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Commentary |
1 Department of Physiology, Keio University School of Medicine, 35 Shinanomachi,
Shinjuku-ku, Tokyo 160-8582, Japan
2 Department of Developmental Genetics, National Institute of Genetics, and
Department of Genetics, Graduate University for Advanced Studies, 1111 Yata,
Mishima, Shizuoka 411-8540, Japan
* Author for correspondence hidokano{at}sc.itc.keio.ac.jp
Transcription is thought to have a major role in the regulation of cell fate; the importance of translational regulation in this process has been less certain. Recent findings demonstrate that translational regulation contributes to cell-fate specification. The evolutionarily conserved, neural RNA-binding protein Musashi, for example, controls neural cell fate. The protein functions in maintenance of the stem-cell state, differentiation, and tumorigenesis by repressing translation of particular mRNAs. In mammals it might play an important role in activating Notch signalling by repressing translation of the Notch inhibitor m-Numb.
Key words: Translational regulation, Cell fate, Musashi, RNA-binding protein, Asymmetric cell division, Neural stem cell, Notch signaling
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