cheB3 CHEB3_RHOSH MTTHAAAPSTRVLIVDDSAAARAMFKVIVESDPALQVMAAVPDAFAAARAMRTELPDVILLDLELPSMDGLTFLRKIMQQHPIPVVVCSSHVGAGTEAMVSALELGAREVISKPAARNDLERQEASIRICDAIRAATETTRRRSQPEPRPLAPGPKLTADEILPARPPRPVPETMPVVCIGASTGGTEALRDVLTALPASAPPIVIVQHMPRGFTAAFARRLDSLCAIEVLEAEDEMQVMPGRAIIAQGDRHLLLRRRNQGYRVSVLDGAYVCRHRPSVDVLFRSAAQEAGGNALGVIMTGMGDDGARCMAEMRAAGAETIAQNEESCVVYGMPREAVAHGGVGKVEPLDRLAARIMEFGRRHTERTVR Chemotaxis response regulator protein-glutamate methylesterase of group 3 operon 369 Involved in the modulation of the chemotaxis system; catalyzes the demethylation of specific methylglutamate residues introduced into the chemoreceptors (methyl-accepting chemotaxis proteins) by CheR (By similarity). Part of the second chemotactic pathway (cheOp2); there are 3 operons encoding multiple homologs of the chemosensory proteins in R.sphaeroides. This protein is essential for chemotaxis, and is able to partially complement an E.coli cheB deletion mutant. cheB1