A protein complex consisting of four polypeptides which also contains tungsten, a molybdopterin guanine dinucleotide, and iron-sulfur clusters. This protein complex catalyzes the reversible conversion of CO2 and methanofuran to formylmethanofuran during methanogenesis.
Source:
GOC:mengo_curators,
PMID:8575452,
PMID:8125106