Chemotaxis response regulator protein-glutamate methylesterase of group 2 operon 366 CHEB2_RHOSH Part of the third chemotactic pathway (cheOp3); there are 3 operons encoding multiple homologs of the chemosensory proteins in R.sphaeroides. This locus, and cheB2, are essential for chemotaxis. CheB2 is not involved in phototaxis signaling. This protein is able to partially complement an E.coli cheB deletion mutant. MKAAADRLMAARAREGRTRVLIVDDSAMVRQALALGLSTDPRLEVVGTASGAEAARAQMAALKPDVVTLDLEMPQMDGLTFLRSYMESAPVPTVVISSLTRTSGETAMRAMEAGAVDIISKPSLGAGQGLPAIMRDVCARVWAAARARLALPDGAAPAPVAPGASEDWIHALGASTGGVQALSRILPFFPAQSPGLLVVQHMPEGFTAAFARRLDALCRMRVREAADGDLVLPGLVLIAPGGLRHMEIERAGGVCRVRLVAGAPVSYSRPSVDRMFLSLAAAAGPRVSAALLTGMGRDGAAGLLAIRRAGGRTFAQDEGSSAVFGMPLAARDLRAAEEILTLDDIPARMMLAAAADTRAPSLASND cheB2 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).