RNA binding protein that regulates the expression of target mRNAs at the translation level. May play a role in the proliferation and maintenance of stem cells in the central nervous system (By similarity). Associated with polysomes. Ubiquitous; detected at low levels. Up-regulated in astrocytes after brain injury. Phosphorylated. Chromosomal aberrations involving MSI2 may contribute to disease progression in chronic myeloid leukemia. Translocation t(7;17)(p15;q23) with HOXA9; translocation t(7;17)(q32-34;q23). Belongs to the Musashi family.