Metallopeptidase that hydrolyzes the Cys-Gly bond of Cys-Gly-S-conjugates (PubMed:18515361). Involved in the formation of the human body odorant 3-methyl-3-sulfanylhexan-1-ol (3M3SH) from odorless axilla secretions. Catalyzes the hydrolysis of the Cys-Gly bond of the Cys-Gly-S-conjugate of 3M3SH, a key precursor secreted by apocrine glands in human axilla skin. The Cys-S-conjugate obtained is then cleaved by the Cys-S-conjugate beta-lyase MetC, which finally releases 3M3SH (PubMed:18515361). an S-substituted L-cysteinylglycine + H2O = an S-substituted L-cysteine + glycine H2O + S-(1-hydroxy-3-methylhexan-3-yl)-L-cysteinylglycine = glycine + S-(1-hydroxy-3-methylhexan-3-yl)-L-cysteine H2O + S-benzyl-L-cysteinylglycine = glycine + S-benzyl-L-cysteine Belongs to the peptidase M20F family.