Reaction: reduced coenzyme F420 + methanophenazine = oxidized coenzyme F420 + dihydromethanophenazine
Glossary: methanophenazine = 2-{[(6E,10E,14E)-3,7,11,15,19-pentamethylicosa-6,10,14,18-tetraen-1-yl]oxy}phenazine
dihydromethanophenazine = 2-{[(6E,10E,14E)-3,7,11,15,19-pentamethylicosa-6,10,14,18-tetraen-1-yl]oxy}-5,10-dihydrophenazine
Other name(s): F420H2 dehydrogenase; fpoBCDIF (gene names)
Systematic name: reduced coenzyme F420:methanophenazine oxidoreductase
Comments: The enzyme, found in some methanogenic archaea, is responsible for the reoxidation of coenzyme F420, which is reduced during methanogenesis, and for the reduction of methanophenazine to dihydromethanophenazine, which is required by EC 1.8.98.1, dihydromethanophenazine:CoB-CoM heterodisulfide reductase. The enzyme is membrane-bound, and is coupled to proton translocation across the cytoplasmic membrane, generating a proton motive force that is used for ATP generation.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number:
References:
1. Brodersen, J., Gottschalk, G. and Deppenmeier, U. Membrane-bound F420H2-dependent heterodisulfide reduction in Methanococcus volta. Arch. Microbiol. 171 (1999) 115-121. [PMID: 9914308]
2. Baumer, S., Ide, T., Jacobi, C., Johann, A., Gottschalk, G. and Deppenmeier, U. The F420H2 dehydrogenase from Methanosarcina mazei is a Redox-driven proton pump closely related to NADH dehydrogenases. J. Biol. Chem. 275 (2000) 17968-17973. [PMID: 10751389]
3. Deppenmeier, U. The membrane-bound electron transport system of Methanosarcina species. J. Bioenerg. Biomembr. 36 (2004) 55-64. [PMID: 15168610]
4. Abken H. J. and Deppenmeier, U. Purification and properties of an F420H2 dehydrogenase from Methanosarcina mazei Gö1. FEMS Microbiol. Lett. 154 (2006) 231-237.