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3x1j

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==Crystal Structure of Phosphopantetheine adenylyltransferase (PPAT/CoaD) with AcCoA from Pseudomonas aeruginosa==
==Crystal Structure of Phosphopantetheine adenylyltransferase (PPAT/CoaD) with AcCoA from Pseudomonas aeruginosa==
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<StructureSection load='3x1j' size='340' side='right' caption='[[3x1j]], [[Resolution|resolution]] 2.33&Aring;' scene=''>
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<StructureSection load='3x1j' size='340' side='right'caption='[[3x1j]], [[Resolution|resolution]] 2.33&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[3x1j]] is a 3 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3X1J OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3X1J FirstGlance]. <br>
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<table><tr><td colspan='2'>[[3x1j]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Pseudomonas_aeruginosa_2192 Pseudomonas aeruginosa 2192]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3X1J OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3X1J FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACO:ACETYL+COENZYME+*A'>ACO</scene>, <scene name='pdbligand=DMS:DIMETHYL+SULFOXIDE'>DMS</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.334&#8491;</td></tr>
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3x1k|3x1k]], [[3x1m|3x1m]], [[4ruk|4ruk]]</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACO:ACETYL+COENZYME+*A'>ACO</scene>, <scene name='pdbligand=DMS:DIMETHYL+SULFOXIDE'>DMS</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene></td></tr>
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<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Pantetheine-phosphate_adenylyltransferase Pantetheine-phosphate adenylyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.3 2.7.7.3] </span></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3x1j FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3x1j OCA], [https://pdbe.org/3x1j PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3x1j RCSB], [https://www.ebi.ac.uk/pdbsum/3x1j PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3x1j ProSAT]</span></td></tr>
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<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=3x1j FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3x1j OCA], [http://pdbe.org/3x1j PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3x1j RCSB], [http://www.ebi.ac.uk/pdbsum/3x1j PDBsum]</span></td></tr>
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</table>
</table>
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<div style="background-color:#fffaf0;">
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== Function ==
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== Publication Abstract from PubMed ==
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[https://www.uniprot.org/uniprot/A0A0X1KGP2_PSEAI A0A0X1KGP2_PSEAI] Reversibly transfers an adenylyl group from ATP to 4'-phosphopantetheine, yielding dephospho-CoA (dPCoA) and pyrophosphate.[HAMAP-Rule:MF_00151]
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BACKGROUND: Phosphopantetheine adenylyltransferase (PPAT) is a rate limiting enzyme which catalyzes the conversion of ATP and pantetheine to dephosphocoenzyme and pyrophosphate. The enzyme is allosteric in nature and regulated by Coenzyme A (CoA) through feedback inhibition. So far, several structures have been solved to decipher the catalytic mechanism of this enzyme. METHODS: To address catalytic and inhibitory mechanisms of PPAT, structural insights from single crystal X-ray diffraction method were primarily used, followed by biophysical and biochemical analysis. RESULTS: We have solved the structures of PPAT from Pseudomonas aeruginosa with its substrate analogue AMP-PNP and inhibitor CoA. For the first time, a co-crystal structure of PPAT with Acetyl-CoA (AcCoA) was determined. Enzymatic analysis was performed to decipher the catalytic, allosteric and inhibitory mechanisms involved in regulation of PPAT. Binding affinities of PPAT with its substrates and inhibitors were determined by SPR. CONCLUSION: Previous studies from Escherichia coli and Arabidopsis indicated the inhibitory activity of AcCoA. PPAT-AcCoA structure along with some biochemical methods established AcCoA as an inhibitor to PPAT and illustrated its inhibitory mechanism. Transition from catalytic to allosteric state involves formation of ternary complex. We have studied the structural features of the ternary complex of PPAT along with its product pyrophosphate and inhibitor CoA and validated it with other biophysical and biochemical methods. Extensive analysis of all these 3D structures indicates that changes in side chains R90 and D94 are responsible for transition between catalytic and allosteric inhibitory states. GENERAL SIGNIFICANCE: These enzymatic studies provide new insights into the allosteric mechanism of PPAT.
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Transition of phosphopantetheine adenylyltransferase from catalytic to allosteric state is characterized by ternary complex formation in Pseudomonas aeruginosa.,Chatterjee R, Mondal A, Basu A, Datta S Biochim Biophys Acta. 2016 Apr 13;1864(7):773-786. doi:, 10.1016/j.bbapap.2016.03.018. PMID:27041211<ref>PMID:27041211</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 3x1j" style="background-color:#fffaf0;"></div>
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== References ==
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<references/>
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: Pantetheine-phosphate adenylyltransferase]]
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[[Category: Large Structures]]
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[[Category: Chatterjee, R]]
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[[Category: Pseudomonas aeruginosa 2192]]
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[[Category: Datta, S]]
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[[Category: Chatterjee R]]
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[[Category: Rossmann fold]]
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[[Category: Datta S]]
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[[Category: Transferase]]
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Current revision

Crystal Structure of Phosphopantetheine adenylyltransferase (PPAT/CoaD) with AcCoA from Pseudomonas aeruginosa

PDB ID 3x1j

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