[1] Proteomic analyses reveal divergent ubiquitylation site patterns in murine tissues. Wagner SA, Beli P, Weinert BT, Schölz C, Kelstrup CD, Young C, Nielsen ML, Olsen JV, Brakebusch C, Choudhary C. Mol Cell Proteomics. 2012 Dec;11(12):1578-85. [PMID: 22790023]
Functional Description
RNA-binding protein that plays a central role in myelinization. Also required for visceral endoderm function and blood vessel development. Binds to the 5'-NACUAAY-N(1,20)-UAAY-3' RNA core sequence. Acts by regulating pre-mRNA splicing, mRNA export, mRNA stability and protein translation, as well as cellular processes including apoptosis, cell cycle, glial cell fate and development. Required to protect and promote stability of mRNAs such as MBP and CDKN1B which promotes oligodendrocyte differentiation. Participates in mRNA transport by regulating the nuclear export of MBP mRNA. Isoform 1 is involved in regulation of mRNA splicing of MAG pre-mRNA by acting as a negative regulator of MAG exon 12 alternative splicing. Isoform 3 can induce apoptosis, while heterodimerization with other isoforms results in nuclear translocation of isoform 3 and suppression of apoptosis. Isoform 4 acts as a translational repressor for GLI1. May also play a role in smooth muscle development.