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| | ==Crystal structure of Salmonella enterica acetyl-CoA synthetase (Acs) in complex with cAMP and Coenzyme A== | | ==Crystal structure of Salmonella enterica acetyl-CoA synthetase (Acs) in complex with cAMP and Coenzyme A== |
| - | <StructureSection load='5jrh' size='340' side='right' caption='[[5jrh]], [[Resolution|resolution]] 1.64Å' scene=''> | + | <StructureSection load='5jrh' size='340' side='right'caption='[[5jrh]], [[Resolution|resolution]] 1.64Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[5jrh]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Salty Salty]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5JRH OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5JRH FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[5jrh]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Salmonella_enterica_subsp._enterica_serovar_Typhimurium_str._LT2 Salmonella enterica subsp. enterica serovar Typhimurium str. LT2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5JRH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5JRH FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BU3:(R,R)-2,3-BUTANEDIOL'>BU3</scene>, <scene name='pdbligand=CMP:ADENOSINE-3,5-CYCLIC-MONOPHOSPHATE'>CMP</scene>, <scene name='pdbligand=COA:COENZYME+A'>COA</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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]] 1.644Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">acs, STM4275 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=99287 SALTY])</td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BU3:(R,R)-2,3-BUTANEDIOL'>BU3</scene>, <scene name='pdbligand=CMP:ADENOSINE-3,5-CYCLIC-MONOPHOSPHATE'>CMP</scene>, <scene name='pdbligand=COA:COENZYME+A'>COA</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Acetate--CoA_ligase Acetate--CoA ligase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.2.1.1 6.2.1.1] </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=5jrh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5jrh OCA], [https://pdbe.org/5jrh PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5jrh RCSB], [https://www.ebi.ac.uk/pdbsum/5jrh PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5jrh 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=5jrh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5jrh OCA], [http://pdbe.org/5jrh PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5jrh RCSB], [http://www.ebi.ac.uk/pdbsum/5jrh PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5jrh ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/ACSA_SALTY ACSA_SALTY]] Catalyzes the conversion of acetate into acetyl-CoA (AcCoA), an essential intermediate at the junction of anabolic and catabolic pathways. Acs undergoes a two-step reaction. In the first half reaction, Acs combines acetate with ATP to form acetyl-adenylate (AcAMP) intermediate. In the second half reaction, it can then transfer the acetyl group from AcAMP to the sulfhydryl group of CoA, forming the product AcCoA.<ref>PMID:17497934</ref> Enables the cell to use acetate during aerobic growth to generate energy via the TCA cycle, and biosynthetic compounds via the glyoxylate shunt. Acetylates CheY, the response regulator involved in flagellar movement and chemotaxis (By similarity).<ref>PMID:17497934</ref> | + | [https://www.uniprot.org/uniprot/ACSA_SALTY ACSA_SALTY] Catalyzes the conversion of acetate into acetyl-CoA (AcCoA), an essential intermediate at the junction of anabolic and catabolic pathways. Acs undergoes a two-step reaction. In the first half reaction, Acs combines acetate with ATP to form acetyl-adenylate (AcAMP) intermediate. In the second half reaction, it can then transfer the acetyl group from AcAMP to the sulfhydryl group of CoA, forming the product AcCoA.<ref>PMID:17497934</ref> Enables the cell to use acetate during aerobic growth to generate energy via the TCA cycle, and biosynthetic compounds via the glyoxylate shunt. Acetylates CheY, the response regulator involved in flagellar movement and chemotaxis (By similarity).<ref>PMID:17497934</ref> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | </div> | | </div> |
| | <div class="pdbe-citations 5jrh" style="background-color:#fffaf0;"></div> | | <div class="pdbe-citations 5jrh" style="background-color:#fffaf0;"></div> |
| | + | |
| | + | ==See Also== |
| | + | *[[Acetyl-CoA synthetase 3D structures|Acetyl-CoA synthetase 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Acetate--CoA ligase]] | + | [[Category: Large Structures]] |
| - | [[Category: Salty]] | + | [[Category: Salmonella enterica subsp. enterica serovar Typhimurium str. LT2]] |
| - | [[Category: Shen, L]] | + | [[Category: Shen L]] |
| - | [[Category: Zhang, Y]] | + | [[Category: Zhang Y]] |
| - | [[Category: Acetyl-coenzyme some]]
| + | |
| - | [[Category: Acetyl-coenzyme a synthetase]]
| + | |
| - | [[Category: Amp-forming]]
| + | |
| - | [[Category: Camp]]
| + | |
| - | [[Category: Ligase]]
| + | |
| Structural highlights
Function
ACSA_SALTY Catalyzes the conversion of acetate into acetyl-CoA (AcCoA), an essential intermediate at the junction of anabolic and catabolic pathways. Acs undergoes a two-step reaction. In the first half reaction, Acs combines acetate with ATP to form acetyl-adenylate (AcAMP) intermediate. In the second half reaction, it can then transfer the acetyl group from AcAMP to the sulfhydryl group of CoA, forming the product AcCoA.[1] Enables the cell to use acetate during aerobic growth to generate energy via the TCA cycle, and biosynthetic compounds via the glyoxylate shunt. Acetylates CheY, the response regulator involved in flagellar movement and chemotaxis (By similarity).[2]
Publication Abstract from PubMed
The high-affinity biosynthetic pathway for converting acetate to acetyl-coenzyme A (acetyl-CoA) is catalyzed by the central metabolic enzyme acetyl-coenzyme A synthetase (Acs), which is finely regulated both at the transcriptional level via cyclic AMP (cAMP)-driven trans-activation and at the post-translational level via acetylation inhibition. In this study, we discovered that cAMP directly binds to Salmonella enterica Acs (SeAcs) and inhibits its activity in a substrate-competitive manner. In addition, cAMP binding increases SeAcs acetylation by simultaneously promoting Pat-dependent acetylation and inhibiting CobB-dependent deacetylation, resulting in enhanced SeAcs inhibition. A crystal structure study and site-directed mutagenesis analyses confirmed that cAMP binds to the ATP/AMP pocket of SeAcs, and restrains SeAcs in an open conformation. The cAMP contact residues are well conserved from prokaryotes to eukaryotes, suggesting a general regulatory mechanism of cAMP on Acs.
Cyclic AMP Inhibits the Activity and Promotes the Acetylation of Acetyl-CoA Synthetase through Competitive Binding to the ATP/AMP Pocket.,Han X, Shen L, Wang Q, Cen X, Wang J, Wu M, Li P, Zhao W, Zhang Y, Zhao G J Biol Chem. 2017 Jan 27;292(4):1374-1384. doi: 10.1074/jbc.M116.753640. Epub, 2016 Dec 14. PMID:27974467[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Reger AS, Carney JM, Gulick AM. Biochemical and crystallographic analysis of substrate binding and conformational changes in acetyl-CoA synthetase. Biochemistry. 2007 Jun 5;46(22):6536-46. Epub 2007 May 12. PMID:17497934 doi:http://dx.doi.org/10.1021/bi6026506
- ↑ Reger AS, Carney JM, Gulick AM. Biochemical and crystallographic analysis of substrate binding and conformational changes in acetyl-CoA synthetase. Biochemistry. 2007 Jun 5;46(22):6536-46. Epub 2007 May 12. PMID:17497934 doi:http://dx.doi.org/10.1021/bi6026506
- ↑ Han X, Shen L, Wang Q, Cen X, Wang J, Wu M, Li P, Zhao W, Zhang Y, Zhao G. Cyclic AMP Inhibits the Activity and Promotes the Acetylation of Acetyl-CoA Synthetase through Competitive Binding to the ATP/AMP Pocket. J Biol Chem. 2017 Jan 27;292(4):1374-1384. doi: 10.1074/jbc.M116.753640. Epub, 2016 Dec 14. PMID:27974467 doi:http://dx.doi.org/10.1074/jbc.M116.753640
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