InterPro domain: IPR003149

This family represents the small subunit of the Fe-only hydrogenases ( 1.18.99.1 ). The subunit is comprised of alternating random coil and alpha helical structures that encompasses the large subunit in a novel protein fold [ 1 ].

1. Desulfovibrio desulfuricans iron hydrogenase: the structure shows unusual coordination to an active site Fe binuclear center. Structure 7, 13-23