Glycoside Hydrolase Family 27

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Glycoside Hydrolase Family GH27
Clan	GH-D
Mechanism	retaining
Active site residues	known
CAZy DB link
http://www.cazy.org/fam/GH27.html

Family Firsts

First sterochemistry determination

Retention of anomeric stereochemistry demonstrated by H-1 NMR for the main alpha-galactosidase from the white-rot fungus Phanerochaete chrysosporium [1].

First catalytic nucleophile identification

Phanerochaete chrysosporium alpha-galactosidase by mechanism-based labelling with 2',4',6'-trinitrophenyl 2-deoxy-2,2-difluoro-alpha-D-lyxo-hexopyranoside ("2,2-difluoro-alpha-galactosyl picrate"), pepsin digestion, and mass spectrometry [2].

First general acid/base residue identification

Chicken (Gallus gallus) N-acetylgalactosaminidase by X-ray structural analysis of an enzyme-N-acetylgalactosamine complex [3].

First 3-D structure

Chicken N-acetylgalactosaminidase, both free enzyme and in complex with N-acetylgalactosamine [3].

References

1. Brumer H 3rd, Sims PF, and Sinnott ML. (1999). Lignocellulose degradation by Phanerochaete chrysosporium: purification and characterization of the main alpha-galactosidase. Biochem J. 1999;339 ( Pt 1)(Pt 1):43-53. | Google Books | Open Library
2. Hart DO, He S, Chany CJ 2nd, Withers SG, Sims PF, Sinnott ML, and Brumer H 3rd. (2000). Identification of Asp-130 as the catalytic nucleophile in the main alpha-galactosidase from Phanerochaete chrysosporium, a family 27 glycosyl hydrolase. Biochemistry. 2000;39(32):9826-36. DOI:10.1021/bi0008074 |