Members of this protein family are 5,10-methylenetetrahydromethanopterin reductase, an F420-dependent enzyme of methanogenesis. It is restricted to the Archaea.
Shima S, Warkentin E, Grabarse W, Sordel M, Wicke M, Thauer RK, Ermler U.
Structure of coenzyme F(420) dependent methylenetetrahydromethanopterin reductase from two methanogenic archaea.
J. Mol. Biol. 300 2000 935-50
[PubMed: 10891279] http://dx.doi.org/10.1006/jmbi.2000.3909