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- * Glycosyl hydrolases family 3 active site *
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-
- It has been shown [1,2] that the following glycosyl hydrolases can be, on the
- basis of sequence similarities, classified into a single family:
-
- - Beta glucosidases (EC 3.2.1.21) from the fungi Aspergillus wentii (A-3),
- Hansenula anomala, Kluyveromyces fragilis, Saccharomycopsis fibuligera,
- (BGL1 and BGL2), Schizophyllum commune, and Trichoderma reesei (BGL1).
- - Beta glucosidases from the bacteria Agrobacterium tumefaciens (Cbg1),
- Butyrivibrio fibrisolvens (bglA), Clostridium thermocellum (bglB), and
- Ruminococcus albus.
- - Escherichia coli hypothetical protein yohA.
-
- One of the conserved regions in these enzymes is centered on a conserved
- aspartic acid residue which has been shown [3], in Aspergillus wentii beta-
- glucosidase A3, to be implicated in the catalytic mechanism. We have used this
- region as a signature pattern.
-
- -Consensus pattern: [EQ]-x(4)-G-[LIVMFY]-x-[LIVM]-[ST]-D-W-x-[AG]-x(12)-[DN]
- [The first D is the active site residue]
- -Sequences known to belong to this class detected by the pattern: ALL, except
- E.coli yohA.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Expert(s) to contact by email: Henrissat B.
- bernie@cermav.grenet.fr
-
- -Last update: December 1992 / First entry.
-
- [ 1] Henrissat B.
- Biochem. J. 280:309-316(1991).
- [ 2] Castle L.A., Smith K.D., Morris R.O.
- J. Bacteriol. 174:1478-1486(1992).
- [ 3] Bause E., Legler G.
- Biochim. Biophys. Acta 626:459-465(1980).
-