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Glycoside Hydrolase Family 25

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Glycoside Hydrolase Family GHnn
Clan GH-x
Mechanism retaining/inverting
Active site residues This super-family has been shown to use an active site DE or DXE sequence motif ( or exceptionally in the case of GH85 a DXN moitif ADDIN EN.CITE ADDIN EN.CITE.DATA 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). This carboxylate pair promotes a double displacement mechanism in which the nucleophile is not enzyme-derived but is provided by the substrate in an intramolecular “neighboring group” attack of the N-acetyl carbonyl group ADDIN EN.CITE <EndNote>[1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 12, 12, 12, 12, 12, 12, 13, 14, 15, 16, 16, 17, 18, 19, 20, 21, 21, 22, 22, 23, 23, 23, 23, 24, 25, 26, 27, 28, 28, 29, 29, 30, 31, 32, 33, 34, 35, 35, 36, 37, 38, 39, 40, 40, 41, 42, 42, 43, 44, 44, 45, 45, 46, 46]</EndNote>6. Thus catalysis occurs via the formation, and subsequent breakdown of a covalent oxazoline intermediate.
CAZy DB link
http://www.cazy.org/fam/GHnn.html


Substrate specificities

Content is to be added here.

This is an example of how to make references to a journal article [47]. (See the References section below). Multiple references can go in the same place like this [47, 48]. You can even cite books using just the ISBN [49]. References that are not in PubMed can be typed in by hand [50].


Kinetics and Mechanism

Content is to be added here.


Catalytic Residues

Content is to be added here.


Three-dimensional structures

Content is to be added here.


Family Firsts

First sterochemistry determination
Cite some reference here, with a short (1-2 sentence) explanation [47].
First catalytic nucleophile identification
Cite some reference here, with a short (1-2 sentence) explanation [50].
First general acid/base residue identification
Cite some reference here, with a short (1-2 sentence) explanation [48].
First 3-D structure
Cite some reference here, with a short (1-2 sentence) explanation [49].

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 | PubMed ID:17323919 [Comfort2007]
  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 | PubMed ID:9312086 [He1999]
  3. Robert V. Stick and Spencer J. Williams. (2009) Carbohydrates. Elsevier Science. [3]
  4. Sinnott, M.L. (1990) Catalytic mechanisms of enzymic glycosyl transfer. Chem. Rev. 90, 1171-1202. DOI: 10.1021/cr00105a006

    [MikesClassic]

All Medline abstracts: PubMed