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J. Bacteriol., Jan 1997, 287-289, Vol 179, No. 1
Copyright © 1997, American Society for Microbiology

Phosphorylating and dephosphorylating protein complexes in bacterial chemotaxis

H Wang and P Matsumura
Department of Microbiology and Immunology, University of Illinois at Chicago, 60612-7344, USA.

During optimal motility conditions, a 1:1 stoichiometry of CheA(L) (654 amino acids) to CheA(S) (557 amino acids) was determined. It was also found that CheZ binding to CheA(S) was inhibited by CheA(L)-CheA(S)- CheW interaction. This suggests that CheA(S) has different functions in the phosphorylating complex (CheA(L)-CheA(S)-CheW) and in the dephosphorylating complex (CheA(S)-CheZ).


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