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SNRPA1 SNRPA1 SNRPB SNRPB PTBP1 PTBP1 SF3A3 SF3A3 SNRPE SNRPE SNRNP70 SNRNP70 SNRPA SNRPA SNRPD3 SNRPD3 U2AF2 U2AF2 SNRPD1 SNRPD1 SNRPF SNRPF
"SNRPA" - small nuclear ribonucleoprotein polypeptide A in Homo sapiens
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Network nodes represent proteins
splice isoforms or post-translational modifications are collapsed, i.e. each node represents all the proteins produced by a single, protein-coding gene locus.
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small protein node
small nodes:
protein of unknown 3D structure
large protein node
large nodes:
some 3D structure is known or predicted
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query proteins and first shell of interactors
non-colored protein node
white nodes:
second shell of interactors
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Edges represent protein-protein associations
associations are meant to be specific and meaningful, i.e. proteins jointly contribute to a shared function; this does not necessarily mean they are physically binding each other.
Known Interactions
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from curated databases
experiment edge
experimentally determined
Predicted Interactions
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fusion edge
gene fusions
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gene co-occurrence
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textmining
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homology edge
protein homology
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SNRPAsmall 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)    
Predicted Functional Partners:
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)
      score_image score_image score_image score_image   0.999
SNRNP70
small nuclear ribonucleoprotein 70kDa (U1) (437 aa)
        score_image score_image score_image   0.999
PTBP1
polypyrimidine tract binding protein 1; Plays a role in pre-mRNA splicing and in the regulation of alternative splicing events. Activates exon skipping of its own pre-mRNA during muscle cell differentiation. Binds to the polypyrimidine tract of introns. May promote RNA looping when bound to two separate polypyrimidine tracts in the same pre-mRNA. May promote the binding of U2 snRNP to pre-mRNA. Cooperates with RAVER1 to modulate switching between mutually exclusive exons during maturation of the TPM1 pre-mRNA. Represses the splicing of MAPT/Tau exon 10 (557 aa)
        score_image score_image score_image   0.998
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)
      score_image score_image score_image score_image   0.998
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)
      score_image score_image score_image score_image   0.998
SF3A3
splicing factor 3a, subunit 3, 60kDa; 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 (501 aa)
        score_image score_image score_image   0.997
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)
      score_image score_image score_image score_image   0.997
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)
      score_image score_image score_image score_image   0.995
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)
      score_image score_image score_image score_image   0.995
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)
      score_image score_image score_image score_image   0.994
Your Current Organism:
Homo sapiens
NCBI taxonomy Id: 9606
Other names: H. sapiens, Homo, Homo sapiens, human, man
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