Journal
CELL
Volume 146, Issue 3, Pages 396-407Publisher
CELL PRESS
DOI: 10.1016/j.cell.2011.06.042
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Funding
- National Institutes of Health [GM29764]
- Industrial Macromolecular Crystallography Association
- Hauptman-Woodward Medical Research Institute
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- NIH, National Center for Research Resources [P20 RR-17708]
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In E. coli, MinD recruits MinE to the membrane, leading to a coupled oscillation required for spatial regulation of the cytokinetic Z ring. How these proteins interact, however, is not clear because the MinD-binding regions of MinE are sequestered within a six-stranded beta sheet and masked by N-terminal helices. minE mutations that restore interaction between some MinD and MinE mutants were isolated. These mutations alter the MinE structure leading to release of the MinD-binding regions and the N-terminal helices that bind the membrane. Crystallization of MinD-MinE complexes revealed a four-stranded beta sheet MinE dimer with the released beta strands (MinD-binding regions) converted to alpha helices bound to MinD dimers. These results identify the MinD-dependent conformational changes in MinE that convert it from a latent to an active form and lead to a model of how MinE persists at the MinD-membrane surface.
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