Background
MBNL2 mediates pre-mRNA alternative splicing regulation. It acts either as activator or repressor of splicing on specific pre-mRNA targets. It inhibits cardiac troponin-T (TNNT2) pre-mRNA exon inclusion but induces insulin receptor (IR) pre-mRNA exon inclusion in muscle. It antagonizes the alternative splicing activity pattern of CELF proteins. It is an RNA-binding protein that binds to 5'ACACCC-3' core sequence within the 3'UTR of ITGA3. It binds to CUG triplet repeat expansion in myotonic dystrophy muscle cells by sequestering the target RNAs.
Cellular location
Nucleus, Cytoplasm