4zre
From Proteopedia
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| - | '''Unreleased structure''' | ||
| - | + | ==Crystal structure of SMG1 F278D mutant== | |
| + | <StructureSection load='4zre' size='340' side='right'caption='[[4zre]], [[Resolution|resolution]] 2.00Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[4zre]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Malassezia_globosa_CBS_7966 Malassezia globosa CBS 7966]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4ZRE OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4ZRE FirstGlance]. <br> | ||
| + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2Å</td></tr> | ||
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></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=4zre FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4zre OCA], [https://pdbe.org/4zre PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4zre RCSB], [https://www.ebi.ac.uk/pdbsum/4zre PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4zre ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/LIP1_MALGO LIP1_MALGO] Secreted lipase involved in Dandruff and seborrheic dermatitis (D/SD) probably via lipase-mediated breakdown of sebaceous lipids and release of irritating free fatty acids (PubMed:17460728, PubMed:18000048). Shows activity against monoglyceride and diglyceride substrates, but not triglyceride substrates and does not exhibit regio-selective production of diacylglycerols (PubMed:17460728, PubMed:22750000, PubMed:25837472, PubMed:25955297, PubMed:26239010, PubMed:26365206, PubMed:27130210). Able to hydrolyze diacylglycerols such as distearin, dilinolein, dipalmitoylglycerol and dipalmitolein (PubMed:27130210). Cleaves oleic acid from 1,2 isomers of diolein on both the 1 and the 2 position of the glycerol backbone, resulting mainly in free fatty acids but no monoolein is detected (PubMed:27130210). Shows activity on monoolein and liberates mostly free fatty acids, but can also perform the reverse reaction and produce diolein (PubMed:27130210).<ref>PMID:17460728</ref> <ref>PMID:18000048</ref> <ref>PMID:22750000</ref> <ref>PMID:25837472</ref> <ref>PMID:25955297</ref> <ref>PMID:26239010</ref> <ref>PMID:26365206</ref> <ref>PMID:27130210</ref> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Monoacylglycerol and diacylglycerol lipases are industrially interesting enzymes, due to the health benefits that arise from the consumption of diglycerides compared to the traditional triglyceride oils. Most lipases possess an alpha-helix (lid) directly over the catalytic pocket which regulates the activity of the enzyme. Generally, lipases exist in active and inactive conformations, depending on the positioning of this lid subdomain. However, lipase SMG1, a monoacylglycerol and diacylglycerol specific lipase, has an atypical activation mechanism. In the present study we were able to prove by crystallography, in silico analysis and activity tests that only two positions, residues 102 and 278, are responsible for a gating mechanism that regulates the active and inactive states of the lipase, and that no significant structural changes take place during activation except for oxyanion hole formation. The elucidation of the gating effect provided data enabling the rational design of improved lipases with 6-fold increase in the hydrolytic activity toward diacylglycerols, just by providing additional substrate stabilization with a single mutation (F278N or F278T). Due to the conservation of F278 among the monoacylglycerol and diacylglycerol lipases in the Rhizomucor miehei lipase-like family, the gating mechanism described herein might represent a general mechanism applicable to other monoacylglycerol and diacylglycerol lipases as well. DATABASE: Structural data are available in the Protein Data Bank under the accession numbers 4ZRE (F278D mutant) and 4ZRD (F278N mutant). | ||
| - | + | Structure of product-bound SMG1 lipase: active site gating implications.,Guo S, Xu J, Pavlidis IV, Lan D, Bornscheuer UT, Liu J, Wang Y FEBS J. 2015 Sep 13. doi: 10.1111/febs.13513. PMID:26365206<ref>PMID:26365206</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | [[Category: | + | </div> |
| - | [[Category: | + | <div class="pdbe-citations 4zre" style="background-color:#fffaf0;"></div> |
| - | [[Category: | + | |
| - | [[Category: Liu | + | ==See Also== |
| - | [[Category: Xu | + | *[[Lipase 3D Structures|Lipase 3D Structures]] |
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Malassezia globosa CBS 7966]] | ||
| + | [[Category: Hou S]] | ||
| + | [[Category: Liu J]] | ||
| + | [[Category: Xu H]] | ||
| + | [[Category: Xu J]] | ||
Current revision
Crystal structure of SMG1 F278D mutant
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