||Contains Zn2+ and Mg2+. Nicotinoprotein methanol dehydrogenases have a tightly bound NADP+/NADPH cofactor that does not dissociate during the catalytic process. Instead, the cofactor is regenerated by a second substrate or electron carrier. While the in vivo electron acceptor is not known, N,N-dimethyl-4-nitrosoaniline (NDMA), which is reduced to 4-(hydroxylamino)-N,N-dimethylaniline, can serve this function in vitro. The enzyme has been detected in several Gram-positive methylotrophic bacteria, including Amycolatopsis methanolica, Rhodococcus rhodochrous and Rhodococcus erythropolis [1-3]. These enzymes are decameric, and possess a 5-fold symmetry . Some of the enzymes can also dismutate formaldehyde to methanol and formate .
||Vonck, J., Arfman, N., De Vries, G.E., Van Beeumen, J., Van Bruggen, E.F. and Dijkhuizen, L. Electron microscopic analysis and biochemical characterization of a novel methanol dehydrogenase from the thermotolerant Bacillus sp. C1. J. Biol. Chem. 266 (1991) 3949–3954. [PMID: 1995642]
||Van Ophem, P.W., Van Beeumen, J. and Duine, J.A. Nicotinoprotein [NAD(P)-containing] alcohol/aldehyde oxidoreductases. Purification and characterization of a novel type from Amycolatopsis methanolica. Eur. J. Biochem. 212 (1993) 819–826. [DOI] [PMID: 8385013]
||Bystrykh, L.V., Vonck, J., van Bruggen, E.F., van Beeumen, J., Samyn, B., Govorukhina, N.I., Arfman, N., Duine, J.A. and Dijkhuizen, L. Electron microscopic analysis and structural characterization of novel NADP(H)-containing methanol: N,N′-dimethyl-4-nitrosoaniline oxidoreductases from the gram-positive methylotrophic bacteria Amycolatopsis methanolica and Mycobacterium gastri MB19. J. Bacteriol. 175 (1993) 1814–1822. [DOI] [PMID: 8449887]
||Hektor, H.J., Kloosterman, H. and Dijkhuizen, L. Identification of a magnesium-dependent NAD(P)(H)-binding domain in the nicotinoprotein methanol dehydrogenase from Bacillus methanolicus. J. Biol. Chem. 277 (2002) 46966–46973. [DOI] [PMID: 12351635]
||Park, H., Lee, H., Ro, Y.T. and Kim, Y.M. Identification and functional characterization of a gene for the methanol : N,N′-dimethyl-4-nitrosoaniline oxidoreductase from Mycobacterium sp. strain JC1 (DSM 3803). Microbiology 156 (2010) 463–471. [DOI] [PMID: 19875438]