1tv7

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[[Image:1tv7.gif|left|200px]]
 
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==Structure of the S-adenosylmethionine dependent Enzyme MoaA==
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The line below this paragraph, containing "STRUCTURE_1tv7", creates the "Structure Box" on the page.
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<StructureSection load='1tv7' size='340' side='right'caption='[[1tv7]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1tv7]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Staphylococcus_aureus Staphylococcus aureus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TV7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1TV7 FirstGlance]. <br>
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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]] 2.8&#8491;</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=SF4:IRON/SULFUR+CLUSTER'>SF4</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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{{STRUCTURE_1tv7| PDB=1tv7 | SCENE= }}
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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=1tv7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1tv7 OCA], [https://pdbe.org/1tv7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1tv7 RCSB], [https://www.ebi.ac.uk/pdbsum/1tv7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1tv7 ProSAT]</span></td></tr>
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</table>
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'''Structure of the S-adenosylmethionine dependent Enzyme MoaA'''
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== Function ==
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[https://www.uniprot.org/uniprot/MOAA_STAA8 MOAA_STAA8] Catalyzes, together with MoaC, the conversion of 5'-GTP to cyclic pyranopterin monophosphate (cPMP or molybdopterin precursor Z).<ref>PMID:15317939</ref>
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== Evolutionary Conservation ==
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==Overview==
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[[Image:Consurf_key_small.gif|200px|right]]
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The MoaA and MoaC proteins catalyze the first step during molybdenum cofactor biosynthesis, the conversion of a guanosine derivative to precursor Z. MoaA belongs to the S-adenosylmethionine (SAM)-dependent radical enzyme superfamily, members of which catalyze the formation of protein and/or substrate radicals by reductive cleavage of SAM by a [4Fe-4S] cluster. A defined in vitro system is described, which generates precursor Z and led to the identification of 5'-GTP as the substrate. The structures of MoaA in the apo-state (2.8 angstroms) and in complex with SAM (2.2 angstroms) provide valuable insights into its mechanism and help to define the defects caused by mutations in the human ortholog of MoaA that lead to molybdenum cofactor deficiency, a usually fatal disease accompanied by severe neurological symptoms. The central core of each subunit of the MoaA dimer is an incomplete triosephosphate isomerase barrel formed by the N-terminal part of the protein, which contains the [4Fe-4S] cluster typical for SAM-dependent radical enzymes. SAM is the fourth ligand to the cluster and binds to its unique Fe as an N/O chelate. The lateral opening of the incomplete triosephosphate isomerase barrel is covered by the C-terminal part of the protein containing an additional [4Fe-4S] cluster, which is unique to MoaA proteins. Both FeS clusters are separated by approximately 17 angstroms, with a large active site pocket between. The noncysteinyl-ligated unique Fe site of the C-terminal [4Fe-4S] cluster is proposed to be involved in the binding and activation of 5'-GTP.
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Check<jmol>
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<jmolCheckbox>
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==About this Structure==
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/tv/1tv7_consurf.spt"</scriptWhenChecked>
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1TV7 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Staphylococcus_aureus Staphylococcus aureus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TV7 OCA].
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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==Reference==
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</jmolCheckbox>
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Crystal structure of the S-adenosylmethionine-dependent enzyme MoaA and its implications for molybdenum cofactor deficiency in humans., Hanzelmann P, Schindelin H, Proc Natl Acad Sci U S A. 2004 Aug 31;101(35):12870-5. Epub 2004 Aug 18. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15317939 15317939]
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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=1tv7 ConSurf].
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[[Category: Single protein]]
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<div style="clear:both"></div>
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
[[Category: Staphylococcus aureus]]
[[Category: Staphylococcus aureus]]
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[[Category: Haenzelmann, P.]]
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[[Category: Haenzelmann P]]
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[[Category: Schindelin, H.]]
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[[Category: Schindelin H]]
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[[Category: Tim barrel]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 10:24:30 2008''
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Current revision

Structure of the S-adenosylmethionine dependent Enzyme MoaA

PDB ID 1tv7

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