1gn8: Difference between revisions

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-[[Image:1gn8.gif|left|200px]]<br />
-<applet load="1gn8" size="450" color="white" frame="true" align="right" spinBox="true"
-caption="1gn8, resolution 1.83&Aring;" />
-'''PHOSPHOPANTETHEINE ADENYLYLTRANSFERASE IN COMPLEX WITH MN2+ ATP FROM ESCHERICHIA COLI'''<br />
-==Overview==
+==PHOSPHOPANTETHEINE ADENYLYLTRANSFERASE IN COMPLEX WITH Mn2+ATP FROM ESCHERICHIA COLI==
-Phosphopantetheine adenylyltransferase (PPAT) is an essential enzyme in, the coenzyme A pathway that catalyzes the reversible transfer of an, adenylyl group from ATP to 4'-phosphopantetheine (Ppant) in the presence, of magnesium. To investigate the reaction mechanism, the high-resolution, crystal structures of the Escherichia coli PPAT have been determined in, the presence of either ATP or Ppant. Structural details of the catalytic, center revealed specific roles for individual amino acid residues involved, in substrate binding and catalysis. The side-chain of His18 stabilizes the, expected pentacovalent intermediate, whereas the side-chains of Thr10 and, Lys42 orient the nucleophile for an in-line displacement mechanism. The, binding site for the manganese ion that interacts with the phosphate, groups of the nucleotide has also been identified. Within the PPAT, hexamer, one trimer is in its substrate-free state, whereas the other is, in a substrate-bound state.
+<StructureSection load='1gn8' size='340' side='right'caption='[[1gn8]], [[Resolution|resolution]] 1.83&Aring;' scene=''>
+== Structural highlights ==
+<table><tr><td colspan='2'>[[1gn8]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GN8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1GN8 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]] 1.83&#8491;</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ATP:ADENOSINE-5-TRIPHOSPHATE'>ATP</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=1gn8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1gn8 OCA], [https://pdbe.org/1gn8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1gn8 RCSB], [https://www.ebi.ac.uk/pdbsum/1gn8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1gn8 ProSAT]</span></td></tr>
+</table>
+== Function ==
+[https://www.uniprot.org/uniprot/COAD_ECOLI COAD_ECOLI] Reversibly transfers an adenylyl group from ATP to 4'-phosphopantetheine, yielding dephospho-CoA (dPCoA) and pyrophosphate.
+== Evolutionary Conservation ==
+[[Image:Consurf_key_small.gif|200px|right]]
+Check<jmol>
+  <jmolCheckbox>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/gn/1gn8_consurf.spt"</scriptWhenChecked>
+    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
+    <text>to colour the structure by Evolutionary Conservation</text>
+  </jmolCheckbox>
+</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1gn8 ConSurf].
+<div style="clear:both"></div>
+<div style="background-color:#fffaf0;">
+== Publication Abstract from PubMed ==
+Phosphopantetheine adenylyltransferase (PPAT) is an essential enzyme in the coenzyme A pathway that catalyzes the reversible transfer of an adenylyl group from ATP to 4'-phosphopantetheine (Ppant) in the presence of magnesium. To investigate the reaction mechanism, the high-resolution crystal structures of the Escherichia coli PPAT have been determined in the presence of either ATP or Ppant. Structural details of the catalytic center revealed specific roles for individual amino acid residues involved in substrate binding and catalysis. The side-chain of His18 stabilizes the expected pentacovalent intermediate, whereas the side-chains of Thr10 and Lys42 orient the nucleophile for an in-line displacement mechanism. The binding site for the manganese ion that interacts with the phosphate groups of the nucleotide has also been identified. Within the PPAT hexamer, one trimer is in its substrate-free state, whereas the other is in a substrate-bound state.
-==About this Structure==
+The crystal structures of phosphopantetheine adenylyltransferase with bound substrates reveal the enzyme's catalytic mechanism.,Izard T J Mol Biol. 2002 Jan 25;315(4):487-95. PMID:11812124<ref>PMID:11812124</ref>
-GN8 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] with SO4, MN and ATP as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [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] Structure known Active Site: ATA. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1GN8 OCA].
-==Reference==
+From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
-The crystal structures of phosphopantetheine adenylyltransferase with bound substrates reveal the enzyme's catalytic mechanism., Izard T, J Mol Biol. 2002 Jan 25;315(4):487-95. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=11812124 11812124]
+</div>
+<div class="pdbe-citations 1gn8" style="background-color:#fffaf0;"></div>
+== References ==
+<references/>
+__TOC__
+</StructureSection>
 [[Category: Escherichia coli]]
-[[Category: Pantetheine-phosphate adenylyltransferase]]
+[[Category: Large Structures]]
-[[Category: Single protein]]
+[[Category: Izard T]]
-[[Category: Izard, T.]]
-[[Category: ATP]]
-[[Category: MN]]
-[[Category: SO4]]
-[[Category: coenzyme a biosynthesis]]
-[[Category: nucleotidyltransferase]]
-[[Category: transferase]]
-''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Mon Nov  5 16:15:35 2007''