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| | ==Plant carboxylesterase AeCXE1 from Actinidia eriantha with acyl adduct== | | ==Plant carboxylesterase AeCXE1 from Actinidia eriantha with acyl adduct== |
| - | <StructureSection load='2o7r' size='340' side='right' caption='[[2o7r]], [[Resolution|resolution]] 1.40Å' scene=''> | + | <StructureSection load='2o7r' size='340' side='right'caption='[[2o7r]], [[Resolution|resolution]] 1.40Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2o7r]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Acter Acter]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2O7R OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2O7R FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2o7r]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Actinidia_eriantha Actinidia eriantha]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2O7R OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2O7R FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=4PA:PROPYL+ACETATE'>4PA</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]] 1.4Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2o7v|2o7v]]</td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=4PA:PROPYL+ACETATE'>4PA</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CXE1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=165200 ACTER])</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=2o7r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2o7r OCA], [https://pdbe.org/2o7r PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2o7r RCSB], [https://www.ebi.ac.uk/pdbsum/2o7r PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2o7r ProSAT]</span></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Carboxylesterase Carboxylesterase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.1.1 3.1.1.1] </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=2o7r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2o7r OCA], [http://pdbe.org/2o7r PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2o7r RCSB], [http://www.ebi.ac.uk/pdbsum/2o7r PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2o7r ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/CXE1_ACTER CXE1_ACTER]] Carboxylesterase acting on esters with varying acyl chain length.<ref>PMID:17256879</ref> | + | [https://www.uniprot.org/uniprot/CXE1_ACTER CXE1_ACTER] Carboxylesterase acting on esters with varying acyl chain length.<ref>PMID:17256879</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== |
| - | *[[Carboxylesterase|Carboxylesterase]] | + | *[[Carboxylesterase 3D structures|Carboxylesterase 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Acter]] | |
| - | [[Category: Carboxylesterase]] | |
| - | [[Category: Baker, E N]] | |
| - | [[Category: Baker, H M]] | |
| - | [[Category: Ileperuma, N R]] | |
| - | [[Category: Marshall, S D]] | |
| - | [[Category: Newcomb, R D]] | |
| - | [[Category: Oakeshott, J G]] | |
| - | [[Category: Plummer, K M]] | |
| - | [[Category: Russell, R J]] | |
| - | [[Category: Squire, C J]] | |
| | [[Category: Actinidia eriantha]] | | [[Category: Actinidia eriantha]] |
| - | [[Category: Alpha/beta hydrolase]] | + | [[Category: Large Structures]] |
| - | [[Category: Hydrolase]] | + | [[Category: Baker EN]] |
| | + | [[Category: Baker HM]] |
| | + | [[Category: Ileperuma NR]] |
| | + | [[Category: Marshall SD]] |
| | + | [[Category: Newcomb RD]] |
| | + | [[Category: Oakeshott JG]] |
| | + | [[Category: Plummer KM]] |
| | + | [[Category: Russell RJ]] |
| | + | [[Category: Squire CJ]] |
| Structural highlights
Function
CXE1_ACTER Carboxylesterase acting on esters with varying acyl chain length.[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
Carboxylesterases (CXEs) are widely distributed in plants, where they have been implicated in roles that include plant defense, plant development, and secondary metabolism. We have cloned, overexpressed, purified, and crystallized a carboxylesterase from the kiwifruit species Actinidia eriantha (AeCXE1). The structure of AeCXE1 was determined by X-ray crystallography at 1.4 A resolution. The crystal structure revealed that AeCXE1 is a member of the alpha/beta-hydrolase fold superfamily, most closely related structurally to the hormone-sensitive lipase subgroup. The active site of the enzyme, located in an 11 A deep hydrophobic gorge, contains the conserved catalytic triad residues Ser169, Asp276, and His306. Kinetic analysis using artificial ester substrates showed that the enzyme can hydrolyze a range of carboxylester substrates with acyl groups ranging from C2 to C16, with a preference for butyryl moieties. This preference was supported by the discovery of a three-carbon acyl adduct bound to the active site Ser169 in the native structure. AeCXE1 was also found to be inhibited by organophosphates, with paraoxon (IC50 = 1.1 muM) a more potent inhibitor than dimethylchlorophosphate (DMCP; IC50 = 9.2 muM). The structure of AeCXE1 with paraoxon bound was determined at 2.3 A resolution and revealed that the inhibitor binds covalently to the catalytic serine residue, with virtually no change in the structure of the enzyme. The structural information for AeCXE1 provides a basis for addressing the wider functional roles of carboxylesterases in plants.
High-resolution crystal structure of plant carboxylesterase AeCXE1, from Actinidia eriantha, and its complex with a high-affinity inhibitor paraoxon.,Ileperuma NR, Marshall SD, Squire CJ, Baker HM, Oakeshott JG, Russell RJ, Plummer KM, Newcomb RD, Baker EN Biochemistry. 2007 Feb 20;46(7):1851-9. Epub 2007 Jan 26. PMID:17256879[2]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Ileperuma NR, Marshall SD, Squire CJ, Baker HM, Oakeshott JG, Russell RJ, Plummer KM, Newcomb RD, Baker EN. High-resolution crystal structure of plant carboxylesterase AeCXE1, from Actinidia eriantha, and its complex with a high-affinity inhibitor paraoxon. Biochemistry. 2007 Feb 20;46(7):1851-9. Epub 2007 Jan 26. PMID:17256879 doi:10.1021/bi062046w
- ↑ Ileperuma NR, Marshall SD, Squire CJ, Baker HM, Oakeshott JG, Russell RJ, Plummer KM, Newcomb RD, Baker EN. High-resolution crystal structure of plant carboxylesterase AeCXE1, from Actinidia eriantha, and its complex with a high-affinity inhibitor paraoxon. Biochemistry. 2007 Feb 20;46(7):1851-9. Epub 2007 Jan 26. PMID:17256879 doi:10.1021/bi062046w
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