Glycoside Hydrolase Family 63

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• Author: ^^^Takashi Tonozuka^^^
• Responsible Curator: ^^^Takashi Tonozuka^^^

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Glycoside Hydrolase Family GH63
Clan	GH-G
Mechanism	inverting
Active site residues	not known
CAZy DB link
http://www.cazy.org/GH63.html

Substrate specificities

Glycoside hydrolases of this family are exo-acting inverting enzymes. The most commonly characterized activity of the eukaryotic enzymes is processing α-glucosidase I (EC 3.2.1.106), which specifically hydrolyzes the terminal α-1,2-glucosidic linkage in the N-linked oligosacharide precursor, Glc₃Man₉GlcNAc₂. The enzymatic properties of Cwh41p, a processing α glucosidase I from Saccharomyces cerevisiae, has been most intensively studied.

This is an example of how to make references to a journal article [1]. (See the References section below). Multiple references can go in the same place like this [1, 2]. You can even cite books using just the ISBN [3]. References that are not in PubMed can be typed in by hand [4].

Kinetics and Mechanism

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Catalytic Residues

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Three-dimensional structures

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Family Firsts

First stereochemistry determination

Cite some reference here, with a short (1-2 sentence) explanation [1].

First catalytic nucleophile identification

Cite some reference here, with a short (1-2 sentence) explanation [4].

First general acid/base residue identification

Cite some reference here, with a short (1-2 sentence) explanation [2].

First 3-D structure

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References

1. Comfort DA, Bobrov KS, Ivanen DR, Shabalin KA, Harris JM, Kulminskaya AA, Brumer H, and Kelly RM. (2007). Biochemical analysis of Thermotoga maritima GH36 alpha-galactosidase (TmGalA) confirms the mechanistic commonality of clan GH-D glycoside hydrolases. Biochemistry. 2007;46(11):3319-30. DOI:10.1021/bi061521n |
2. He S and Withers SG. (1997). Assignment of sweet almond beta-glucosidase as a family 1 glycosidase and identification of its active site nucleophile. J Biol Chem. 1997;272(40):24864-7. DOI:10.1074/jbc.272.40.24864 |
3. Robert V. Stick and Spencer J. Williams. (2009) Carbohydrates. Elsevier Science.

4. Sinnott, M.L. (1990) Catalytic mechanisms of enzymic glycosyl transfer. Chem. Rev. 90, 1171-1202. DOI: 10.1021/cr00105a006