posted on 2023-02-24, 09:13authored byAhmed Djeghader, Melanie Rossotti, Saleh Abdulkarim, Frederic Biaso, Guillaume Gerbaud, Wolfgang Nitschke, Barbara Schoepp-Cothenet, Tewfik SoulimaneTewfik Soulimane, Stephane Grimaldi
By combining X-ray crystallography, electron paramagnetic resonance techniques and density functional theory-based modelling, we provide evidence for a direct coordination of the product analogue, phosphate, to the molybdenum active site of a sulfite dehydrogenase.This interaction is mimicking the still experimentally uncharacterized reaction intermediate proposed to arise during the catalytic cycle of this class of enzymes. This work opens new perspectives for further deciphering the reaction mechanism of this nearly ubiquitous class of oxidoreductases