3wdv: Difference between revisions
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''' | ==The complex structure of PtLic16A with cellotetraose== | ||
<StructureSection load='3wdv' size='340' side='right' caption='[[3wdv]], [[Resolution|resolution]] 1.94Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[3wdv]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3WDV OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3WDV FirstGlance]. <br> | |||
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BGC:BETA-D-GLUCOSE'>BGC</scene>, <scene name='pdbligand=CBI:CELLOBIOSE'>CBI</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene><br> | |||
<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3wdt|3wdt]], [[3wdu|3wdu]], [[3wdw|3wdw]], [[3wdx|3wdx]], [[3wdy|3wdy]]</td></tr> | |||
<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Licheninase Licheninase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.73 3.2.1.73] </span></td></tr> | |||
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3wdv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3wdv OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3wdv RCSB], [http://www.ebi.ac.uk/pdbsum/3wdv PDBsum]</span></td></tr> | |||
<table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The thermostable 1,3-1,4-beta-glucanase PtLic16A from the fungus Paecilomyces thermophila catalyzes stringent hydrolysis of barley beta-glucan and lichenan with an outstanding efficiency and has great potential for broad industrial applications. Here, we report the crystal structures of PtLic16A and an inactive mutant E113A in ligand-free form and in complex with the ligands cellobiose, cellotetraose and glucotriose at 1.80A to 2.25A resolution. PtLic16A adopts a typical beta-jellyroll fold with a curved surface and the concave face forms an extended ligand binding cleft. These structures suggest that PtLic16A might carry out the hydrolysis via retaining mechanism with E113 and E118 serving as the nucleophile and general acid/base, respectively. Interestingly, in the structure of E113A/1,3-1,4-beta-glucotriose complex, the sugar bound to the -1 subsite adopts an intermediate-like (alpha-anomeric) configuration. By combining all crystal structures solved here, a comprehensive binding mode for a substrate is proposed. These findings not only help understand the 1,3-1,4-beta-glucanase catalytic mechanism but also provide a basis for further enzymatic engineering. | |||
Structural and mutagenetic analyses of a 1,3-1,4-beta-glucanase from Paecilomyces thermophila.,Cheng YS, Huang CH, Chen CC, Huang TY, Ko TP, Huang JW, Wu TH, Liu JR, Guo RT Biochim Biophys Acta. 2014 Feb;1844(2):366-73. doi: 10.1016/j.bbapap.2013.11.005., Epub 2013 Nov 18. PMID:24262091<ref>PMID:24262091</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Licheninase]] | |||
[[Category: Chen, C C.]] | |||
[[Category: Cheng, Y S.]] | |||
[[Category: Guo, R T.]] | |||
[[Category: Huang, C H.]] | |||
[[Category: Huang, J W.]] | |||
[[Category: Huang, T Y.]] | |||
[[Category: Ko, T P.]] | |||
[[Category: Liu, J R.]] | |||
[[Category: Wu, T H.]] | |||
[[Category: 3-1]] | |||
[[Category: 4-beta-glucanase]] | |||
[[Category: Beta-jellyroll fold]] | |||
[[Category: Hydrolase]] | |||
[[Category: Ptlic16a]] | |||
Revision as of 10:18, 9 July 2014
The complex structure of PtLic16A with cellotetraoseThe complex structure of PtLic16A with cellotetraose
Structural highlights
Publication Abstract from PubMedThe thermostable 1,3-1,4-beta-glucanase PtLic16A from the fungus Paecilomyces thermophila catalyzes stringent hydrolysis of barley beta-glucan and lichenan with an outstanding efficiency and has great potential for broad industrial applications. Here, we report the crystal structures of PtLic16A and an inactive mutant E113A in ligand-free form and in complex with the ligands cellobiose, cellotetraose and glucotriose at 1.80A to 2.25A resolution. PtLic16A adopts a typical beta-jellyroll fold with a curved surface and the concave face forms an extended ligand binding cleft. These structures suggest that PtLic16A might carry out the hydrolysis via retaining mechanism with E113 and E118 serving as the nucleophile and general acid/base, respectively. Interestingly, in the structure of E113A/1,3-1,4-beta-glucotriose complex, the sugar bound to the -1 subsite adopts an intermediate-like (alpha-anomeric) configuration. By combining all crystal structures solved here, a comprehensive binding mode for a substrate is proposed. These findings not only help understand the 1,3-1,4-beta-glucanase catalytic mechanism but also provide a basis for further enzymatic engineering. Structural and mutagenetic analyses of a 1,3-1,4-beta-glucanase from Paecilomyces thermophila.,Cheng YS, Huang CH, Chen CC, Huang TY, Ko TP, Huang JW, Wu TH, Liu JR, Guo RT Biochim Biophys Acta. 2014 Feb;1844(2):366-73. doi: 10.1016/j.bbapap.2013.11.005., Epub 2013 Nov 18. PMID:24262091[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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