RNA-binding protein 20

UniProtKB accession:  Q3UQS8

Grouped By:  Matching UniProtKB accession

UniProtKB description:  RNA-binding protein that acts as a regulator of mRNA splicing of a subset of genes encoding key structural proteins involved in cardiac development, such as TTN (Titin), CACNA1C, CAMK2D or PDLIM5/ENH (PubMed:22466703, PubMed:24584570, PubMed:27630136, PubMed:29650543, PubMed:29895960, PubMed:33110103, PubMed:35394688, PubMed:35041844). Acts as a repressor of mRNA splicing: specifically binds the 5'UCUU-3' motif that is predominantly found within intronic sequences of pre-mRNAs, leading to the exclusion of specific exons in target transcripts (PubMed:32187365). RBM20-mediated exon skipping is hormone-dependent and is essential for TTN isoform transition in both cardiac and skeletal muscles (PubMed:27630136, PubMed:29895960, PubMed:33110103, PubMed:35041844). RBM20-mediated exon skipping of TTN provides substrates for the formation of circular RNA (circRNAs) from the TTN transcripts (PubMed:37272356). Together with RBM24, promotes the expression of short isoforms of PDLIM5/ENH in cardiomyocytes (By similarity).