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| | ==HUMICOLA INSOLENS ENDOCELLULASE EGI NATIVE STRUCTURE== | | ==HUMICOLA INSOLENS ENDOCELLULASE EGI NATIVE STRUCTURE== |
| - | <StructureSection load='2a39' size='340' side='right' caption='[[2a39]], [[Resolution|resolution]] 2.20Å' scene=''> | + | <StructureSection load='2a39' size='340' side='right'caption='[[2a39]], [[Resolution|resolution]] 2.20Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2a39]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_16454 Atcc 16454]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2A39 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2A39 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2a39]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Humicola_insolens Humicola insolens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2A39 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2A39 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.2Å</td></tr> |
| - | <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=PCA:PYROGLUTAMIC+ACID'>PCA</scene></td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=PCA:PYROGLUTAMIC+ACID'>PCA</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">POTENTIAL ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=34413 ATCC 16454])</td></tr> | + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2a39 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2a39 OCA], [https://pdbe.org/2a39 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2a39 RCSB], [https://www.ebi.ac.uk/pdbsum/2a39 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2a39 ProSAT]</span></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Cellulase Cellulase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.4 3.2.1.4] </span></td></tr>
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| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2a39 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2a39 OCA], [http://pdbe.org/2a39 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2a39 RCSB], [http://www.ebi.ac.uk/pdbsum/2a39 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2a39 ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/GUN1_HUMIN GUN1_HUMIN]] The biological conversion of cellulose to glucose generally requires three types of hydrolytic enzymes: (1) Endoglucanases which cut internal beta-1,4-glucosidic bonds; (2) Exocellobiohydrolases that cut the dissaccharide cellobiose from the non-reducing end of the cellulose polymer chain; (3) Beta-1,4-glucosidases which hydrolyze the cellobiose and other short cello-oligosaccharides to glucose. | + | [https://www.uniprot.org/uniprot/GUN1_HUMIN GUN1_HUMIN] The biological conversion of cellulose to glucose generally requires three types of hydrolytic enzymes: (1) Endoglucanases which cut internal beta-1,4-glucosidic bonds; (2) Exocellobiohydrolases that cut the dissaccharide cellobiose from the non-reducing end of the cellulose polymer chain; (3) Beta-1,4-glucosidases which hydrolyze the cellobiose and other short cello-oligosaccharides to glucose. |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | ==See Also== | | ==See Also== |
| - | *[[Glucanase|Glucanase]] | + | *[[Glucanase 3D structures|Glucanase 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Atcc 16454]] | + | [[Category: Humicola insolens]] |
| - | [[Category: Cellulase]] | + | [[Category: Large Structures]] |
| - | [[Category: Davies, G J]] | + | [[Category: Davies GJ]] |
| - | [[Category: Divne, C]] | + | [[Category: Divne C]] |
| - | [[Category: Jones, T A]] | + | [[Category: Jones TA]] |
| - | [[Category: Mackenzie, L]] | + | [[Category: Mackenzie L]] |
| - | [[Category: Schulein, M]] | + | [[Category: Schulein M]] |
| - | [[Category: Sulzenbacher, G]] | + | [[Category: Sulzenbacher G]] |
| - | [[Category: Withers, S G]] | + | [[Category: Withers SG]] |
| - | [[Category: Woldike, H F]] | + | [[Category: Woldike HF]] |
| - | [[Category: Cellulose degradation]]
| + | |
| - | [[Category: Endoglucanase]]
| + | |
| - | [[Category: Glycoside hydrolase family 7]]
| + | |
| - | [[Category: Glycosylated protein]]
| + | |
| - | [[Category: Hydrolase]]
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| Structural highlights
Function
GUN1_HUMIN The biological conversion of cellulose to glucose generally requires three types of hydrolytic enzymes: (1) Endoglucanases which cut internal beta-1,4-glucosidic bonds; (2) Exocellobiohydrolases that cut the dissaccharide cellobiose from the non-reducing end of the cellulose polymer chain; (3) Beta-1,4-glucosidases which hydrolyze the cellobiose and other short cello-oligosaccharides to glucose.
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Cellulose is the major polysaccharide component of the plant cell wall and the most abundant naturally produced macromolecule on Earth. The enzymic degradation of cellulose, by cellulases, is therefore of great environmental and commercial significance. Cellulases are found in 12 of the glycoside hydrolase families classified according to their amino acid sequence similarities. Endoglucanase I (Cel7B), from the soft-rot fungus Humicola insolens, is a family 7 enzyme. The structure of the native form of Cel7B from H. insolens at 2.2 A resolution has been solved by molecular replacement using the known Trichoderma reesei cellobiohydrolase I [Divne, Stahlberg, Reinikainen, Ruohonen, Pettersson, Knowles, Teeri and Jones (1994) Science 265, 524-528] structure as the search model. Cel7B catalyses hydrolysis of the beta-1,4 glycosidic linkages in cellulose with net retention of anomeric configuration. The catalytic nucleophile at the active site of Cel7B has been identified as Glu-197 by trapping of a 2-deoxy-2-fluorocellotriosyl enzyme intermediate and identification of the labelled peptide in peptic digests by tandem MS. Site-directed mutagenesis of both Glu-197 and the prospective catalytic acid, Glu-202, results in inactive enzyme, confirming the critical role of these groups for catalysis.
Crystal structure of the family 7 endoglucanase I (Cel7B) from Humicola insolens at 2.2 A resolution and identification of the catalytic nucleophile by trapping of the covalent glycosyl-enzyme intermediate.,MacKenzie LF, Sulzenbacher G, Divne C, Jones TA, Woldike HF, Schulein M, Withers SG, Davies GJ Biochem J. 1998 Oct 15;335 ( Pt 2):409-16. PMID:9761741[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ MacKenzie LF, Sulzenbacher G, Divne C, Jones TA, Woldike HF, Schulein M, Withers SG, Davies GJ. Crystal structure of the family 7 endoglucanase I (Cel7B) from Humicola insolens at 2.2 A resolution and identification of the catalytic nucleophile by trapping of the covalent glycosyl-enzyme intermediate. Biochem J. 1998 Oct 15;335 ( Pt 2):409-16. PMID:9761741
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