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| [[Image:1sb6.jpg|left|200px]]
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| {{Structure
| | ==Solution structure of a cyanobacterial copper metallochaperone, ScAtx1== |
| |PDB= 1sb6 |SIZE=350|CAPTION= <scene name='initialview01'>1sb6</scene>
| | <StructureSection load='1sb6' size='340' side='right'caption='[[1sb6]]' scene=''> |
| |SITE=
| | == Structural highlights == |
| |LIGAND=
| | <table><tr><td colspan='2'>[[1sb6]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Synechocystis_sp._PCC_6803 Synechocystis sp. PCC 6803]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1SB6 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1SB6 FirstGlance]. <br> |
| |ACTIVITY= | | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</td></tr> |
| |GENE=
| | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1sb6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1sb6 OCA], [https://pdbe.org/1sb6 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1sb6 RCSB], [https://www.ebi.ac.uk/pdbsum/1sb6 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1sb6 ProSAT]</span></td></tr> |
| |DOMAIN=
| | </table> |
| |RELATEDENTRY=
| | == Function == |
| |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1sb6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1sb6 OCA], [http://www.ebi.ac.uk/pdbsum/1sb6 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1sb6 RCSB]</span>
| | [https://www.uniprot.org/uniprot/P73213_SYNY3 P73213_SYNY3] |
| }}
| | == Evolutionary Conservation == |
| | | [[Image:Consurf_key_small.gif|200px|right]] |
| '''Solution structure of a cyanobacterial copper metallochaperone, ScAtx1'''
| | Check<jmol> |
| | | <jmolCheckbox> |
| | | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/sb/1sb6_consurf.spt"</scriptWhenChecked> |
| ==Overview== | | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> |
| The Atx1 copper metallochaperone from Synechocystis PCC 6803, ScAtx1, interacts with two P(1)-type copper ATPases to supply copper proteins within intracellular compartments, avoiding ATPases for other metals en route. Here we report NMR-derived solution structures for ScAtx1. The monomeric apo form has a betaalphabetabetaalpha fold with backbone motions largely restricted to loop 1 containing Cys-12 and Cys-15. The tumbling rate of Cu(I)ScAtx1 (0.1-0.8 mm) implies dimers. Experimental restraints are satisfied by symmetrical dimers with Cys-12 or His-61, but not Cys-15, invading the copper site of the opposing subunit. A full sequence of copper ligands from the cell surface to thylakoid compartments is proposed, considering in vitro homodimer liganding to mimic in vivo liganding in ScAtx1-ATPase heterodimers. A monomeric high resolution structure for Cu(I)ScAtx1, with Cys-12, Cys-15, and His-61 as ligands, is calculated without violations despite the rotational correlation time. (2)J(NH) couplings in the imidazole ring of His-61 establish coordination of N(epsilon2) to copper. His-61 is analogous to Lys-65 in eukaryotic metallochaperones, stabilizing Cu(I)S(2) complexes but by binding Cu(I) rather than compensating charge. Cys-Cys-His ligand sets are an emergent theme in some copper metallochaperones, although not in related Atx1, CopZ, or Hah1. Surface charge (Glu-13) close to the metal-binding site of ScAtx1 is likely to support interaction with complementary surfaces of copper-transporting ATPases (PacS-Arg-11 and CtaA-Lys-14) but to discourage interaction with zinc ATPase ZiaA and so inhibit aberrant formation of copper-ZiaA complexes.
| | <text>to colour the structure by Evolutionary Conservation</text> |
| | | </jmolCheckbox> |
| ==About this Structure== | | </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=1sb6 ConSurf]. |
| 1SB6 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Synechocystis_sp. Synechocystis sp.]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1SB6 OCA].
| | <div style="clear:both"></div> |
| | | __TOC__ |
| ==Reference==
| | </StructureSection> |
| Solution structures of a cyanobacterial metallochaperone: insight into an atypical copper-binding motif., Banci L, Bertini I, Ciofi-Baffoni S, Su XC, Borrelly GP, Robinson NJ, J Biol Chem. 2004 Jun 25;279(26):27502-10. Epub 2004 Apr 8. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15075318 15075318]
| | [[Category: Large Structures]] |
| [[Category: Single protein]] | | [[Category: Synechocystis sp. PCC 6803]] |
| [[Category: Synechocystis sp.]] | | [[Category: Banci L]] |
| [[Category: Banci, L.]] | | [[Category: Bertini I]] |
| [[Category: Bertini, I.]] | | [[Category: Borrelly GP]] |
| [[Category: Borrelly, G P.]] | | [[Category: Ciofi-Baffoni S]] |
| [[Category: Ciofi-Baffoni, S.]] | | [[Category: Robinson NJ]] |
| [[Category: Robinson, N J.]] | | [[Category: Su XC]] |
| [[Category: SPINE, Structural Proteomics in Europe.]]
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| [[Category: Su, X C.]] | |
| [[Category: copper chaperone]]
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| [[Category: new metal binding motif]]
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| [[Category: nmr]]
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| [[Category: spine]]
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| [[Category: structural genomic]]
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| [[Category: structural proteomics in europe]]
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| [[Category: structure]]
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| ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 23:39:41 2008''
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