SF3B6
protein-codingsplicing factor 3b subunit 6, the group of SF3b complex
Gene summary
This gene encodes a 14 kDa protein subunit of the splicing factor 3b complex. Splicing factor 3b associates with both the U2 and U11/U12 small nuclear ribonucleoprotein complexes (U2 snRNP) of spliceosomes. This 14 kDa protein interacts directly with subunit 1 of the splicing factor 3b complex. This 14 kDa protein also interacts directly with the adenosine that carries out the first transesterification step of splicing at the pre-mRNA branch site. [provided by RefSeq, Jul 2008]
MANE transcript
Inheritance
ClinVar variants
Top phenotype
gnomAD constraint
Max pathogenic AF
Genomic locus
External References & Databases
Transcript & Mutation Effects
hg38 • Region Span ~8.8 kbGenCC Phenotypes & Disease Associations
Curated gene-disease validity assertions and inheritance patterns
No GenCC data available for this gene.
ClinVar Associated Diseases & Phenotypes
Reported disease conditions connected to SF3B6 variants in ClinVar
ClinVar Variants & Pathogenicity by Type
Statistics based on transcript NM_016047.4. Only rare variants are included.
We include only reliable ClinVar variants with their consequences to MANE Select, MANE Plus Clinical transcripts, or transcripts with TSL equal to 1. Click a count to filter the variants table below.
Slight differences between displayed counts and ClinVar may occur due to a different transcript/consequence chosen by our variant effect predictor, or because we classify Benign/Likely benign as Likely benign and Pathogenic/Likely pathogenic as Likely pathogenic.
| Effect | PathogenicP | Likely pathogenicLP | VUS | Likely benignLB | BenignB | Sum |
|---|---|---|---|---|---|---|
| synonymous | 1 | 1 | 2 | |||
| missense | 5 | 5 | ||||
| nonsense | 0 | |||||
| start loss | 0 | |||||
| frameshift | 0 | |||||
| splice donor/acceptor (+/-2bp) | 2 | 2 | ||||
| Total | 0 | 0 | 7 | 1 | 1 | 9 |
Transcript Catalog
Annotated transcript isoforms across RefSeq and Ensembl databases
| Transcript ID | Source | Protein ID | Coding Exons | MANE Status |
|---|---|---|---|---|
| RefSeq | NP_057131.1 | 4 | MANE Select | |
| Ensembl | ENSP00000233468.4 | 4 | MANE Select | |
| Ensembl | ENSP00000552856.1 | 4 | Standard | |
| Ensembl | ENSP00000552856.1 | 4 | Standard |
Gene Ontology (GO) Annotations & Pathways
Biological processes, molecular functions, cellular components and pathways
Pathways ConsensusPathDB
- Spliceosome - Homo sapiens (human)
- Metabolism of RNA
- mRNA Splicing - Major Pathway
- mRNA Splicing - Minor Pathway
- mRNA Splicing
Biological Process
- mRNA splicing, via spliceosome
- blastocyst formation
Molecular Function
- RNA binding
- protein binding
Cellular Component
- nucleoplasm
- U2 snRNP
- U12-type spliceosomal complex
- catalytic step 2 spliceosome
gnomAD Constraint
Source:
- Gene type
- protein_coding
- Transcript type
- protein_coding
- Transcript
- ENST00000233468
- Coding exons
- 4
- Length
- 8860
- Individuals with no LoFs
- 125739
- Homozygous LoFs
- 0
- Heterozygous LoFs
- 6
- Defined
- 125745
- p
- 0.0000239
| Z-Score | Observed | Expected | Observed/Expected | Mutation Rate | Total Possible | |
|---|---|---|---|---|---|---|
| Missense | 1.90 | 25 | 69.6 | 0.359 | 0.00000340 | 823 |
| Missense (PolyPhen) | 6 | 17.091 | 0.35106 | 203 | ||
| Synonymous | 0.551 | 20 | 23.4 | 0.855 | 0.00000112 | 219 |
| Loss of Function | 2.10 | 1 | 6.98 | 0.143 | 3.60e-7 | 88 |
Population LoF Frequency
| Population | CAF | p-value | Status |
|---|---|---|---|
| African | 0 | 0.0 | absent |
| Latino/Admixed American | 0.000029 | 0.000029 | rare |
| Ashkenazi Jewish | 0 | 0.0 | absent |
| East Asian | 0 | 0.0 | absent |
| Finnish | 0 | 0.0 | absent |
| European (Non-Finnish) | 0.000035 | 0.000035 | rare |
| South Asian | 0.000036 | 0.000033 | rare |
| Other | 0 | 0.0 | absent |
dbNSFP Gene Annotations
Source:
- Function
- FUNCTION: Involved in pre-mRNA splicing as a component of the splicing factor SF3B complex (PubMed:27720643). SF3B complex is required for 'A' complex assembly formed by the stable binding of U2 snRNP to the branchpoint sequence (BPS) in pre-mRNA (PubMed:12234937). Directly contacts the pre-mRNA branch site adenosine for the first catalytic step of splicing (PubMed:16432215). Enters the spliceosome and associates with the pre-mRNA branch site as part of the 17S U2 or, in the case of the minor spliceosome, as part of the 18S U11/U12 snRNP complex, and thus may facilitate the interaction of these snRNP with the branch sites of U2 and U12 respectively (PubMed:16432215). {ECO:0000269|PubMed:12234937, ECO:0000269|PubMed:16432215, ECO:0000269|PubMed:27720643}.;
Essentials
- Essential (gene trap)
- E