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Epitomics: The Rabbit Monoclonal Company
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Published online April 7, 2008
doi:10.1083/jcb.200803064
The Journal of Cell Biology, Vol. 181, No. 1, 15-18
The Rockefeller University Press, 0021-9525 $30.00
© 2008 Valiathan et al.
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 Pushing for answers: is myosin V directly involved in moving mitochondria?

Rajeshwari R. Valiathan and Lois S. Weisman

Department of Cell and Developmental Biology, Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109

Correspondence to L.S. Weisman: lweisman{at}umich.edu

In budding yeast, the actin-based class V myosin motors, Myo2 and Myo4, transport virtually all organelles from mother to bud during cell division. Until recently, it appeared that mitochondria may be an exception, with studies showing that the Arp2/3 complex is required for their movement. However, several recent studies have proposed that Myo2 has a direct involvement in mitochondria inheritance. In this issue, Altmann et al. (Altmann, K., M. Frank, D. Neumann, S. Jakobs, and B. Westermann. 2008. J. Cell Biol. 181:119–130) provide the strongest support yet that Myo2 and its associated light chain Mlc1 function directly and significantly in both mitochondria–actin interactions and in the movement of mitochondria from mother to bud. The conflicting functions of Arp 2/3 and Myo2 may be reconciled by the existence of multiple pathways involved in mitochondrial transport.


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Related Article

The class V myosin motor protein, Myo2, plays a major role in mitochondrial motility in Saccharomyces cerevisiae
Katrin Altmann, Martina Frank, Daniel Neumann, Stefan Jakobs, and Benedikt Westermann
J. Cell Biol. 2008 181: 119-130. [Abstract] [Full Text] [PDF]





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