1gqi

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[[Image:1gqi.gif|left|200px]]
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{{STRUCTURE_1gqi| PDB=1gqi | SCENE= }}
{{STRUCTURE_1gqi| PDB=1gqi | SCENE= }}
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'''STRUCTURE OF PSEUDOMONAS CELLULOSA ALPHA-D-GLUCURONIDASE'''
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===STRUCTURE OF PSEUDOMONAS CELLULOSA ALPHA-D-GLUCURONIDASE===
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==Overview==
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Alpha-glucuronidases, components of an ensemble of enzymes central to the recycling of photosynthetic biomass, remove the alpha-1,2 linked 4-O-methyl glucuronic acid from xylans. The structure of the alpha-glucuronidase, GlcA67A, from Pseudomonas cellulosa reveals three domains, the central of which is a (beta/alpha)(8) barrel housing the catalytic apparatus. Complexes of the enzyme with the individual reaction products, either xylobiose or glucuronic acid, and the ternary complex of both glucuronic acid and xylotriose reveal a "blind" pocket which selects for short decorated xylooligosaccharides substituted with the uronic acid at their nonreducing end, consistent with kinetic data. The catalytic center reveals a constellation of carboxylates; Glu292 is poised to provide protonic assistance to leaving group departure with Glu393 and Asp365 both appropriately positioned to provide base-catalyzed assistance for inverting nucleophilic attack by water.
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The line below this paragraph, {{ABSTRACT_PUBMED_11937059}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 11937059 is the PubMed ID number.
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{{ABSTRACT_PUBMED_11937059}}
==About this Structure==
==About this Structure==
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[[Category: Glucuronidase]]
[[Category: Glucuronidase]]
[[Category: Glycoside hydrolase]]
[[Category: Glycoside hydrolase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 17:53:41 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 05:54:07 2008''

Revision as of 02:54, 1 July 2008

Image:1gqi.png

Template:STRUCTURE 1gqi

STRUCTURE OF PSEUDOMONAS CELLULOSA ALPHA-D-GLUCURONIDASE

Template:ABSTRACT PUBMED 11937059

About this Structure

1GQI is a Single protein structure of sequence from Cellvibrio japonicus. Full crystallographic information is available from OCA.

Reference

The structural basis for catalysis and specificity of the Pseudomonas cellulosa alpha-glucuronidase, GlcA67A., Nurizzo D, Nagy T, Gilbert HJ, Davies GJ, Structure. 2002 Apr;10(4):547-56. PMID:11937059

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