<p>This domain has a beta-grasp fold with a core structure consisting of beta(2)-alpha-beta(2), which is similar to that found in ubiquitin [<cite idref="PUB00034476"/>]. Domains with this type of structure are found in the 2Fe-2S ferredoxin family (including putidaredoxin and adrenodoxin) [<cite idref="PUB00016348"/>], the 2Fe-2S ferredoxin-related family (including aldehyde reductase, and xanthine dehydrogenase) [<cite idref="PUB00022831"/>], the TGS family (including threonyl-tRNA synthetase) [<cite idref="PUB00006444"/>] and the MoaD/ThiS family (including molybdopterin, and thiamine biosynthesis sulphur carrier protein) [<cite idref="PUB00034477"/>].</p>