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1r95

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[[Image:1r95.jpg|left|200px]]
 
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==Crystal Structure of IscA (native)==
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The line below this paragraph, containing "STRUCTURE_1r95", creates the "Structure Box" on the page.
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<StructureSection load='1r95' size='340' side='right'caption='[[1r95]], [[Resolution|resolution]] 2.65&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'>[[1r95]] 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=1R95 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1R95 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]] 2.65&#8491;</td></tr>
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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=1r95 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1r95 OCA], [https://pdbe.org/1r95 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1r95 RCSB], [https://www.ebi.ac.uk/pdbsum/1r95 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1r95 ProSAT]</span></td></tr>
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{{STRUCTURE_1r95| PDB=1r95 | SCENE= }}
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</table>
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== Function ==
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'''Crystal Structure of IscA (native)'''
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[https://www.uniprot.org/uniprot/ISCA_ECOLI ISCA_ECOLI] Is able to transfer iron-sulfur clusters to apo-ferredoxin. Multiple cycles of [2Fe2S] cluster formation and transfer are observed, suggesting that IscA acts catalytically. Recruits intracellular free iron so as to provide iron for the assembly of transient iron-sulfur cluster in IscU in the presence of IscS, L-cysteine and the thioredoxin reductase system TrxA/TrxB.[HAMAP-Rule:MF_01429]
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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==Overview==
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Check<jmol>
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IscA belongs to an ancient family of proteins responsible for iron-sulfur cluster assembly in essential metabolic pathways preserved throughout evolution. We report here the 2.3 A resolution crystal structure of Escherichia coli IscA, a novel fold in which mixed beta-sheets form a compact alpha-beta sandwich domain. In contrast to the highly mobile secondary structural elements within the bacterial Fe-S scaffold protein IscU, a protein which is thought to have a similar function, the great majority of the amino acids that are conserved in IscA homologues are located in elements that constitute a well-ordered fold. However, the 10-residue C-terminal tail segment that contains two invariant cysteines critical for the Fe-S-binding function of a cyanobacterial (Synechocystis PCC) IscA homologue is not ordered in our structure. In addition, the crystal packing reveals a helical assembly that is constructed from two possible tetrameric oligomers of IscA.
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/r9/1r95_consurf.spt"</scriptWhenChecked>
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==About this Structure==
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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1R95 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1R95 OCA].
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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==Reference==
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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=1r95 ConSurf].
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Crystal structure of the ancient, Fe-S scaffold IscA reveals a novel protein fold., Bilder PW, Ding H, Newcomer ME, Biochemistry. 2004 Jan 13;43(1):133-9. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/14705938 14705938]
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<div style="clear:both"></div>
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__TOC__
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</StructureSection>
[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Bilder, P W.]]
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[[Category: Bilder PW]]
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[[Category: Ding, H.]]
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[[Category: Ding H]]
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[[Category: Newcomer, M E.]]
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[[Category: Newcomer ME]]
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[[Category: Beta barrel]]
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[[Category: Iron-sulfur cluster protein]]
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[[Category: Pseudo-asymmetric motif]]
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[[Category: Tetrameric]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 07:13:57 2008''
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Current revision

Crystal Structure of IscA (native)

PDB ID 1r95

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