RBM39

This gene encodes a member of the U2AF65 family of proteins. The encoded protein is found in the nucleus, where it co-localizes with core spliceosomal proteins. It has been shown to play a role in both steroid hormone receptor-mediated transcription and alternative splicing, and it is also a transcriptional coregulator of the viral oncoprotein v-Rel. Multiple transcript variants have been observed for this gene. A related pseudogene has been identified on chromosome X. [provided by RefSeq, Aug 2011]

Full Name

RNA Binding Motif Protein 39

Function

RNA-binding protein that acts as a pre-mRNA splicing factor (PubMed:15694343, PubMed:31271494, PubMed:28437394, PubMed:28302793, PubMed:24795046).
Acts by promoting exon inclusion via regulation of exon cassette splicing (PubMed:31271494).
Also acts as a transcriptional coactivator for steroid nuclear receptors ESR1/ER-alpha and ESR2/ER-beta, and JUN/AP-1, independently of the pre-mRNA splicing factor activity (By similarity).

Biological Process

Biological Process mRNA processingIEA:UniProtKB-KW
Biological Process regulation of mRNA splicing, via spliceosomeManual Assertion Based On ExperimentIDA:UniProtKB
Biological Process RNA processingManual Assertion Based On ExperimentTAS:ProtInc
Biological Process RNA splicingIEA:UniProtKB-KW

Cellular Location

Nucleus speckle
Concentrated in nuclear speckles (PubMed:8227358).
Colocalizes with the core spliceosomal snRNP proteins (PubMed:8227358).

PTM

Aryl sulfonamide anticancer drugs, such as indisulam (E7070) or E7820, promote ubiquitination and subsequent degradation by the DCX(DCAF15) complex (PubMed:31693891, PubMed:28437394, PubMed:28302793).
RBM39 degradation results in splicing defects and death in cancer cell lines (PubMed:31693891, PubMed:28437394, PubMed:28302793).
Aryl sulfonamide anticancer drugs change the substrate specificity of DCAF15 by acting as a molecular glue that promotes binding between DCAF15 and weak affinity interactor RBM39 (PubMed:31686031, PubMed:31819272).