38 on H3, CTD of Rpo21p, Ctk1p, and C-terminal SRI domain of Ste2p; relocalizes to the cytosol in response to hypoxia. (733 aa)
MUD2Splicing factor MUD2; Protein involved in early pre-mRNA splicing; component of the pre-mRNA-U1 snRNP complex, the commitment complex; interacts with Msl5p/BBP splicing factor and Sub2p; similar to metazoan splicing factor U2AF65. (527 aa)
YJU2Splicing factor YJU2; Essential protein required for pre-mRNA splicing; associates transiently with the spliceosomal NTC ("nineteen complex") and acts after Prp2p to promote the first catalytic reaction of splicing. (278 aa)
SNU114Pre-mRNA-splicing factor SNU114; GTPase component of U5 snRNP involved in mRNA splicing via spliceosome; binds directly to U5 snRNA; proposed to be involved in conformational changes of the spliceosome; similarity to ribosomal translocation factor EF-2. (1008 aa)
PRP16DEAH-box RNA helicase involved in second catalytic step of splicing and in exon ligation; exhibits ATP-dependent RNA unwinding activity; mediates the release of Yju2p and Cwc25p in the second step; in the absence of ATP, stabilizes the binding of Cwc25p to the spliceosome in the first catalytic step; missense mutation in human ortholog DHX38 associated with early-onset retinitis pigmentosa; Belongs to the DEAD box helicase family. DEAH subfamily. PRP16 sub-subfamily. (1071 aa)
PML1Pre-mRNA leakage protein 1; Subunit of the RES complex; RES complex is required for nuclear retention of unspliced pre-mRNAs; acts in the same pathway as Pml39p and Mlp1p. (204 aa)
MSL5Branchpoint-bridging protein; Component of commitment complex; which defines first step in splicing pathway; essential protein that interacts with Mud2p and Prp40p, forming a bridge between the intron ends; also involved in nuclear retention of pre-mRNA; relocalizes to the cytosol in response to hypoxia. (476 aa)
PRP39Pre-mRNA-processing factor 39; U1 snRNP protein involved in splicing; contains multiple tetriatricopeptide repeats. (629 aa)
RSE1Pre-mRNA-splicing factor RSE1; Protein involved in pre-mRNA splicing; component of the pre-spliceosome; associates with U2 snRNA; involved in ER to Golgi transport; Belongs to the RSE1 family. (1361 aa)
CEF1Pre-mRNA-splicing factor CEF1; Essential splicing factor; associated with Prp19p and the spliceosome, contains an N-terminal c-Myb DNA binding motif necessary for cell viability but not for Prp19p association, evolutionarily conserved and homologous to S. pombe Cdc5p. (590 aa)
RNH1Ribonuclease H1; able to bind double-stranded RNAs and RNA-DNA hybrids; associates with RNAse polymerase I. (348 aa)
CUS1Cold sensitive U2 snRNA suppressor 1; Protein required for assembly of U2 snRNP into the spliceosome; forms a complex with Hsh49p and Hsh155p. (436 aa)
PRP24U4/U6 snRNA-associated-splicing factor PRP24; Splicing factor that reanneals snRNPs during spliceosome recycling; reanneals U4 and U6 snRNPs. (444 aa)
HSH155U2-snRNP associated splicing factor; forms extensive associations with the branch site-3' splice site-3' exon region upon prespliceosome formation; similarity to the mammalian U2 snRNP-associated splicing factor SAP155. (971 aa)
YSF3RDS3 complex subunit 10; Component of the SF3b subcomplex of the U2 snRNP; essential protein required for splicing and for assembly of SF3b. (85 aa)
SQS1Protein that stimulates the ATPase and helicase activities of Prp43p; acts with Prp43p to stimulate 18s rRNA maturation by Nob1p; overexpression antagonizes the suppression of splicing defects by spp382 mutants; component of pre-ribosomal particles; relocalizes from nucleus to nucleolus upon DNA replication stress; Belongs to the SQS1 family. (767 aa)
CWC25Pre-mRNA-splicing factor CWC25; Splicing factor required for the first step of pre-mRNA splicing; binding to the spliceosome requires Prp2p and Yju2p; heat-stable protein; has similarity to S. pombe Cwf25p; Belongs to the CWC25 family. (179 aa)
HUB1Ubiquitin-like protein modifier; promotes alternative splicing of SRC1 pre-mRNA; binds non-covalently to the HIND domain of Snu66, may function in modification of Sph1p and Hbt1p, functionally complemented by the human or S. pombe ortholog; mechanism of Hub1p adduct formation not yet clear. (73 aa)
SNU6666 kDa U4/U6.U5 small nuclear ribonucleoprotein component; Component of the U4/U6.U5 snRNP complex; involved in pre-mRNA splicing via spliceosome; also required for pre-5S rRNA processing and may act in concert with Rnh70p; has homology to human SART-1. (587 aa)
HSH49Protein HSH49; U2-snRNP associated splicing factor; similar to the mammalian splicing factor SAP49; proposed to function as a U2-snRNP assembly factor along with Hsh155p and binding partner Cus1p; contains two RNA recognition motifs (RRM). (213 aa)
PRP46Pre-mRNA-splicing factor PRP46; Member of the NineTeen Complex (NTC); this complex contains Prp19p and stabilizes U6 snRNA in catalytic forms of the spliceosome containing U2, U5, and U6 snRNAs. (451 aa)
LEA1U2 small nuclear ribonucleoprotein A; Component of U2 snRNP complex; disruption causes reduced U2 snRNP levels; physically interacts with Msl1p; putative homolog of human U2A' snRNP protein; Belongs to the U2 small nuclear ribonucleoprotein A family. (238 aa)
EAF3Chromatin modification-related protein EAF3; Component of the Rpd3S histone deacetylase complex; Esa1p-associated factor, nonessential component of the NuA4 acetyltransferase complex, homologous to Drosophila dosage compensation protein MSL3; plays a role in regulating Ty1 transposition. (401 aa)
DIB1Spliceosomal protein DIB1; 17-kDa component of the U4/U6aU5 tri-snRNP; plays an essential role in pre-mRNA splicing; human ortholog TXNL4A (the human U5-specific 15-kDa protein) complements yeast dib1 null mutant; Belongs to the DIM1 family. (143 aa)
RDS3Pre-mRNA-splicing factor RDS3; Component of the SF3b subcomplex of the U2 snRNP; zinc cluster protein involved in pre-mRNA splicing and cycloheximide resistance. (107 aa)
Your Current Organism:
Saccharomyces cerevisiae
NCBI taxonomy Id: 4932
Other names: ATCC 18824, Candida robusta, Mycoderma cerevisiae, NRRL Y-12632, S. cerevisiae, Saccharomyces capensis, Saccharomyces italicus, Saccharomyces oviformis, Saccharomyces uvarum var. melibiosus, yeast
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