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| | ==The Clostridium cellulolyticum dockerin displays a dual binding mode for its cohesin partner== | | ==The Clostridium cellulolyticum dockerin displays a dual binding mode for its cohesin partner== |
| - | <StructureSection load='2vn5' size='340' side='right' caption='[[2vn5]], [[Resolution|resolution]] 1.90Å' scene=''> | + | <StructureSection load='2vn5' size='340' side='right'caption='[[2vn5]], [[Resolution|resolution]] 1.90Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2vn5]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_35319 Atcc 35319]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2VN5 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2VN5 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2vn5]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Ruminiclostridium_cellulolyticum Ruminiclostridium cellulolyticum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2VN5 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2VN5 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</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]] 1.9Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1g1k|1g1k]], [[1edg|1edg]], [[1g43|1g43]], [[1ehx|1ehx]], [[2vn6|2vn6]]</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene></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=2vn5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2vn5 OCA], [http://pdbe.org/2vn5 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2vn5 RCSB], [http://www.ebi.ac.uk/pdbsum/2vn5 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2vn5 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=2vn5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2vn5 OCA], [https://pdbe.org/2vn5 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2vn5 RCSB], [https://www.ebi.ac.uk/pdbsum/2vn5 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2vn5 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/GUNA_CLOCE GUNA_CLOCE]] 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/Q45996_9FIRM Q45996_9FIRM] |
| | == 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 35319]] | + | [[Category: Large Structures]] |
| - | [[Category: Bayer, E A]] | + | [[Category: Ruminiclostridium cellulolyticum]] |
| - | [[Category: Davies, G J]] | + | [[Category: Bayer EA]] |
| - | [[Category: Fierobe, H P]] | + | [[Category: Davies GJ]] |
| - | [[Category: Fontes, C M.G A]] | + | [[Category: Fierobe HP]] |
| - | [[Category: Gilbert, H J]] | + | [[Category: Fontes CMGA]] |
| - | [[Category: Martinez-Fleites, C]] | + | [[Category: Gilbert HJ]] |
| - | [[Category: Money, V A]] | + | [[Category: Martinez-Fleites C]] |
| - | [[Category: Pinheiro, B A]] | + | [[Category: Money VA]] |
| - | [[Category: Prates, J A.M]] | + | [[Category: Pinheiro BA]] |
| - | [[Category: Proctor, M R]] | + | [[Category: Prates JAM]] |
| - | [[Category: Carbohydrate metabolism]]
| + | [[Category: Proctor MR]] |
| - | [[Category: Cell adhesion]]
| + | |
| - | [[Category: Cellulose degradation]]
| + | |
| - | [[Category: Cellulosome]]
| + | |
| - | [[Category: Cohesin]]
| + | |
| - | [[Category: Dockerin]]
| + | |
| - | [[Category: Glycosidase]]
| + | |
| - | [[Category: Hydrolase]]
| + | |
| - | [[Category: Polysaccharide degradation]]
| + | |
| Structural highlights
Function
Q45996_9FIRM
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 plant cell wall degrading apparatus of anaerobic bacteria includes a large multienzyme complex termed the "cellulosome." The complex assembles through the interaction of enzyme-derived dockerin modules with the multiple cohesin modules of the noncatalytic scaffolding protein. Here we report the crystal structure of the Clostridium cellulolyticum cohesin-dockerin complex in two distinct orientations. The data show that the dockerin displays structural symmetry reflected by the presence of two essentially identical cohesin binding surfaces. In one binding mode, visualized through the A16S/L17T dockerin mutant, the C-terminal helix makes extensive interactions with its cohesin partner. In the other binding mode observed through the A47S/F48T dockerin variant, the dockerin is reoriented by 180 degrees and interacts with the cohesin primarily through the N-terminal helix. Apolar interactions dominate cohesin-dockerin recognition that is centered around a hydrophobic pocket on the surface of the cohesin, formed by Leu-87 and Leu-89, which is occupied, in the two binding modes, by the dockerin residues Phe-19 and Leu-50, respectively. Despite the structural similarity between the C. cellulolyticum and Clostridium thermocellum cohesins and dockerins, there is no cross-specificity between the protein partners from the two organisms. The crystal structure of the C. cellulolyticum complex shows that organism-specific recognition between the protomers is dictated by apolar interactions primarily between only two residues, Leu-17 in the dockerin and the cohesin amino acid Ala-129. The biological significance of the plasticity in dockerin-cohesin recognition, observed here in C. cellulolyticum and reported previously in C. thermocellum, is discussed.
The Clostridium cellulolyticum dockerin displays a dual binding mode for its cohesin partner.,Pinheiro BA, Proctor MR, Martinez-Fleites C, Prates JA, Money VA, Davies GJ, Bayer EA, Fontesm CM, Fierobe HP, Gilbert HJ J Biol Chem. 2008 Jun 27;283(26):18422-30. Epub 2008 Apr 28. PMID:18445585[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Pinheiro BA, Proctor MR, Martinez-Fleites C, Prates JA, Money VA, Davies GJ, Bayer EA, Fontesm CM, Fierobe HP, Gilbert HJ. The Clostridium cellulolyticum dockerin displays a dual binding mode for its cohesin partner. J Biol Chem. 2008 Jun 27;283(26):18422-30. Epub 2008 Apr 28. PMID:18445585 doi:10.1074/jbc.M801533200
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