Aldehyde ferredoxin oxidoreductase (AOR) catalyzes the reversible oxidation of aldehydes to their corresponding carboxylic acids with their accompanying reduction of the redox protein ferredoxin. This family is composed of two structural domains that bind the tungsten cofactor via DXXGL(C/D) motifs. In addition to maintaining specific binding interactions with the cofactor, another role for domains 2 and 3 may be to regulate substrate access to AOR.
Lu S et al.(2020). "CDD/SPARCLE: the conserved domain database in 2020.",