Dehydrogenase E1 and transketolase domain-containing protein 1 (DHTKD1); A Target Enabling Package

Inherited mutations of the GCDH gene for glutaryl-CoA dehydrogenase, catalysing the sixth enzymatic step in lysine catabolism, lead to the rare neurometabolic disorder Glutaric Aciduria type 1 (GA1). There is a rationale that inhibition of the fifth lysine catabolising step, catalysed by the DHTKD1 enzyme, could provide therapeutic benefit for GA1 by means of substrate reduction. This TEP provides early tools to develop DHTKD1 inhibitors, including recombinant protein, structure, biophysical (activity and stability) assays and fragment hits of human DHTKD1. This work also reports the interaction of DHTKD1 with its functional partner DLST as a binary complex, and an EM reconstruction of the DLST catalytic core.