This family consists of several bacterial methylamine utilisation MauE proteins. Synthesis of enzymes involved in methylamine oxidation via methylamine dehydrogenase (MADH) is encoded by genes present in the mau cluster. MauE and MauD are specifically involved in the processing, transport, and/or maturation of the beta-subunit and that the absence of each of these proteins leads to production of a non-functional beta-subunit which becomes rapidly degraded [1].

1: MauE and MauD proteins are essential in methylamine metabolism of Paracoccus denitrificans. van der Palen CJ, Reijnders WN, de Vries S, Duine JA, van Spanning RJ; Antonie Van Leeuwenhoek 1997;72:219-228. PMID:9403107