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SNRPD3 | small nuclear ribonucleoprotein D3 polypeptide 18kDa; Appears to function in the U7 snRNP complex that is involved in histone 3’-end processing. Binds to the downstream cleavage product (DCP) of histone pre-mRNA in a U7 snRNP dependent manner (126 aa) | |||
SF3A2 | splicing factor 3a, subunit 2, 66kDa; Subunit of the splicing factor SF3A required for ’A’ complex assembly formed by the stable binding of U2 snRNP to the branchpoint sequence (BPS) in pre-mRNA. Sequence independent binding of SF3A/SF3B complex upstream of the branch site is essential, it may anchor U2 snRNP to the pre-mRNA. May also be involved in the assembly of the ’E’ complex (464 aa) | |||
SRSF6 | serine/arginine-rich splicing factor 6; Plays a role in constitutive splicing and can modulate the selection of alternative splice sites. Represses the splicing of MAPT/Tau exon 10 (344 aa) | |||
SNRPC | small nuclear ribonucleoprotein polypeptide C; Component of the U1 snRNP, which is essential for recognition of the pre-mRNA 5’ splice-site and the subsequent assembly of the spliceosome. U1-C is directly involved in initial 5’ splice-site recognition for both constitutive and regulated alternative splicing. The interaction with the 5’ splice-site seems to precede base-pairing between the pre-mRNA and the U1 snRNA. Stimulates E complex formation by stabilizing the base pairing of the 5’ end of the U1 snRNA and the 5’ splice-site region (159 aa) | |||
SNRPA1 | small nuclear ribonucleoprotein polypeptide A’; This protein is associated with sn-RNP U2. It helps the A’ protein to bind stem loop IV of U2 snRNA (255 aa) | |||
TGS1 | trimethylguanosine synthase 1; Catalyzes the 2 serial methylation steps for the conversion of the 7-monomethylguanosine (m(7)G) caps of snRNAs and snoRNAs to a 2,2,7-trimethylguanosine (m(2,2,7)G) cap structure. The enzyme is specific for guanine, and N7 methylation must precede N2 methylation. Hypermethylation of the m7G cap of U snRNAs leads to their concentration in nuclear foci, their colocalization with coilin and the formation of canonical Cajal bodies (CBs). Plays a role in transcriptional regulation (853 aa) | |||
UPF1 | UPF1 regulator of nonsense transcripts homolog (yeast); RNA-dependent helicase and ATPase required for nonsense- mediated decay (NMD) of mRNAs containing premature stop codons. Is recruited to mRNAs upon translation termination and undergoes a cycle of phosphorylation and dephosphorylation; its phosphorylation appears to be a key step in NMD. Recruited by release factors to stalled ribosomes together with the SMG1C protein kinase complex to form the transient SURF (SMG1-UPF1-eRF1- eRF3) complex. In EJC-dependent NMD, the SURF complex associates with the exon junction complex (EJC) (loc [...] (1118 aa) | |||
LUC7L | LUC7-like (S. cerevisiae); May bind to RNA via its Arg/Ser-rich domain (371 aa) | |||
SNRPD1 | small nuclear ribonucleoprotein D1 polypeptide 16kDa; May act as a charged protein scaffold to promote snRNP assembly or strengthen snRNP-snRNP interactions through nonspecific electrostatic contacts with RNA (119 aa) | |||
SF3B3 | splicing factor 3b, subunit 3, 130kDa; Subunit of the splicing factor SF3B required for ’A’ complex assembly formed by the stable binding of U2 snRNP to the branchpoint sequence (BPS) in pre-mRNA. Sequence independent binding of SF3A/SF3B complex upstream of the branch site is essential, it may anchor U2 snRNP to the pre-mRNA. May also be involved in the assembly of the ’E’ complex. Belongs also to the minor U12-dependent spliceosome, which is involved in the splicing of rare class of nuclear pre-mRNA intron (1217 aa) | |||
SNRPN | small nuclear ribonucleoprotein polypeptide N; May be involved in tissue-specific alternative RNA processing events (240 aa) | |||
U2AF2 | U2 small nuclear RNA auxiliary factor 2; Necessary for the splicing of pre-mRNA. Induces cardiac troponin-T (TNNT2) pre-mRNA exon inclusion in muscle. Regulates the TNNT2 exon 5 inclusion through competition with MBNL1. Binds preferentially to a single-stranded structure within the polypyrimidine tract of TNNT2 intron 4 during spliceosome assembly. Required for the export of mRNA out of the nucleus, even if the mRNA is encoded by an intron-less gene. Represses the splicing of MAPT/Tau exon 10 (475 aa) | |||
NCBP2 | nuclear cap binding protein subunit 2, 20kDa; Component of the cap-binding complex (CBC), which binds co-transcriptionally to the 5’ cap of pre-mRNAs and is involved in various processes such as pre-mRNA splicing, translation regulation, nonsense-mediated mRNA decay, RNA-mediated gene silencing (RNAi) by microRNAs (miRNAs) and mRNA export. The CBC complex is involved in mRNA export from the nucleus via its interaction with ALYREF/THOC4/ALY, leading to the recruitment of the mRNA export machinery to the 5’ end of mRNA and to mRNA export in a 5’ to 3’ direction through the nuclear pore. [...] (156 aa) | |||
EIF4G1 | eukaryotic translation initiation factor 4 gamma, 1; Component of the protein complex eIF4F, which is involved in the recognition of the mRNA cap, ATP-dependent unwinding of 5’-terminal secondary structure and recruitment of mRNA to the ribosome (1606 aa) | |||
SNRPD2 | small nuclear ribonucleoprotein D2 polypeptide 16.5kDa; Required for pre-mRNA splicing. Required for snRNP biogenesis (By similarity) (118 aa) | |||
UBC | ubiquitin C (685 aa) | |||
LUC7L2 | LUC7-like 2 (S. cerevisiae); May bind to RNA via its Arg/Ser-rich domain (392 aa) | |||
PRPF39 | PRP39 pre-mRNA processing factor 39 homolog (S. cerevisiae); Involved in pre-mRNA splicing (By similarity) (669 aa) | |||
SRSF4 | serine/arginine-rich splicing factor 4; Plays a role in alternative splice site selection during pre-mRNA splicing. Represses the splicing of MAPT/Tau exon 10 (494 aa) | |||
TRNAU1AP | tRNA selenocysteine 1 associated protein 1; Involved in the early steps of selenocysteine biosynthesis and tRNA(Sec) charging to the later steps resulting in the cotranslational incorporation of selenocysteine into selenoproteins. Stabilizes the SECISBP2, EEFSEC and tRNA(Sec) complex. May be involved in the methylation of tRNA(Sec). Enhances efficiency of selenoproteins synthesis (By similarity) (287 aa) | |||
EIF4G3 | eukaryotic translation initiation factor 4 gamma, 3; Probable component of the protein complex eIF4F, which is involved in the recognition of the mRNA cap, ATP-dependent unwinding of 5’-terminal secondary structure and recruitment of mRNA to the ribosome. Thought to be a functional homolog of EIF4G1 (1591 aa) | |||
NCBP1 | nuclear cap binding protein subunit 1, 80kDa; Component of the cap-binding complex (CBC), which binds cotranscriptionally to the 5’-cap of pre-mRNAs and is involved in various processes such as pre-mRNA splicing, translation regulation, nonsense-mediated mRNA decay, RNA-mediated gene silencing (RNAi) by microRNAs (miRNAs) and mRNA export. The CBC complex is involved in mRNA export from the nucleus via its interaction with ALYREF/THOC4/ALY, leading to the recruitment of the mRNA export machinery to the 5’-end of mRNA and to mRNA export in a 5’ to 3’ direction through the nuclear pore. T [...] (790 aa) | |||
PRPF40B | PRP40 pre-mRNA processing factor 40 homolog B (S. cerevisiae); May be involved in pre-mRNA splicing (871 aa) | |||
PRPF40A | PRP40 pre-mRNA processing factor 40 homolog A (S. cerevisiae); Binds to WASL/N-WASP and suppresses its translocation from the nucleus to the cytoplasm, thereby inhibiting its cytoplasmic function (By similarity). Plays a role in the regulation of cell morphology and cytoskeletal organization. Required in the control of cell shape and migration. May play a role in cytokinesis. May be involved in pre-mRNA splicing (930 aa) | |||
SNRPB | small nuclear ribonucleoprotein polypeptides B and B1; Appears to function in the U7 snRNP complex that is involved in histone 3’-end processing. Associated with snRNP U1, U2, U4/U6 and U5. May have a functional role in the pre-mRNA splicing or in snRNP structure. Binds to the downstream cleavage product (DCP) of histone pre-mRNA in a U7 snRNP dependent manner (By similarity) (240 aa) | |||
SNRNP70 | small nuclear ribonucleoprotein 70kDa (U1) (437 aa) |