1ukr

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[[Image:1ukr.jpg|left|200px]]
[[Image:1ukr.jpg|left|200px]]
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{{Structure
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<!--
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|PDB= 1ukr |SIZE=350|CAPTION= <scene name='initialview01'>1ukr</scene>, resolution 2.4&Aring;
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The line below this paragraph, containing "STRUCTURE_1ukr", creates the "Structure Box" on the page.
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|SITE= <scene name='pdbsite=EA:GLU+A+79+And+GLU+A+170+Refer+To+The+Catalytic+Acidic+Res+...'>EA</scene>, <scene name='pdbsite=EB:GLU+B+79+And+GLU+B+170+Refer+To+The+Catalytic+Acidic+Res+...'>EB</scene>, <scene name='pdbsite=EC:GLU+C+79+And+GLU+C+170+Refer+To+The+Catalytic+Acidic+Res+...'>EC</scene> and <scene name='pdbsite=ED:GLU+D+79+And+GLU+D+170+Refer+To+The+Catalytic+Acidic+Res+...'>ED</scene>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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|LIGAND=
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Endo-1,4-beta-xylanase Endo-1,4-beta-xylanase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.8 3.2.1.8] </span>
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or leave the SCENE parameter empty for the default display.
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|DOMAIN=
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{{STRUCTURE_1ukr| PDB=1ukr | SCENE= }}
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|RELATEDENTRY=
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ukr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ukr OCA], [http://www.ebi.ac.uk/pdbsum/1ukr PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1ukr RCSB]</span>
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'''STRUCTURE OF ENDO-1,4-BETA-XYLANASE C'''
'''STRUCTURE OF ENDO-1,4-BETA-XYLANASE C'''
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[[Category: Dijkstra, B W.]]
[[Category: Dijkstra, B W.]]
[[Category: Krengel, U.]]
[[Category: Krengel, U.]]
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[[Category: glycosidase]]
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[[Category: Glycosidase]]
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[[Category: hydrolase]]
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[[Category: Hydrolase]]
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[[Category: signal]]
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[[Category: Signal]]
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[[Category: xylan degradation]]
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[[Category: Xylan degradation]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 11:21:48 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 00:11:35 2008''
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Revision as of 08:21, 3 May 2008

Image:1ukr.jpg

Template:STRUCTURE 1ukr

STRUCTURE OF ENDO-1,4-BETA-XYLANASE C


Overview

The crystal structure of endo-1,4-beta-xylanase I from Aspergillus niger has been solved by molecular replacement and was refined to 2.4 A resolution. The final R-factor for all data from 6 to 2.4 A is 17.9%. The A. niger xylanase has a characteristic fold which is unique for family G xylanases (root-mean-square deviation = 1.1 A to Trichoderma reesei xylanase I, which has 53% sequence identity). It consists of a single domain composed predominantly of beta-strands. Two beta-sheets are twisted around a deep, long cleft, which is lined with many aromatic amino acid residues and is large enough to accommodate at least four xylose residues. The two conserved glutamate residues, Glu79 and Glu170, which are likely to be involved in catalysis, reach into this cleft from opposite sides. A niger xylanase I is of particular commercial interest because of its low pH optimum. A model is proposed which explains this low pH optimum compared to other members of xylanase family G.

About this Structure

1UKR is a Single protein structure of sequence from Aspergillus niger. Full crystallographic information is available from OCA.

Reference

Three-dimensional structure of Endo-1,4-beta-xylanase I from Aspergillus niger: molecular basis for its low pH optimum., Krengel U, Dijkstra BW, J Mol Biol. 1996 Oct 18;263(1):70-8. PMID:8890913 Page seeded by OCA on Sat May 3 11:21:48 2008

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OCA

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