Involved in formation and maintenance of cell shape, probably part of the elongasome which synthesizes peripheral peptidogylcan (PG). Homodimer (Probable). Interacts with a number of proteins in the elongasome, including PBP1a (pbpA), PBP1b, PBP2a, PBP2b (penA), StkP, MltG, MreD and RodZ (PubMed:28710862). Deletion of the C-terminus (residues 183-272, CTD) suppresses activating mutations in khpB (also called eloR/jag); the deletion no longer interacts with MreD and interacts less efficiently with PBP1b and StkP, CTD deletion leads to increased phosphorylation of KhpB. Cell shape does not change, cells start autolysing earlier. Neither PBP2b (penA) nor rodA can be deleted when this gene is absent. Belongs to the MreC family.