This enzyme family is involved in formation of methane from carbon dioxide EC:1.5.99.9. The enzyme requires coenzyme F420 [1].

1: Cloning, sequencing, and transcriptional analysis of the coenzyme F420- dependent methylene-5,6,7,8-tetrahydromethanopterin dehydrogenase gene from Methanobacterium thermoautotrophicum strain Marburg and functional expression in Escherichia coli. Mukhopadhyay B, Purwantini E, Pihl TD, Reeve JN, Daniels L; J Biol Chem 1995;270:2827-2832. PMID:7852356