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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) | |||
SNRPA | small nuclear ribonucleoprotein polypeptide A; Binds stem loop II of U1 snRNA. It is the first snRNP to interact with pre-mRNA. This interaction is required for the subsequent binding of U2 snRNP and the U4/U6/U5 tri-snRNP. In a snRNP-free form (SF-A) may be involved in coupled pre-mRNA splicing and polyadenylation process. Binds preferentially to the 5’-UGCAC-3’ motif in vitro (282 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) | |||
NUP85 | nucleoporin 85kDa; Essential component of the nuclear pore complex (NPC) that seems to be required for NPC assembly and maintenance. As part of the NPC Nup107-160 subcomplex plays a role in RNA export and in tethering NUP98/Nup98 and NUP153 to the nucleus. The Nup107-160 complex seems to be required for spindle assembly during mitosis. NUP85 is required for membrane clustering of CCL2- activated CCR2. Seems to be involved in CCR2-mediated chemotaxis of monocytes and may link activated CCR2 to the phosphatidyl- inositol 3-kinase-Rac-lammellipodium protrusion cascade (656 aa) | |||
NAA38 | N(alpha)-acetyltransferase 38, NatC auxiliary subunit; Binds specifically to the 3’-terminal U-tract of U6 snRNA and is probably a component of the spliceosome (96 aa) | |||
NUPL2 | nucleoporin like 2; Required for the export of mRNAs containing poly(A) tails from the nucleus into the cytoplasm. In case of infection by HIV-1, it may participate in the docking of viral Vpr at the nuclear envelope (423 aa) | |||
SNRPF | small nuclear ribonucleoprotein polypeptide F; 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 (86 aa) | |||
SNRPG | small nuclear ribonucleoprotein polypeptide G; 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 (76 aa) | |||
POLR2H | polymerase (RNA) II (DNA directed) polypeptide H; DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. Common component of RNA polymerases I, II and III which synthesize ribosomal RNA precursors, mRNA precursors and many functional non-coding RNAs, and small RNAs, such as 5S rRNA and tRNAs, respectively (150 aa) | |||
PHAX | phosphorylated adaptor for RNA export; A phosphoprotein adapter involved in the XPO1-mediated U snRNA export from the nucleus. Bridge components required for U snRNA export, the cap binding complex (CBC)-bound snRNA on the one hand and the GTPase Ran in its active GTP-bound form together with the export receptor XPO1 on the other. Its phosphorylation in the nucleus is required for U snRNA export complex assembly and export, while its dephosphorylation in the cytoplasm causes export complex disassembly. It is recycled back to the nucleus via the importin alpha/beta heterodimeric import [...] (394 aa) | |||
CPSF2 | cleavage and polyadenylation specific factor 2, 100kDa; Component of the cleavage and polyadenylation specificity factor (CPSF) complex that play a key role in pre-mRNA 3’-end formation, recognizing the AAUAAA signal sequence and interacting with poly(A) polymerase and other factors to bring about cleavage and poly(A) addition. Involved in the histone 3’ end pre-mRNA processing (782 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) | |||
CD2BP2 | CD2 (cytoplasmic tail) binding protein 2; Involved in pre-mRNA splicing as component of the U5 snRNP complex that is involved in spliceosome assembly (341 aa) | |||
SNRNP200 | small nuclear ribonucleoprotein 200kDa (U5); RNA helicase that plays an essential role in pre-mRNA splicing as component of the U5 snRNP and U4/U6-U5 tri-snRNP complexes. Involved in spliceosome assembly, activation and disassembly. Mediates changes in the dynamic network of RNA-RNA interactions in the spliceosome. Catalyzes the ATP-dependent unwinding of U4/U6 RNA duplices, an essential step in the assembly of a catalytically active spliceosome (2136 aa) | |||
NUP43 | nucleoporin 43kDa; Component of the Nup107-160 subcomplex of the nuclear pore complex (NPC). The Nup107-160 subcomplex is required for the assembly of a functional NPC. The Nup107-160 subcomplex is also required for normal kinetochore microtubule attachment, mitotic progression and chromosome segregation (380 aa) | |||
SNRPD2 | small nuclear ribonucleoprotein D2 polypeptide 16.5kDa; Required for pre-mRNA splicing. Required for snRNP biogenesis (By similarity) (118 aa) | |||
PCBP2 | poly(rC) binding protein 2 (366 aa) | |||
MAGOH | mago-nashi homolog, proliferation-associated (Drosophila); Component of a splicing-dependent multiprotein exon junction complex (EJC) deposited at splice junction on mRNAs. The EJC is a dynamic structure consisting of a few core proteins and several more peripheral nuclear and cytoplasmic associated factors that join the complex only transiently either during EJC assembly or during subsequent mRNA metabolism. Core components of the EJC, that remains bound to spliced mRNAs throughout all stages of mRNA metabolism, functions to mark the position of the exon-exon junction in the mature mR [...] (146 aa) | |||
SMN1 | survival of motor neuron 1, telomeric; The SMN complex plays an essential role in spliceosomal snRNP assembly in the cytoplasm and is required for pre-mRNA splicing in the nucleus. It may also play a role in the metabolism of snoRNPs (294 aa) | |||
GTF2F1 | general transcription factor IIF, polypeptide 1, 74kDa; TFIIF is a general transcription initiation factor that binds to RNA polymerase II and helps to recruit it to the initiation complex in collaboration with TFIIB. It promotes transcription elongation (517 aa) | |||
SNRPE | small nuclear ribonucleoprotein polypeptide E; 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 (92 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) | |||
CLNS1A | chloride channel, nucleotide-sensitive, 1A; The interaction with Sm proteins inhibits their assembly on U RNA and interferes with snRNP biogenesis. Inhibits the binding of survival motor neuron protein (SMN) to Sm proteins. May participate in cellular volume control by activation of a swelling-induced chloride conductance pathway (237 aa) | |||
CLP1 | cleavage and polyadenylation factor I subunit 1; Polynucleotide kinase that can phosphorylate the 5’- hydroxyl groups of double-stranded RNA (dsRNA), single-stranded RNA (ssRNA), double stranded DNA (dsDNA) and double-stranded DNA-RNA hybrids. dsRNA is phosphorylated more efficiently than dsDNA, and the RNA component of a DNA-RNA hybrid is phosphorylated more efficiently than the DNA component. Appears to have roles in both tRNA splicing and mRNA 3’-end formation. Component of the tRNA splicing endonuclease complex. Phosphorylates the 5’-terminus of the tRNA 3’-exon during tRNA splicin [...] (425 aa) | |||
SNRNP70 | small nuclear ribonucleoprotein 70kDa (U1) (437 aa) |