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<StructureSection load='1mf0' size='340' side='right'caption='[[1mf0]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
<StructureSection load='1mf0' size='340' side='right'caption='[[1mf0]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[1mf0]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Lk3_transgenic_mice Lk3 transgenic mice]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MF0 OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1MF0 FirstGlance]. <br>
<table><tr><td colspan='2'>[[1mf0]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MF0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1MF0 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=AMP:ADENOSINE+MONOPHOSPHATE'>AMP</scene>, <scene name='pdbligand=GDP:GUANOSINE-5-DIPHOSPHATE'>GDP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</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]] 2.5&#8491;</td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1mez|1mez]], [[1mf1|1mf1]]</div></td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=AMP:ADENOSINE+MONOPHOSPHATE'>AMP</scene>, <scene name='pdbligand=GDP:GUANOSINE-5-DIPHOSPHATE'>GDP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene></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='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1mf0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mf0 OCA], [https://pdbe.org/1mf0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1mf0 RCSB], [https://www.ebi.ac.uk/pdbsum/1mf0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1mf0 ProSAT]</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://proteopedia.org/fgij/fg.htm?mol=1mf0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mf0 OCA], [http://pdbe.org/1mf0 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1mf0 RCSB], [http://www.ebi.ac.uk/pdbsum/1mf0 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1mf0 ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/PURA1_MOUSE 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.<ref>PMID:12482871</ref>
[https://www.uniprot.org/uniprot/PURA1_MOUSE 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.<ref>PMID:12482871</ref>  
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
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</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=1mf0 ConSurf].
</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=1mf0 ConSurf].
<div style="clear:both"></div>
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Adenylosuccinate 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<ref>PMID:12186864</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 1mf0" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Adenylosuccinate synthase]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Lk3 transgenic mice]]
[[Category: Mus musculus]]
[[Category: Borza, T]]
[[Category: Borza T]]
[[Category: Fromm, H J]]
[[Category: Fromm HJ]]
[[Category: Honzatko, R B]]
[[Category: Honzatko RB]]
[[Category: Iancu, C V]]
[[Category: Iancu CV]]
[[Category: Gtp-binding]]
[[Category: Ligase]]
[[Category: Multigene family]]
[[Category: Purine biosynthesis]]

Latest revision as of 13:26, 13 March 2024

Structure of the Recombinant Mouse-Muscle Adenylosuccinate Synthetase Complexed with AMP, GDP, HPO4(2-), and Mg(2+)

1mf0, resolution 2.50Å

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