MreD is a [SW|cell shape] determining protein, it couples the cytosolic [[protein|A4C8719E06F774A6EB4D79757CC79CF89E453A54]] and [[protein|A4C8719E06F774A6EB4D79757CC79CF89E453A54]]-like proteins to the extracellular peptidoglycan-synthesizing machinery, part of the [[protein|Rod complex]] for lateral [SW|cell wall synthesis] and control of cell diameter