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1a3h

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{{STRUCTURE_1a3h| PDB=1a3h | SCENE= }}
{{STRUCTURE_1a3h| PDB=1a3h | SCENE= }}
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'''ENDOGLUCANASE CEL5A FROM BACILLUS AGARADHERANS AT 1.6A RESOLUTION'''
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===ENDOGLUCANASE CEL5A FROM BACILLUS AGARADHERANS AT 1.6A RESOLUTION===
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==Overview==
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The enzymatic degradation of cellulose, by cellulases, is not only industrially important in the food, paper, and textile industries but also a potentially useful method for the environmentally friendly recycling of municipal waste. An understanding of the structural and mechanistic requirements for the hydrolysis of the beta-1,4 glycosidic bonds of cellulose is an essential prerequisite for beneficial engineering of cellulases for these processes. Cellulases have been classified into 13 of the 62 glycoside hydrolase families [Henrissat, B., and Bairoch, A. (1996) Biochem J. 316, 695-696]. The structure of the catalytic core of the family 5 endoglucanase, Ce15A, from the alkalophilic Bacillus agaradherans has been solved by multiple isomorphous replacement at 1.6 A resolution. Ce15A has the (alpha/beta)8 barrel structure and signature structural features typical of the grouping of glycoside hydrolase families known as clan GH-A, with the catalytic acid/base Glu 139 and nucleophile Glu 228 on barrel strands beta 4 and beta 7 as expected. In addition to the native enzyme, the 2.0 A resolution structure of the cellobiose-bound form of the enzyme has also been determined. Cellobiose binds preferentially in the -2 and -3 subsites of the enzyme. Kinetic studies on the isolated catalytic core domain of Ce15A, using a series of reduced cellodextrins as substrates, suggest approximately five to six binding sites, consistent with the shape and size of the cleft observed by crystallography.
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(as it appears on PubMed at http://www.pubmed.gov), where 9485319 is the PubMed ID number.
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{{ABSTRACT_PUBMED_9485319}}
==About this Structure==
==About this Structure==
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[[Category: Glycoside hydrolase family 5]]
[[Category: Glycoside hydrolase family 5]]
[[Category: Hydrolase]]
[[Category: Hydrolase]]
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Revision as of 12:55, 30 June 2008

Image:1a3h.png

Template:STRUCTURE 1a3h

ENDOGLUCANASE CEL5A FROM BACILLUS AGARADHERANS AT 1.6A RESOLUTION

Template:ABSTRACT PUBMED 9485319

About this Structure

1A3H is a Single protein structure of sequence from Bacillus agaradhaerens. Full crystallographic information is available from OCA.

Reference

Structure of the Bacillus agaradherans family 5 endoglucanase at 1.6 A and its cellobiose complex at 2.0 A resolution., Davies GJ, Dauter M, Brzozowski AM, Bjornvad ME, Andersen KV, Schulein M, Biochemistry. 1998 Feb 17;37(7):1926-32. PMID:9485319

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