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β-Fructosidase superfamily: Homology with some α-L-arabinases and β-D-xylosidases

✍ Scribed by Daniil G. Naumoff

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 503 KB
Volume: 42
Category: Article
ISSN: 0887-3585
DOI: 10.1002/1097-0134(20010101)42:1<66::aid-prot70>3.0.co;2-4

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✦ Synopsis

Comparison of the amino acid sequences of four families of glycosyl hydrolases reveals that they are homologous and have several common conserved regions. Two of these families contain ␤-fructosidases (glycosyl hydrolase families GH32 and GH68) and the other two include ␣-Larabinases and ␤-xylosidases (families GH43 and GH62). The latter two families are proposed to be grouped together with the former two into the ␤-fructosidase (furanosidase) superfamily. Several ORFs can be considered as a fifth family of the superfamily on the basis of sequence similarity. It is shown for the first time that a glycosyl hydrolase superfamily can include enzymes with both inversion and retention mechanism of action. Composition of the active center for enzymes of the superfamily is discussed. Proteins 2001;42:66 -76.

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