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Journal of Bacteriology, February 2001, p. 1140-1146, Vol. 183, No. 4
Department of Life Sciences, Faculty of
Agriculture, Kagawa University, Miki-cho, Kagawa, Japan 761-0795
Received 12 June 2000/Accepted 22 November 2000
A gene, mokA, encoding a protein with similarities to
histidine kinase-response regulator hybrid sensor, was cloned from a Myxococcus xanthus genomic library. The predicted
mokA gene product was found to contain three domains: an
amino-terminal input domain, a central transmitter domain, and a
carboxy-terminal receiver domain. mokA mutants placed under
starvation conditions exhibited reduced sporulation. Mutation of
mokA also caused marked growth retardation at high
osmolarity. These results indicated that M. xanthus MokA is
likely a transmembrane sensor that is required for development and
osmotic tolerance. The putative function of MokA is similar to that of
the hybrid histidine kinase, DokA, of the eukaryotic slime mold
Dictyostelium discoideum.
0021-9193/01/$04.00+0 DOI: 10.1128/JB.183.4.1140-1146.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Myxococcus xanthus mokA Encodes a Histidine
Kinase-Response Regulator Hybrid Sensor Required for Development
and Osmotic Tolerance
*
Corresponding author. Mailing address: Department of
Life Sciences, Faculty of Agriculture, Kagawa University, Miki-cho,
Kagawa, Japan, 761-0795. Phone: 81-87-891-3118. Fax: 81-87-891-3021. E-mail: kimura{at}ag.kagawa-u.ac.jp.
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