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| | ==Crystal Structure of TesA== | | ==Crystal Structure of TesA== |
| - | <StructureSection load='4jgg' size='340' side='right' caption='[[4jgg]], [[Resolution|resolution]] 1.90Å' scene=''> | + | <StructureSection load='4jgg' size='340' side='right'caption='[[4jgg]], [[Resolution|resolution]] 1.90Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4jgg]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Pseae Pseae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4JGG OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4JGG FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4jgg]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Pseudomonas_aeruginosa_PAO1 Pseudomonas aeruginosa PAO1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4JGG OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4JGG FirstGlance]. <br> |
| - | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">PA2856, tesA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=208964 PSEAE])</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='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'>[https://proteopedia.org/fgij/fg.htm?mol=4jgg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4jgg OCA], [https://pdbe.org/4jgg PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4jgg RCSB], [https://www.ebi.ac.uk/pdbsum/4jgg PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4jgg ProSAT]</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=4jgg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4jgg OCA], [http://pdbe.org/4jgg PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4jgg RCSB], [http://www.ebi.ac.uk/pdbsum/4jgg PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4jgg ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/EST_PSEAE EST_PSEAE]] Esterase that exhibits the highest activity towards Tween detergents and p-nitrophenyl esters of short acyl chain length. Also displays a low thioesterase activity towards palmitoyl-coenzyme A, but is not active towards acetyl-coenzyme A. | + | [https://www.uniprot.org/uniprot/EST_PSEAE EST_PSEAE] Esterase that exhibits the highest activity towards Tween detergents and p-nitrophenyl esters of short acyl chain length. Also displays a low thioesterase activity towards palmitoyl-coenzyme A, but is not active towards acetyl-coenzyme A. |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Carboxylesterase]] | + | [[Category: Large Structures]] |
| - | [[Category: Pseae]] | + | [[Category: Pseudomonas aeruginosa PAO1]] |
| - | [[Category: Batra-Safferling, R]] | + | [[Category: Batra-Safferling R]] |
| - | [[Category: Granzin, J]] | + | [[Category: Granzin J]] |
| - | [[Category: Jaeger, K E]] | + | [[Category: Jaeger K-E]] |
| - | [[Category: Kovacic, F]] | + | [[Category: Kovacic F]] |
| - | [[Category: Alpha/beta/alpha]]
| + | |
| - | [[Category: Hydrolase]]
| + | |
| - | [[Category: Lysophospholipase]]
| + | |
| Structural highlights
Function
EST_PSEAE Esterase that exhibits the highest activity towards Tween detergents and p-nitrophenyl esters of short acyl chain length. Also displays a low thioesterase activity towards palmitoyl-coenzyme A, but is not active towards acetyl-coenzyme A.
Publication Abstract from PubMed
TesA from Pseudomonas aeruginosa belongs to the GDSL hydrolase family of serine esterases and lipases that possess a broad substrate- and regiospecificity. It shows high sequence homology to TAP, a multifunctional enzyme from Escherichia coli exhibiting thioesterase, lysophospholipase A, protease and arylesterase activities. Recently, we demonstrated high arylesterase activity for TesA, but only minor thioesterase and no protease activity. Here, we present a comparative analysis of TesA and TAP at the structural, biochemical and physiological levels. The crystal structure of TesA was determined at 1.9 A and structural differences were identified, providing a possible explanation for the differences in substrate specificities. The comparison of TesA with other GDSL-hydrolase structures revealed that the flexibility of active-site loops significantly affects their substrate specificity. This assumption was tested using a rational approach: we have engineered the putative coenzyme A thioester binding site of E. coli TAP into TesA of P. aeruginosa by introducing mutations D17S and L162R. This TesA variant showed increased thioesterase activity comparable to that of TAP. TesA is the first lysophospholipase A described for the opportunistic human pathogen P. aeruginosa. The enzyme is localized in the periplasm and may exert important functions in the homeostasis of phospholipids or detoxification of lysophospholipids.
Structural and Functional Characterisation of TesA - A Novel Lysophospholipase A from Pseudomonas aeruginosa.,Kovacic F, Granzin J, Wilhelm S, Kojic-Prodic B, Batra-Safferling R, Jaeger KE PLoS One. 2013 Jul 18;8(7):e69125. doi: 10.1371/journal.pone.0069125. Print 2013. PMID:23874889[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Kovacic F, Granzin J, Wilhelm S, Kojic-Prodic B, Batra-Safferling R, Jaeger KE. Structural and Functional Characterisation of TesA - A Novel Lysophospholipase A from Pseudomonas aeruginosa. PLoS One. 2013 Jul 18;8(7):e69125. doi: 10.1371/journal.pone.0069125. Print 2013. PMID:23874889 doi:10.1371/journal.pone.0069125
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