Nature Communications (Jan 2021)
Heme-binding enables allosteric modulation in an ancient TIM-barrel glycosidase
Abstract
Family 1 glycosidases (GH1) are present in the three domains of life and share classical TIM-barrel fold. Structural and biochemical analyses of a resurrected ancestral GH1 enzyme reveal heme binding, not known in its modern descendants. Heme rigidifies the TIM-barrel and allosterically enhances catalysis.