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| | <StructureSection load='2bvw' size='340' side='right'caption='[[2bvw]], [[Resolution|resolution]] 1.70Å' scene=''> | | <StructureSection load='2bvw' size='340' side='right'caption='[[2bvw]], [[Resolution|resolution]] 1.70Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2bvw]] 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=2BVW OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2BVW FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2bvw]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Atcc_16454 Atcc 16454]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2BVW OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2BVW FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BGC:BETA-D-GLUCOSE'>BGC</scene>, <scene name='pdbligand=CTR:CELLOTRIOSE'>CTR</scene>, <scene name='pdbligand=CTT:BETA-D-GLUCOPYRANOSYL-(1- 4)-BETA-D-GLUCOPYRANOSYL-(1- 4)-BETA-D-GLUCOPYRANOSYL-(1- 4)-BETA-D-GLUCOPYRANOSE'>CTT</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BGC:BETA-D-GLUCOSE'>BGC</scene>, <scene name='pdbligand=GLC:ALPHA-D-GLUCOSE'>GLC</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Cellulose_1,4-beta-cellobiosidase_(non-reducing_end) Cellulose 1,4-beta-cellobiosidase (non-reducing end)], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.91 3.2.1.91] </span></td></tr> | + | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Cellulose_1,4-beta-cellobiosidase_(non-reducing_end) Cellulose 1,4-beta-cellobiosidase (non-reducing end)], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.91 3.2.1.91] </span></td></tr> |
| - | <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=2bvw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2bvw OCA], [http://pdbe.org/2bvw PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2bvw RCSB], [http://www.ebi.ac.uk/pdbsum/2bvw PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2bvw ProSAT]</span></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=2bvw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2bvw OCA], [https://pdbe.org/2bvw PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2bvw RCSB], [https://www.ebi.ac.uk/pdbsum/2bvw PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2bvw ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/GUX6_HUMIN GUX6_HUMIN]] Plays a central role in the recycling of plant biomass. 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.<ref>PMID:9882628</ref> | + | [[https://www.uniprot.org/uniprot/GUX6_HUMIN GUX6_HUMIN]] Plays a central role in the recycling of plant biomass. 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.<ref>PMID:9882628</ref> |
| | == 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== |
| | *[[Cellobiohydrolase 3D structures|Cellobiohydrolase 3D structures]] | | *[[Cellobiohydrolase 3D structures|Cellobiohydrolase 3D structures]] |
| - | *[[User:Eric Martz/JSmol Notes|User:Eric Martz/JSmol Notes]] | |
| | == References == | | == References == |
| | <references/> | | <references/> |
| Structural highlights
2bvw is a 2 chain structure with sequence from Atcc 16454. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Ligands: | , , , |
| Activity: | Cellulose 1,4-beta-cellobiosidase (non-reducing end), with EC number 3.2.1.91 |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
[GUX6_HUMIN] Plays a central role in the recycling of plant biomass. 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.[1]
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
The mechanisms of crystalline cellulose degradation by cellulases are of paramount importance for the exploitation of these enzymes in applied processes, such as biomass conversion. Cellulases have traditionally been classified into cellobiohydrolases, which are effective in the degradation of crystalline materials, and endoglucanases, which appear to act on "soluble" regions of the substrate. Humicola insolensCel6A (CBH II) is a cellobiohydrolase from glycoside hydrolase family 6 whose native structure has been determined at 1.9 A resolution [Varrot, A., Hastrup, S., Schulein, M., and Davies, G. J. (1999) Biochem. J. 337, 297-304]. Here we present the structure of the catalytic core domain of Humicola insolens cellobiohydrolase II Cel6A in complex with glucose/cellotetraose at 1.7 A resolution. Crystals of Cel6A, grown in the presence of cellobiose, reveal six binding subsites, with a single glucose moiety bound in the -2 subsite and cellotetraose in the +1 to +4 subsites. The complex structure is strongly supportive of the assignment of Asp 226 as the catalytic acid and consistent with proposals that Asp 405 acts as the catalytic base. The structure undergoes several conformational changes upon substrate binding, the most significant of which is a closing of the two active site loops (residues 174-196 and 397-435) with main-chain movements of up to 4.5 A observed. This complex not only defines the polysaccharide-enzyme interactions but also provides the first three-dimensional demonstration of conformational change in this class of enzymes.
Structural changes of the active site tunnel of Humicola insolens cellobiohydrolase, Cel6A, upon oligosaccharide binding.,Varrot A, Schulein M, Davies GJ Biochemistry. 1999 Jul 13;38(28):8884-91. PMID:10413461[2]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Varrot A, Hastrup S, Schulein M, Davies GJ. Crystal structure of the catalytic core domain of the family 6 cellobiohydrolase II, Cel6A, from Humicola insolens, at 1.92 A resolution. Biochem J. 1999 Jan 15;337 ( Pt 2):297-304. PMID:9882628
- ↑ Varrot A, Schulein M, Davies GJ. Structural changes of the active site tunnel of Humicola insolens cellobiohydrolase, Cel6A, upon oligosaccharide binding. Biochemistry. 1999 Jul 13;38(28):8884-91. PMID:10413461 doi:10.1021/bi9903998
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