Journal
CYTOSKELETON
Volume 69, Issue 10, Pages 686-699Publisher
WILEY
DOI: 10.1002/cm.21044
Keywords
septation initiation network (SIN); cytokinesis; mitosis; spindle pole body (SPB); S. pombe
Categories
Funding
- Cellular, Biochemical, and Molecular Sciences training program, NIH [T32 GM08554]
- NIH [GM058406]
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Mitotic exit and cell division must be spatially and temporally integrated to facilitate equal division of genetic material between daughter cells. In the fission yeast, Schizosaccharomyces pombe, a spindle pole body (SPB) localized signaling cascade termed the septation initiation network (SIN) couples mitotic exit with cytokinesis. The SIN is controlled at many levels to ensure that cytokinesis is executed once per cell cycle and only after cells segregate their DNA. An interesting facet of the SIN is that its activity is asymmetric on the two SPBs during anaphase; however, how and why the SIN is asymmetric has remained elusive. Many key factors controlling SIN asymmetry have now been identified, shedding light on the significance of SIN asymmetry in regulating cytokinesis. In this review, we highlight recent advances in our understanding of SIN regulation, with an emphasis on how SIN asymmetry is achieved and how this aspect of SIN regulation fine-tunes cytokinesis. (c) 2012 Wiley Periodicals, Inc
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