Heat-shock-induced proteins from Myxococcus xanthus.
Optimal conditions for two-dimensional gel electrophoresis of total cellular proteins from Myxococcus xanthus were established. Using these conditions, we analyzed protein patterns of heat-shocked M. xanthus cells. Eighteen major spots and 15 minor spots were found to be induced by heat shock. From N-terminal sequences of 15 major spots, DnaK, GroEL, GroES, alkyl hydroperoxide reductase, aldehyde dehydrogenase, succinyl coenzyme A (CoA) synthetase, 30S ribosomal protein S6, and ATP synthase alpha subunit were identified. Three of the 18 major spots had an identical N-terminal sequence, indicating that they may be different forms of the same protein. Although a DnaK homologue, SglK, has been identified in M. xanthus (R. M. Weimer, C. Creghton, A. Stassinopoulos, P. Youderian, and P. L. Hartzell, J. Bacteriol. 180:5357-5368, 1998; Z. Yang, Y. Geng, and W. Shi, J. Bacteriol. 180:218-224, 1998), SglK was not induced by heat shock. In addition, there were seven substitutions within the N-terminal 30-residue sequence of the newly identified DnaK. This is the first report to demonstrate that succinyl CoA synthetase, 30S ribosomal protein S6, and ATP synthase alpha subunit are heat shock inducible.
Otani
M
M
Faculty of Pharmaceutical Sciences, Kobe-Gakuin University, Nishi-ku, Kobe 651-2180, Japan.
Tabata
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Ueki
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Sano
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Inouye
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D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000096:biosynthesis*; D015180:Electrophoresis, Gel, Two-Dimensional / Q000379:methods; D006360:Heat-Shock Proteins / Q000096:biosynthesis*; D018869:Heat-Shock Response; D008969:Molecular Sequence Data; D016941:Myxococcus xanthus / Q000378:metabolism*; D006180:Proton-Translocating ATPases / Q000096:biosynthesis; D038601:Ribosomal Protein S6; D012269:Ribosomal Proteins / Q000096:biosynthesis; D017386:Sequence Homology, Amino Acid; D013389:Succinate-CoA Ligases / Q000096:biosynthesis
D001426:Bacterial Proteins; D006360:Heat-Shock Proteins; D038601:Ribosomal Protein S6; D012269:Ribosomal Proteins; D006180:Proton-Translocating ATPases; D013389:Succinate-CoA Ligases