FlyBase Gene Report: Dmel\Sf3b6

General Information

Symbol

Dmel\Sf3b6

Species

D. melanogaster

Name

Splicing factor 3b subunit 6

Annotation Symbol

CG13298

Feature Type

protein_coding_gene

FlyBase ID

FBgn0035692

Gene Model Status

Current

Stock Availability

9 publicly available

Gene Summary

Involved in pre-mRNA splicing as a component of the splicing factor SF3B complex (Probable). SF3B complex is required for 'A' complex assembly formed by the stable binding of U2 snRNP to the branchpoint sequence (BPS) in pre-mRNA (By similarity). Directly contacts the pre-mRNA branch site adenosine for the first catalytic step of splicing (By similarity). 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 (By similarity). (UniProt, Q9VRV7)

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All Summaries

Alliance
Auto summary
Gene Group
UniProtKB
Interactive Fly

Key Links

Genomic Location

Cytogenetic map

65A8-65A8

Sequence location

3L:6,192,124..6,193,179 [-]

Recombination map

3-16

RefSeq locus

NT_037436 REGION:6192124..6193179

Sequence

Get Decorated FASTA

Genomic Maps

JBrowse

Other Genome Views

The following external sites may use different assemblies or annotations than FlyBase.

Function

Gene Ontology (GO) Annotations (6 terms)

Molecular Function (3 terms)

Terms Based on Experimental Evidence (0 terms)

Terms Based on Predictions or Assertions (3 terms)

CV Term

Evidence

References

enables mRNA binding

inferred from sequence or structural similarity

(Lasko, 2000)

enables nucleic acid binding

inferred from electronic annotation with InterPro:IPR035979

(InterPro Project Members, 2004-)

enables RNA binding

inferred from electronic annotation with InterPro:IPR000504

(InterPro Project Members, 2004-)

Biological Process (1 term)

Terms Based on Experimental Evidence (0 terms)

Terms Based on Predictions or Assertions (1 term)

CV Term

Evidence

References

involved_in mRNA splicing, via spliceosome

inferred by curator from GO:0071011,GO:0071013

(Herold et al., 2009)

Cellular Component (2 terms)

Terms Based on Experimental Evidence (2 terms)

CV Term

Evidence

References

part_of catalytic step 2 spliceosome

inferred from high throughput direct assay

(Herold et al., 2009)

part_of precatalytic spliceosome

inferred from high throughput direct assay

(Herold et al., 2009)

Terms Based on Predictions or Assertions (0 terms)

Gene Group (FlyBase)

U2 SMALL NUCLEAR RIBONUCLEOPROTEIN PARTICLE

SPLICEOSOME COMPLEX A

SPLICEOSOME COMPLEX B

SPLICEOSOME COMPLEX C

SPLICEOSOME COMPLEX P

Protein Family (UniProt)

Belongs to the SF3B6 family. (Q9VRV7)

Protein Signatures (InterPro)

Summaries

Gene Group (FlyBase)

U2 SMALL NUCLEAR RIBONUCLEOPROTEIN PARTICLE -: The U2 small nuclear ribonucleoprotein particle (U2 snRNP) contains U2 snRNA. It is recruited to the spliceosome after U1 snRNP and forms a stable interaction with the branch site and 3' splice site in pre-mRNA. (Adapted from PMID:23829528 and PMID:21441581).
SPLICEOSOME COMPLEX A -: Nuclear pre-mRNA splicing is catalyzed by the spliceosome which assembles in a step-wise manner. Complex A, the pre-spliceosome, is composed of U1 and U2 snRNPs and proteins involved in recognition of the 5' splice site and branch point. (Adapted from PMID:24452469 and PMID:23118483).
SPLICEOSOME COMPLEX B -: Nuclear pre-mRNA splicing is catalyzed by the spliceosome which assembles in a step-wise manner. After the assembly of complex A on pre-mRNA, the U4-U6 and U5 snRNPs are recruited as a preassembled tri-snRNP to form complex B. U5 snRNP binds exons at the 5' site. (Adapted from PMID:24452469 and PMID:23118483).
SPLICEOSOME COMPLEX C -: Nuclear pre-mRNA splicing is catalyzed by the spliceosome which assembles in a step-wise manner. Complex B undergoes a number of structural rearrangements and U4 and U1 snRNPs dissociate to generate complex C, the catalytic spliceosome. (Adapted from PMID:24452469 and PMID:23118483).
SPLICEOSOME COMPLEX P -: Nuclear pre-mRNA splicing is catalyzed by the spliceosome which assembles in a step-wise manner. Complex P, the post-spliceosomal complex, is formed after the catalytic removal of the intron by complex C. Complex P contains the lariat intron and spliced exons. (Adapted from PMID:24452469 and PMID:23118483).

Protein Function (UniProtKB)

(UniProt, Q9VRV7)

Gene Model and Products

Number of Transcripts

Number of Unique Polypeptides

Please see the JBrowse view of Dmel\Sf3b6 for information on other features

To submit a correction to a gene model please use the Contact FlyBase form

Protein Domains (via Pfam)

Isoform displayed:

Pfam protein domains

InterPro name

classification

start

end

Protein Domains (via SMART)

Isoform displayed:

SMART protein domains

InterPro name

classification

start

end

Structure

Protein 3D structure (Predicted by AlphaFold) (AlphaFold entry Q9VRV7)

If you don't see a structure in the viewer, refresh your browser.

Model Confidence:

Very high (pLDDT > 90)
Confident (90 > pLDDT > 70)
Low (70 > pLDDT > 50)
Very low (pLDDT < 50)

AlphaFold produces a per-residue confidence score (pLDDT) between 0 and 100. Some regions with low pLDDT may be unstructured in isolation.

Experimentally Determined Structures

Crossreferences

Comments on Gene Model

Low-frequency RNA-Seq exon junction(s) not annotated.

Gene model reviewed during 5.46

Transcript Data

Annotated Transcripts

Name

FlyBase ID

RefSeq ID

Length (nt)

Assoc. CDS (aa)

Sf3b6-RA

FBtr0077015

NM_139780

920

121

Additional Transcript Data and Comments

Reported size (kB)

Comments

External Data

Crossreferences

Polypeptide Data

Annotated Polypeptides

Name

FlyBase ID

Predicted MW (kDa)

Length (aa)

Theoretical pI

UniProt

RefSeq ID

GenBank

Sf3b6-PA

FBpp0076723

14.2

121

9.71

Q9VRV7

NP_648037

AAF50675

Polypeptides with Identical Sequences

There is only one protein coding transcript and one polypeptide associated with this gene

Additional Polypeptide Data and Comments

Reported size (kDa)

Comments

External Data

Subunit Structure (UniProtKB)

Component of splicing factor SF3B complex (PubMed:18981222). Component of the U11/U12 snRNPs that are part of the U12-type spliceosome (By similarity).

(UniProt, Q9VRV7)

Crossreferences

InterPro - A database of protein families, domains and functional sites

Linkouts

Sequences Consistent with the Gene Model

Mapped Features

Click to get a list of regulatory features (enhancers, TFBS, etc.) and gene disruptions (point mutations, indels, etc.) within or overlapping Dmel\Sf3b6 using the Feature Mapper tool.

External Data

Crossreferences

Eukaryotic Promoter Database - A collection of databases of experimentally validated promoters for selected model organisms.

CG13298_1

Linkouts

Expression Data

Testis-specificity index

The testis specificity index was calculated from modENCODE tissue expression data by Vedelek et al., 2018 to indicate the degree of testis enrichment compared to other tissues. Scores range from -2.52 (underrepresented) to 5.2 (very high testis bias).

0.47

Transcript Expression

in situ

Stage

Tissue/Position (including subcellular localization)

Reference

embryonic stage 1 -- 3

organism | ubiquitous

Comment: maternally deposited

(Fisher et al., 2012)

embryonic stage 4 -- 6

organism | ubiquitous

(Fisher et al., 2012)

embryonic stage 7 -- 8

organism | ubiquitous

(Fisher et al., 2012)

trunk mesoderm

(Fisher et al., 2012)

embryonic stage 9 -- 10

antennal primordium