1oc7: Difference between revisions

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[[Image:1oc7.jpg|left|200px]]
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{{STRUCTURE_1oc7|  PDB=1oc7  |  SCENE=  }}  
{{STRUCTURE_1oc7|  PDB=1oc7  |  SCENE=  }}  


'''D405N MUTANT OF THE CELLOBIOHYDROLASE CEL6A FROM HUMICOLA INSOLENS IN COMPLEX WITH METHYL-TETRATHIO-ALPHA-D-CELLOPENTOSIDE AT 1.1 ANGSTROM RESOLUTION'''
===D405N MUTANT OF THE CELLOBIOHYDROLASE CEL6A FROM HUMICOLA INSOLENS IN COMPLEX WITH METHYL-TETRATHIO-ALPHA-D-CELLOPENTOSIDE AT 1.1 ANGSTROM RESOLUTION===




==Overview==
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The enzymatic digestion of cellulose entails intimate involvement of cellobiohydrolases, whose characteristic active-center tunnel contributes to a processive degradation of the polysaccharide. The cellobiohydrolase Cel6A displays an active site within a tunnel formed by two extended loops, which are known to open and close in response to ligand binding. Here we present five structures of wild-type and mutant forms of Cel6A from Humicola insolens in complex with nonhydrolyzable thio-oligosaccharides, at resolutions from 1.7-1.1 A, dissecting the structural accommodation of a processing substrate chain through the active center during hydrolysis. Movement of ligand is facilitated by extensive solvent-mediated interactions and through flexibility in the hydrophobic surfaces provided by a sheath of tryptophan residues.
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{{ABSTRACT_PUBMED_12842048}}


==About this Structure==
==About this Structure==
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[[Category: Hydrolase]]
[[Category: Hydrolase]]
[[Category: Processive mechanism]]
[[Category: Processive mechanism]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May  3 03:39:23 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 12:52:11 2008''

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