1.2.7.B2	Calcium	contains approximately 1 W atom, 4 Fe atoms, and 1 Ca atom per subunit	644689	
1.2.7.B2	Iron	an electron transfer pathway is proposed that begins at the tungsten center, leads to the (4Fe-4S) cluster of formaldehyde ferredoxin oxidoreductase via one of the two pterins that coordinate the tungsten, and ends at the (4Fe-4S) cluster of ferredoxin. This pathway includes two residues that coordinate the (4Fe-4S) clusters, Cys287 of FOR and Asp14 of ferredoxin	644690	
1.2.7.B2	Iron	contains approximately 1 W atom, 4 Fe atoms, and 1 Ca atom per subunit	644689	
1.2.7.B2	Iron	contains one [4Fe-4S] cubane per 69000 Da subunit	674933	
1.2.7.B2	Iron	enzyme contains an [Fe4S4]+ cluster	722824	
1.2.7.B2	Iron	the enzyme contains 16.0 gatom of iron per 280000 Da g of enzyme. Each subunit of dithionite reduced enzyme contains a magnetically isolated [4Fe-4S]1+ cluster that exists in both the S = 3/2 and S = 1/2 states	644682	
1.2.7.B2	Mo5+	molybdenum can be incorporated, Mo(V) signal is observed in electron paramagnetic resonance. Aldehyde oxidation activity correlates only with the residual tungsten content. This suggests that the Mo-containing enzymes are most likely inactive. An intracellular selection mechanism for tungstate and molybdate processing has to be present, since tungsten is found to be preferentially incorporated even under conditions with comparable intracellular concentrations of tungstate and molybdate	745210	
1.2.7.B2	Tungsten	a W(VI) species with terminal sulfido or thiol ligands is proposed to be responsible for the catalytic activity in sulfide-activated samples of formaldehyde ferredoxin oxidoreductase	722824	
1.2.7.B2	Tungsten	an electron transfer pathway is proposed that begins at the tungsten center, leads to the (4Fe-4S) cluster of formaldehyde ferredoxin oxidoreductase via one of the two pterins that coordinate the tungsten, and ends at the (4Fe-4S) cluster of ferredoxin. This pathway includes two residues that coordinate the (4Fe-4S) clusters, Cys287 of FOR and Asp14 of ferredoxin	644690	
1.2.7.B2	Tungsten	contains one tungstodipterin per 69000 Da subunit	674933	
1.2.7.B2	Tungsten	the enzyme from Pyrococcus furiosus uses exclusively tungsten to synthesize the catalytically active forms of formaldehyde ferredoxin oxidoreductase and active molybdenum- or vanadium-containing isoenzymes are not expressed when the cells are grown in the presence of these other metals	722490	
1.2.7.B2	Tungsten	the tungsten in the active enzyme is a two-electron acceptor, W(VI/IV)	674933	
1.2.7.B2	Tungsten	tungsten-containing enzyme. The enzyme contains 3.3 gatom of tungsten per 280000 Da g of enzyme	644682	
1.2.7.B2	Tungsten	tungsten-containing enzyme. The enzyme contains approximately 1 W atom, 4 Fe atoms, and 1 Ca atom per subunit	644689	
1.2.7.B2	Tungsten	tungsten-containing protein	723098	
1.2.7.B2	Tungsten	tungsten-dependent enzyme, no activity when tungsten is replaced by molybdenum	722823	
1.2.7.B2	Tungsten	tungsten-dependent enzyme. A mechanism is proposed in which the formaldehyde substrate binds directly to the tungsten ion. W(VI)=O then performs a nucleophilic attack on the formaldehyde carbon to form a tetrahedral intermediate. In the second step, which is calculated to be rate limiting, a proton is transferred to the second-shell Glu308 residue, coupled with a two-electron reduction of the tungsten ion	722893	
1.2.7.B2	Tungsten	tungstoenzyme	644684