Involved in the transmission of sensory signals from the chemoreceptors to the flagellar motors. Chemotaxis involves both a phosphorylation-dependent excitation and a methylation-dependent adaptation. CheV and CheW are involved in the coupling of the methyl-accepting chemoreceptors to the central two-component kinase CheA; they are both necessary for efficient chemotaxis. Moreover, CheA-dependent phosphorylation of CheV is required for adaptation to attractants during B.subtilis chemotaxis. Peak expression is seen in early stationary phase. Consists of two domains: an N-terminal CheW-like coupling domain and a C-terminal two-component receiver domain. Phosphorylated by CheA. Cells lacking CheV are somewhat reduced in chemotactic proficiency, but a double mutant lacking both CheV and CheW has a strong tumble bias, does not respond to addition of attractant, shows essentially no accumulation in capillary assays, and has greatly reduced methyl turnover on the methyl-accepting chemotaxis proteins (MCPs).