This domain is found in Aldos-2-ulose dehydratase from Phanerodontia chrysosporium (AUDH) and similar sequences from invertebrates and fungi. AUDH is a bifunctional enzyme which catalyses the dehydration of anhydrofructose into ascopyrone M, and the ...
This domain is found in Aldos-2-ulose dehydratase from Phanerodontia chrysosporium (AUDH) and similar sequences from invertebrates and fungi. AUDH is a bifunctional enzyme which catalyses the dehydration of anhydrofructose into ascopyrone M, and the isomerisation of ascopyrone M into microthecin. It is organised into three domains: an N-terminal domain with a beta-propeller fold (this entry), a middle domain containing two cupin folds (Pfam:PF18637) and a C-terminal lectin domain. This domain folds into a seven-bladed beta-propeller, where each blade is made up of a four-stranded, antiparallel beta-sheet [1].
Aldos-2-ulose dehydratase/isomerase (AUDH) Cupin domain
The enzyme aldos-2-ulose dehydratase/isomerase (AUDH) participates in carbohydrate secondary metabolism, catalyzing the conversion of glucosone and 1,5-d-anhydrofructose to the secondary metabolites cortalcerone and microthecin, respectively. Crystal ...
The enzyme aldos-2-ulose dehydratase/isomerase (AUDH) participates in carbohydrate secondary metabolism, catalyzing the conversion of glucosone and 1,5-d-anhydrofructose to the secondary metabolites cortalcerone and microthecin, respectively. Crystal structure analysis revealed that the enzyme subunit is built up of three domains, an N-terminal seven-bladed propeller, a bicupin and a C-terminal lectin domain. This entry describes the second Cupin domain (residues 574-739) composed of two antiparallel sheets that build up the jellyroll sandwich fold formed from four and five beta-strands. This cupin domain in AUDH is found to contain a zinc binding site where the metal site is located at the bottom of the cleft formed by the beta-sandwich, as observed in many cupins [1].
