1mf1: Difference between revisions
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==Structure of the Recombinant Mouse-Muscle Adenylosuccinate Synthetase Complexed with AMP== | ==Structure of the Recombinant Mouse-Muscle Adenylosuccinate Synthetase Complexed with AMP== | ||
<StructureSection load='1mf1' size='340' side='right' caption='[[1mf1]], [[Resolution|resolution]] 2.70Å' scene=''> | <StructureSection load='1mf1' size='340' side='right' caption='[[1mf1]], [[Resolution|resolution]] 2.70Å' scene=''> | ||
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<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Adss1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice])</td></tr> | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Adss1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice])</td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Adenylosuccinate_synthase Adenylosuccinate synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.3.4.4 6.3.4.4] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Adenylosuccinate_synthase Adenylosuccinate synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.3.4.4 6.3.4.4] </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=1mf1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mf1 OCA], [http://pdbe.org/1mf1 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1mf1 RCSB], [http://www.ebi.ac.uk/pdbsum/1mf1 PDBsum]</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=1mf1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mf1 OCA], [http://pdbe.org/1mf1 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1mf1 RCSB], [http://www.ebi.ac.uk/pdbsum/1mf1 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1mf1 ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
</jmolCheckbox> | </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/ | </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=1mf1 ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
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</div> | </div> | ||
<div class="pdbe-citations 1mf1" style="background-color:#fffaf0;"></div> | <div class="pdbe-citations 1mf1" style="background-color:#fffaf0;"></div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 16:52, 12 October 2017
Structure of the Recombinant Mouse-Muscle Adenylosuccinate Synthetase Complexed with AMPStructure of the Recombinant Mouse-Muscle Adenylosuccinate Synthetase Complexed with AMP
Structural highlights
Function[PURA1_MOUSE] Component of the purine nucleotide cycle (PNC), which interconverts IMP and AMP to regulate the nucleotide levels in various tissues, and which contributes to glycolysis and ammoniagenesis. Catalyzes the first committed step in the biosynthesis of AMP from IMP.[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 PubMedAdenylosuccinate synthetase governs the committed step of AMP biosynthesis, the generation of 6-phosphoryl-IMP from GTP and IMP followed by the formation of adenylosuccinate from 6-phosphoryl-IMP and l-aspartate. The enzyme is subject to feedback inhibition by AMP and adenylosuccinate, but crystallographic complexes of the mouse muscle synthetase presented here infer mechanisms of inhibition that involve potentially synergistic ligand combinations. AMP alone adopts the productive binding mode of IMP and yet stabilizes the active site in a conformation that favors the binding of Mg(2+)-IMP to the GTP pocket. On the other hand, AMP, in the presence of GDP, orthophosphate, and Mg(2+), adopts the binding mode of adenylosuccinate. Depending on circumstances then, AMP behaves as an analogue of IMP or as an analogue of adenylosuccinate. The complex of adenylosuccinate.GDP.Mg(2+).sulfate, the first structure of an adenylosuccinate-bound synthetase, reveals significant geometric distortions and tight nonbonded contacts relevant to the proposed catalytic mechanism. Adenylosuccinate forms from 6-phosphoryl-IMP and l-aspartate by the movement of the purine ring into the alpha-amino group of l-aspartate. Feedback inhibition and product complexes of recombinant mouse muscle adenylosuccinate synthetase.,Iancu CV, Borza T, Fromm HJ, Honzatko RB J Biol Chem. 2002 Oct 25;277(43):40536-43. Epub 2002 Aug 16. PMID:12186864[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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