FEATURES

FAMILY

DESCRIPTION

Also known as SF3B3_DICDI, sf3b3. Involved in pre-mRNA splicing as a component of the splicing factor SF3B complex, a constituent of the spliceosome. SF3B complex is 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. Belongs also to the minor U12-dependent spliceosome, which is involved in the splicing of rare class of nuclear pre-mRNA intron. Identified in the spliceosome A complex; remains associated with the spliceosome throughout the splicing process. Component of the spliceosome B complex. Identified in the spliceosome C complex. Identified in the spliceosome E complex. Component of the U11/U12 snRNPs that are part of the U12-type spliceosome. Component of splicing factor SF3B complex which is composed of at least eight subunits. SF3B associates with the splicing factor SF3A and a 12S RNA unit to form the U2 small nuclear ribonucleoproteins complex (U2 snRNP).

EXTERNAL LINKS

sf3b3

Probable splicing factor 3B subunit 3

sf3b3

Molecular Synopsis