1j0h: Difference between revisions
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==Crystal structure of Bacillus stearothermophilus neopullulanase== | ==Crystal structure of Bacillus stearothermophilus neopullulanase== | ||
<StructureSection load='1j0h' size='340' side='right' caption='[[1j0h]], [[Resolution|resolution]] 1.90Å' scene=''> | <StructureSection load='1j0h' size='340' side='right' caption='[[1j0h]], [[Resolution|resolution]] 1.90Å' scene=''> | ||
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1j0i|1j0i]], [[1j0j|1j0j]], [[1j0k|1j0k]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1j0i|1j0i]], [[1j0j|1j0j]], [[1j0k|1j0k]]</td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Neopullulanase Neopullulanase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.135 3.2.1.135] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Neopullulanase Neopullulanase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.135 3.2.1.135] </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=1j0h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1j0h OCA], [http://pdbe.org/1j0h PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1j0h RCSB], [http://www.ebi.ac.uk/pdbsum/1j0h PDBsum]</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=1j0h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1j0h OCA], [http://pdbe.org/1j0h PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1j0h RCSB], [http://www.ebi.ac.uk/pdbsum/1j0h PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1j0h ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/j0/1j0h_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/j0/1j0h_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
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</div> | </div> | ||
<div class="pdbe-citations 1j0h" style="background-color:#fffaf0;"></div> | <div class="pdbe-citations 1j0h" style="background-color:#fffaf0;"></div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 12:06, 17 January 2018
Crystal structure of Bacillus stearothermophilus neopullulanaseCrystal structure of Bacillus stearothermophilus neopullulanase
Structural highlights
Function[NEPU_GEOSE] Hydrolyzes pullulan efficiently but only a small amount of starch. Endohydrolysis of 1,4-alpha-glucosidic linkages in pullulan to form panose. Cleaves also (1-6)-alpha-glucosidic linkages to form maltotriose. 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 PubMedCrystal structures of Bacillus stearothermophilus TRS40 neopullulanase and its complexes with panose, maltotetraose and isopanose were determined at resolutions of 1.9, 2.4, 2.8 and 3.2A, respectively. Since the latter two carbohydrates are substrates of this enzyme, a deactivated mutant at the catalytic residue Glu357-->Gln was used for complex crystallization. The structures were refined at accuracies with r.m.s. deviations of bond lengths and bond angles ranging from 0.005A to 0.008A and 1.3 degrees to 1.4 degrees, respectively. The active enzyme forms a dimer in the crystalline state and in solution. The monomer enzyme is composed of four domains, N, A, B and C, and has a (beta/alpha)(8)-barrel in domain A. The active site lies between domain A and domain N from the other monomer. The results show that dimer formation makes the active-site cleft narrower than those of ordinary alpha-amylases, which may contribute to the unique substrate specificity of this enzyme toward both alpha-1,4 and alpha-1,6-glucosidic linkages. This specificity may be influenced by the subsite structure. Only subsites -1 and -2 are commonly occupied by the product and substrates, suggesting that equivocal recognition occurs at the other subsites, which contributes to the wide substrate specificity of this enzyme. Three-dimensional structure and substrate binding of Bacillus stearothermophilus neopullulanase.,Hondoh H, Kuriki T, Matsuura Y J Mol Biol. 2003 Feb 7;326(1):177-88. PMID:12547200[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References |
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