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    SF3A3 splicing factor 3a subunit 3 [ Homo sapiens (human) ]

    Gene ID: 10946, updated on 10-Dec-2024

    Summary

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    Official Symbol
    SF3A3provided by HGNC
    Official Full Name
    splicing factor 3a subunit 3provided by HGNC
    Primary source
    HGNC:HGNC:10767
    See related
    Ensembl:ENSG00000183431 MIM:605596; AllianceGenome:HGNC:10767
    Gene type
    protein coding
    RefSeq status
    REVIEWED
    Organism
    Homo sapiens
    Lineage
    Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
    Also known as
    PRP9; PRPF9; SAP61; SF3a60
    Summary
    This gene encodes subunit 3 of the splicing factor 3a protein complex. The splicing factor 3a heterotrimer includes subunits 1, 2 and 3 and is necessary for the in vitro conversion of 15S U2 snRNP into an active 17S particle that performs pre-mRNA splicing. Subunit 3 interacts with subunit 1 through its amino-terminus while the zinc finger domain of subunit 3 plays a role in its binding to the 15S U2 snRNP. This gene has a pseudogene on chromosome 20. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Mar 2016]
    Expression
    Ubiquitous expression in bone marrow (RPKM 22.5), lymph node (RPKM 20.6) and 25 other tissues See more
    Orthologs
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    Genomic context

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    See SF3A3 in Genome Data Viewer
    Location:
    1p34.3
    Exon count:
    17
    Annotation release Status Assembly Chr Location
    RS_2024_08 current GRCh38.p14 (GCF_000001405.40) 1 NC_000001.11 (37956975..37990022, complement)
    RS_2024_08 current T2T-CHM13v2.0 (GCF_009914755.1) 1 NC_060925.1 (37823865..37857205, complement)
    RS_2024_09 previous assembly GRCh37.p13 (GCF_000001405.25) 1 NC_000001.10 (38422647..38455694, complement)

    Chromosome 1 - NC_000001.11Genomic Context describing neighboring genes Neighboring gene inositol polyphosphate-5-phosphatase B Neighboring gene uncharacterized LOC124904043 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 778 Neighboring gene H3K27ac hESC enhancer GRCh37_chr1:38396367-38396866 Neighboring gene ATAC-STARR-seq lymphoblastoid silent region 683 Neighboring gene uncharacterized LOC105378651 Neighboring gene H3K27ac-H3K4me1 hESC enhancer GRCh37_chr1:38412547-38413076 Neighboring gene H3K4me1 hESC enhancer GRCh37_chr1:38414283-38414956 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 780 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 781 Neighboring gene H3K27ac-H3K4me1 hESC enhancer GRCh37_chr1:38456307-38456852 Neighboring gene Sharpr-MPRA regulatory region 8264 Neighboring gene RNA, U6 small nuclear 510, pseudogene Neighboring gene H3K27ac-H3K4me1 hESC enhancer GRCh37_chr1:38463160-38464081 Neighboring gene H3K27ac-H3K4me1 hESC enhancer GRCh37_chr1:38465171-38465958 Neighboring gene H3K27ac-H3K4me1 hESC enhancer GRCh37_chr1:38465959-38466746 Neighboring gene H3K27ac-H3K4me1 hESC enhancer GRCh37_chr1:38469196-38470004 Neighboring gene ATAC-STARR-seq lymphoblastoid silent region 684 Neighboring gene four and a half LIM domains 3

    Genomic regions, transcripts, and products

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    Go to nucleotide: Graphics FASTA GenBank

    Bibliography

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    Related articles in PubMed

    1. Oncogenic translation directs spliceosome dynamics revealing an integral role for SF3A3 in breast cancer. Cieśla M, et al. Mol Cell, 2021 Apr 1. PMID 33662273
    2. Splicing factor SF3a60 is the mammalian homologue of PRP9 of S.cerevisiae: the conserved zinc finger-like motif is functionally exchangeable in vivo. Krämer A, et al. Nucleic Acids Res, 1994 Dec 11. PMID 7816610, Free PMC Article
    3. Specific inhibition of transcriptional activity of the constitutive androstane receptor (CAR) by the splicing factor SF3a3. Yun HJ, et al. Biol Chem, 2008 Oct. PMID 18713018
    4. CircSCAP interacts with SF3A3 to inhibit the malignance of non-small cell lung cancer by activating p53 signaling. Chen D, et al. J Exp Clin Cancer Res, 2022 Apr 1. PMID 35365208, Free PMC Article
    5. Solution structures of the SURP domains and the subunit-assembly mechanism within the splicing factor SF3a complex in 17S U2 snRNP. Kuwasako K, et al. Structure, 2006 Nov. PMID 17098193

    See all (170) citations in PubMed

    GeneRIFs: Gene References Into Functions

    What's a GeneRIF?
    1. CircSCAP interacts with SF3A3 to inhibit the malignance of non-small cell lung cancer by activating p53 signaling.
      Title: CircSCAP interacts with SF3A3 to inhibit the malignance of non-small cell lung cancer by activating p53 signaling.
    2. Oncogenic translation directs spliceosome dynamics revealing an integral role for SF3A3 in breast cancer.
      Title: Oncogenic translation directs spliceosome dynamics revealing an integral role for SF3A3 in breast cancer.
    3. The interaction between CSR1 and SF3A3 led to migration of SF3A3 from nucleus to cytoplasm. The cytoplasmic redistribution of SF3A3 significantly reduced the splicing efficiency of epidermal growth factor receptor and platelet-derived growth factor receptor.
      Title: Cellular stress response 1 down-regulates the expression of epidermal growth factor receptor and platelet-derived growth factor receptor through inactivation of splicing factor 3A3.
    4. SF3a3 functions as a co-repressor of Constitutive Androstane Receptor transcriptional activity, in addition to its canonical function.
      Title: Specific inhibition of transcriptional activity of the constitutive androstane receptor (CAR) by the splicing factor SF3a3.
    5. SF3a60, 66, and 120, but not SF1, are essential for pre-mRNA splicing
      Title: Human splicing factor SF3a, but not SF1, is essential for pre-mRNA splicing in vivo.
    Submit: New GeneRIF Correction

    Phenotypes

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    Find tests for this gene in the NIH Genetic Testing Registry (GTR)

    Review eQTL and phenotype association data in this region using PheGenI

    Variation

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    See variants in ClinVar

    See studies and variants in dbVar

    See Variation Viewer (GRCh37.p13)

    See Variation Viewer (GRCh38)

    HIV-1 interactions

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    Protein interactions

    Protein Gene Interaction Pubs
    Rev rev HIV-1 Rev interacting protein, splicing factor 3a, subunit 3 (SF3A3), is identified by the in-vitro binding experiments involving cytosolic or nuclear extracts from HeLa cells. The interaction of Rev with SF3A3 is increased by RRE PubMed
    retropepsin gag-pol HIV-1 PR is identified to have a physical interaction with splicing factor 3a, subunit 3 (SF3A3) in human HEK293 and/or Jurkat cell lines by using affinity tagging and purification mass spectrometry analyses PubMed

    Go to the HIV-1, Human Interaction Database

    Pathways from PubChem

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    Interactions

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    Products Interactant Other Gene Complex Source Pubs Description

    General gene information

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    Markers

    Homology

    Gene Ontology Provided by GOA

    Function Evidence Code Pubs
    enables RNA binding HDA PubMed 
    enables RNA binding IBA
    Inferred from Biological aspect of Ancestor
    more info
    		  
    enables protein binding IPI
    Inferred from Physical Interaction
    more info
    		 PubMed 
    enables zinc ion binding IEA
    Inferred from Electronic Annotation
    more info
    		  
    Process Evidence Code Pubs
    involved_in RNA splicing, via transesterification reactions TAS
    Traceable Author Statement
    more info
    		 PubMed 
    involved_in U2-type prespliceosome assembly IDA
    Inferred from Direct Assay
    more info
    		 PubMed 
    involved_in U2-type prespliceosome assembly NAS
    Non-traceable Author Statement
    more info
    		 PubMed 
    involved_in mRNA 3'-splice site recognition TAS
    Traceable Author Statement
    more info
    		 PubMed 
    involved_in mRNA processing IMP
    Inferred from Mutant Phenotype
    more info
    		 PubMed 
    involved_in mRNA splicing, via spliceosome IBA
    Inferred from Biological aspect of Ancestor
    more info
    		  
    involved_in mRNA splicing, via spliceosome IC
    Inferred by Curator
    more info
    		 PubMed 
    involved_in mRNA splicing, via spliceosome IDA
    Inferred from Direct Assay
    more info
    		 PubMed 
    involved_in mRNA splicing, via spliceosome NAS
    Non-traceable Author Statement
    more info
    		 PubMed 
    Component Evidence Code Pubs
    part_of U2 snRNP IDA
    Inferred from Direct Assay
    more info
    		 PubMed 
    part_of U2 snRNP NAS
    Non-traceable Author Statement
    more info
    		 PubMed 
    part_of U2-type precatalytic spliceosome IDA
    Inferred from Direct Assay
    more info
    		 PubMed 
    part_of U2-type spliceosomal complex IDA
    Inferred from Direct Assay
    more info
    		 PubMed 
    part_of U2-type spliceosomal complex IPI
    Inferred from Physical Interaction
    more info
    		 PubMed 
    part_of catalytic step 2 spliceosome IDA
    Inferred from Direct Assay
    more info
    		 PubMed 
    located_in nuclear speck IDA
    Inferred from Direct Assay
    more info
    		 PubMed 
    located_in nucleoplasm IDA
    Inferred from Direct Assay
    more info
    		  
    located_in nucleoplasm TAS
    Traceable Author Statement
    more info
    		  
    located_in nucleus IDA
    Inferred from Direct Assay
    more info
    		 PubMed 
    located_in nucleus NAS
    Non-traceable Author Statement
    more info
    		 PubMed 
    part_of spliceosomal complex IBA
    Inferred from Biological aspect of Ancestor
    more info
    		  
    part_of spliceosomal complex IDA
    Inferred from Direct Assay
    more info
    		 PubMed 
    part_of spliceosomal complex NAS
    Non-traceable Author Statement
    more info
    		 PubMed 

    General protein information

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    Preferred Names
    splicing factor 3A subunit 3
    Names
    SAP 61
    pre-mRNA splicing factor SF3a (60kD)
    spliceosome associated protein 61
    splicing factor 3a, subunit 3, 60kD
    splicing factor 3a, subunit 3, 60kDa

    NCBI Reference Sequences (RefSeq)

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    RefSeqs maintained independently of Annotated Genomes

    These reference sequences exist independently of genome builds. Explain

    These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.

    mRNA and Protein(s)

    1. NM_001320830.2 → NP_001307759.1  splicing factor 3A subunit 3 isoform 2

      Status: REVIEWED

      Description
      Transcript Variant: This variant (2) lacks alternate in-frame exons in the 5' coding region, compared to variant 1. The encoded isoform (2) is shorter, compared to isoform 1.
      Source sequence(s)
      AK301424, AL603790, BM455074, BM702776, DA835019
      UniProtKB/TrEMBL
      B4DW90
      Conserved Domains (2) summary
      COG5188
      Location:77 → 448
      PRP9; Splicing factor 3a, subunit 3 [RNA processing and modification]
      pfam11931
      Location:270 → 447
      DUF3449; Domain of unknown function (DUF3449)

    2. NM_006802.4 → NP_006793.1  splicing factor 3A subunit 3 isoform 1

      See identical proteins and their annotated locations for NP_006793.1

      Status: REVIEWED

      Description
      Transcript Variant: This variant (1) encodes the longer isoform (1).
      Source sequence(s)
      AL603790, BC002395, BC011523, BM702776
      Consensus CDS
      CCDS428.1
      UniProtKB/Swiss-Prot
      D3DPT5, Q12874, Q15460, Q5VT87
      UniProtKB/TrEMBL
      A8K566, A8K7V1, B3KY12, Q53HM6
      Related
      ENSP00000362110.4, ENST00000373019.5
      Conserved Domains (2) summary
      COG5188
      Location:2 → 501
      PRP9; Splicing factor 3a, subunit 3 [RNA processing and modification]
      pfam11931
      Location:323 → 500
      DUF3449; Domain of unknown function (DUF3449)

    RefSeqs of Annotated Genomes: GCF_000001405.40-RS_2024_08

    The following sections contain reference sequences that belong to a specific genome build. Explain

    Reference GRCh38.p14 Primary Assembly

    Genomic

    1. NC_000001.11 Reference GRCh38.p14 Primary Assembly

      Range
      37956975..37990022 complement
      Download
      GenBank, FASTA, Sequence Viewer (Graphics)

    Alternate T2T-CHM13v2.0

    Genomic

    1. NC_060925.1 Alternate T2T-CHM13v2.0

      Range
      37823865..37857205 complement
      Download
      GenBank, FASTA, Sequence Viewer (Graphics)
    Nucleotide Protein
    Heading Accession and Version
    Protein Accession Links
    GenPept Link UniProtKB Link
    Q12874.1 GenPept UniProtKB/Swiss-Prot:Q12874

    Gene LinkOut

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