Part of the ABC transporter complex MetNPQ involved in methionine import (PubMed:14990259). Responsible for energy coupling to the transport system (Probable). It has also been shown to be involved in methionine sulfoxide transport (PubMed:14990259). ATP + H2O + L-methionine(out) = ADP + H(+) + L-methionine(in) + phosphate ATP + D-methionine(out) + H2O = ADP + D-methionine(in) + H(+) + phosphate The complex is composed of two ATP-binding proteins (MetN), two transmembrane proteins (MetP) and a solute-binding protein (MetQ). Repressed by methionine via the S-box system. Belongs to the ABC transporter superfamily. Methionine importer (TC 3.A.1.24) family.