This TIM alpha/beta barrel structure is found in xylose isomerase (Swiss:P19148) and in endonuclease IV (Swiss:P12638, EC:3.1.21.2). This domain is also found in the N termini of bacterial myo-inositol catabolism proteins. These are involved in the ...
This TIM alpha/beta barrel structure is found in xylose isomerase (Swiss:P19148) and in endonuclease IV (Swiss:P12638, EC:3.1.21.2). This domain is also found in the N termini of bacterial myo-inositol catabolism proteins. These are involved in the myo-inositol catabolism pathway, and is required for growth on myo-inositol in Rhizobium leguminosarum bv. viciae [1].
Xylose isomerase catalyses the interconvertion of D-xylose and D-xylulose. It contains two divalent metal ions, preferably magnesium, located at different metal-binding sites within the active site. The enzyme catalyses the interconversion of aldose and ketose sugars with broad substrate specificity. The enzyme binds the closed form of its sugar substrate (in the case of glucose, only the alpha anomer) and catalyses ring opening to generate a form of open-chain conformation that is coordinated to one of the metal sites.
Defined by 11 residues: HIS:A-53ASP:A-56MET:A-87GLU:A-180LYS:A-182GLU:A-216HIS:A-219ASP:A-244ASP:A-254ASP:A-256ASP:A-292