FEATURES

DESCRIPTION

Also known as RBM4_HUMAN, RBM4, RBM4A. RNA-binding factor involved in multiple aspects of cellular processes like alternative splicing of pre-mRNA and translation regulation. Modulates alternative 5'-splice site and exon selection. Acts as a muscle cell differentiation-promoting factor. Activates exon skipping of the PTB pre-mRNA during muscle cell differentiation. Antagonizes the activity of the splicing factor PTBP1 to modulate muscle cell-specific exon selection of alpha tropomyosin. Binds to intronic pyrimidine-rich sequence of the TPM1 and MAPT pre-mRNAs. Required for the translational activation of PER1 mRNA in response to circadian clock. Binds directly to the 3'-UTR of the PER1 mRNA. Exerts a suppressive activity on Cap-dependent translation via binding to CU-rich responsive elements within the 3'UTR of mRNAs, a process increased under stress conditions or during myocytes differentiation. Recruits EIF4A1 to stimulate IRES-dependent translation initiation in respons to cellular stress. Associates to internal ribosome entry segment (IRES) in target mRNA species under stress conditions. Plays a role for miRNA-guided RNA cleavage and translation suppression by promoting association of AGO2-containing miRNPs with their cognate target mRNAs. Associates with miRNAs during muscle cell differentiation. Binds preferentially to 5'-CGCGCG[GCA]-3' motif in vitro. Interacts with TNPO3; the interaction mediates nuclear import of the protein and is disrupted by nuclear Ran bound to GTP. Interacts with EIF4G1 and WT1. Interacts with EIF4A1; the interaction is modulated under stress-induced conditions. Interacts with AGO1. Interacts with AGO2; the interaction occurs under both cell proliferation and differentiation conditions and in an RNA- and phosphorylation-independent manner. Interacts with DDX5; the interaction occurs in an RNA-independent manner.

EXTERNAL LINKS

RBM4

RNA-binding protein 4

RBM4

Molecular Synopsis