RNA-binding protein Musashi homolog 1, Musashi-1, MSI1.
RNA binding protein that regulates the expression of target mRNAs at the translation level. Regulates expression of the NOTCH1 antagonist NUMB. Binds RNA containing the sequence 5-GUUAGUUAGUUAGUU-3 and other sequences containing the pattern 5-[GA]U(1-3)AGU-3. May play a role in the proliferation and maintenance of stem cells in the central nervous system.