2ofg: Difference between revisions
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< | ==Solution structure of the n-terminal domain of the zinc(II) ATPase ziaa in its apo form== | ||
<StructureSection load='2ofg' size='340' side='right'caption='[[2ofg]]' scene=''> | |||
You may | == Structural highlights == | ||
<table><tr><td colspan='2'>[[2ofg]] 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=2OFG OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2OFG FirstGlance]. <br> | |||
or | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</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=2ofg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ofg OCA], [https://pdbe.org/2ofg PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ofg RCSB], [https://www.ebi.ac.uk/pdbsum/2ofg PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ofg ProSAT]</span></td></tr> | ||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/ATZN_SYNY3 ATZN_SYNY3] | |||
== Evolutionary Conservation == | |||
[[Image:Consurf_key_small.gif|200px|right]] | |||
Check<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/of/2ofg_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<text>to colour the structure by Evolutionary Conservation</text> | |||
</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/main_output.php?pdb_ID=2ofg ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
A Cu(I) metallochaperone, Atx1, interacts with the amino-terminal domain of a Cu(I)-transporting ATPase, PacS(N), but not with a domain of related Zn-transporting ATPase, ZiaA(N) in Synechocystis PCC 6803. This is thought to prevent ZiaA(N) from acquiring Cu(I), which it binds more tightly than Zn. Solution structures of Atx1, PacS(N), and the heterodimer were previously described. Here we report solution structural studies of the ZiaA(N) soluble domain. Apo-ZiaA(N) has a typical ferredoxin-like fold followed by an atypical 34 residues of unstructured polypeptide containing a His(7) motif. ZiaA(N) competes with the metallochromic indicator 4-(2-pyridylazo)resorcinol for 1 equiv of Zn, which can be displaced by thiol-modifying p-mercuriphenylsulfonic acid, establishing that a high-affinity site involves thiols of the CXXC motif within the ferredoxin-like fold. A single equivalent of Zn affects nuclear magnetic resonance signals arising from the CXXC motif as well as all seven His residues. The presence of NMR-line broadening in both sites implies that Zn(1)-ZiaA(N) undergoes exchange phenomena, consistent with CXXC-bound Zn coincidentally sampling various His ligands. These Zn-dependent dynamic changes could either aid metal transfer or alter intramolecular interactions. No formation of Atx1-Cu(I)-ZiaA(N) heterodimers was observed, and in the presence of equimolar ZiaA(N) and PacS(N), only Atx1-Cu(I)-PacS(N) complexes were detected. Residues flanking the CXXC motif of PacS(N) (R(13)-ASS(20)) differ in charge and bulk from those of ZiaA(N) (D(18)-KLK(25)) and make contacts in the Atx1-Cu(I)-PacS(N) complex. Crucially, swapping these residues flanking the CXXC motifs of ZiaA(N) and PacS(N) reciprocally swaps partner choice by Atx1. These few residues of the two ATPases have diverged during evolution to bias Atx1 interactions in favor of PacS(N) rather than ZiaA(N.). | |||
NMR structural analysis of the soluble domain of ZiaA-ATPase and the basis of selective interactions with copper metallochaperone Atx1.,Banci L, Bertini I, Ciofi-Baffoni S, Poggi L, Vanarotti M, Tottey S, Waldron KJ, Robinson NJ J Biol Inorg Chem. 2010 Jan;15(1):87-98. Epub 2009 Jul 16. PMID:19609573<ref>PMID:19609573</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 2ofg" style="background-color:#fffaf0;"></div> | |||
== | ==See Also== | ||
*[[ATPase 3D structures|ATPase 3D structures]] | |||
[[Category: | == References == | ||
[[Category: Synechocystis sp. | <references/> | ||
__TOC__ | |||
[[Category: Banci | </StructureSection> | ||
[[Category: Bertini | [[Category: Large Structures]] | ||
[[Category: Ciofi-Baffoni | [[Category: Synechocystis sp. PCC 6803]] | ||
[[Category: Poggi | [[Category: Banci L]] | ||
[[Category: Robinson | [[Category: Bertini I]] | ||
[[Category: Vanarotti | [[Category: Ciofi-Baffoni S]] | ||
[[Category: Poggi L]] | |||
[[Category: Robinson NJ]] | |||
[[Category: Vanarotti M]] | |||
Latest revision as of 03:18, 28 December 2023
Solution structure of the n-terminal domain of the zinc(II) ATPase ziaa in its apo formSolution structure of the n-terminal domain of the zinc(II) ATPase ziaa in its apo form
Structural highlights
FunctionEvolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedA Cu(I) metallochaperone, Atx1, interacts with the amino-terminal domain of a Cu(I)-transporting ATPase, PacS(N), but not with a domain of related Zn-transporting ATPase, ZiaA(N) in Synechocystis PCC 6803. This is thought to prevent ZiaA(N) from acquiring Cu(I), which it binds more tightly than Zn. Solution structures of Atx1, PacS(N), and the heterodimer were previously described. Here we report solution structural studies of the ZiaA(N) soluble domain. Apo-ZiaA(N) has a typical ferredoxin-like fold followed by an atypical 34 residues of unstructured polypeptide containing a His(7) motif. ZiaA(N) competes with the metallochromic indicator 4-(2-pyridylazo)resorcinol for 1 equiv of Zn, which can be displaced by thiol-modifying p-mercuriphenylsulfonic acid, establishing that a high-affinity site involves thiols of the CXXC motif within the ferredoxin-like fold. A single equivalent of Zn affects nuclear magnetic resonance signals arising from the CXXC motif as well as all seven His residues. The presence of NMR-line broadening in both sites implies that Zn(1)-ZiaA(N) undergoes exchange phenomena, consistent with CXXC-bound Zn coincidentally sampling various His ligands. These Zn-dependent dynamic changes could either aid metal transfer or alter intramolecular interactions. No formation of Atx1-Cu(I)-ZiaA(N) heterodimers was observed, and in the presence of equimolar ZiaA(N) and PacS(N), only Atx1-Cu(I)-PacS(N) complexes were detected. Residues flanking the CXXC motif of PacS(N) (R(13)-ASS(20)) differ in charge and bulk from those of ZiaA(N) (D(18)-KLK(25)) and make contacts in the Atx1-Cu(I)-PacS(N) complex. Crucially, swapping these residues flanking the CXXC motifs of ZiaA(N) and PacS(N) reciprocally swaps partner choice by Atx1. These few residues of the two ATPases have diverged during evolution to bias Atx1 interactions in favor of PacS(N) rather than ZiaA(N.). NMR structural analysis of the soluble domain of ZiaA-ATPase and the basis of selective interactions with copper metallochaperone Atx1.,Banci L, Bertini I, Ciofi-Baffoni S, Poggi L, Vanarotti M, Tottey S, Waldron KJ, Robinson NJ J Biol Inorg Chem. 2010 Jan;15(1):87-98. Epub 2009 Jul 16. PMID:19609573[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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