2wp0: Difference between revisions
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< | ==Crystal structure of a HobA-DnaA (domain I-II) complex from Helicobacter pylori.== | ||
<StructureSection load='2wp0' size='340' side='right'caption='[[2wp0]], [[Resolution|resolution]] 2.67Å' scene=''> | |||
You may | == Structural highlights == | ||
<table><tr><td colspan='2'>[[2wp0]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Helicobacter_pylori Helicobacter pylori]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2WP0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2WP0 FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.67Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene></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=2wp0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2wp0 OCA], [https://pdbe.org/2wp0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2wp0 RCSB], [https://www.ebi.ac.uk/pdbsum/2wp0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2wp0 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/O25828_HELPY O25828_HELPY] | |||
== 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/wp/2wp0_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=2wp0 ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Bacterial DNA replication requires DnaA, an AAA+ ATPase that initiates replication at a specific chromosome region, oriC, and is regulated by species-specific regulators that directly bind DnaA. HobA is a DnaA binding protein, recently identified as an essential regulator of DNA replication in Helicobacter pylori. We report the crystal structure of HobA in complex with domains I and II of DnaA (DnaA(I-II)) from H. pylori, the first structure of DnaA bound to one of its regulators. Biochemical characterization of the complex formed shows that a tetramer of HobA binds four DnaA(I-II) molecules, and that DnaA(I-II) is unable to oligomerize by itself. Mutagenesis and protein-protein interaction studies demonstrate that some of the residues located at the HobA-DnaA(I-II) interface in the structure are necessary for complex formation. Introduction of selected mutations into H. pylori shows that the disruption of the interaction between HobA and DnaA is lethal for the bacteria. Remarkably, the DnaA binding site of HobA is conserved in DiaA from Escherichia coli, suggesting that the structure of the HobA/DnaA complex represents a model for DnaA regulation in other Gram-negative bacteria. Our data, together with those from other studies, indicate that HobA could play a crucial scaffolding role during the initiation of replication in H. pylori by organizing the first step of DnaA oligomerization and attachment to oriC. | |||
The structure of a DnaA/HobA complex from Helicobacter pylori provides insight into regulation of DNA replication in bacteria.,Natrajan G, Noirot-Gros MF, Zawilak-Pawlik A, Kapp U, Terradot L Proc Natl Acad Sci U S A. 2009 Nov 25. PMID:19940251<ref>PMID:19940251</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 2wp0" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[DnaA|DnaA]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
== | |||
== | |||
< | |||
[[Category: Helicobacter pylori]] | [[Category: Helicobacter pylori]] | ||
[[Category: Kapp | [[Category: Large Structures]] | ||
[[Category: Natrajan | [[Category: Kapp U]] | ||
[[Category: Noirot-Gros | [[Category: Natrajan G]] | ||
[[Category: Terradot | [[Category: Noirot-Gros M-F]] | ||
[[Category: Zawilak-Pawlik | [[Category: Terradot L]] | ||
[[Category: Zawilak-Pawlik A]] | |||
Latest revision as of 13:12, 20 December 2023
Crystal structure of a HobA-DnaA (domain I-II) complex from Helicobacter pylori.Crystal structure of a HobA-DnaA (domain I-II) complex from Helicobacter pylori.
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 PubMedBacterial DNA replication requires DnaA, an AAA+ ATPase that initiates replication at a specific chromosome region, oriC, and is regulated by species-specific regulators that directly bind DnaA. HobA is a DnaA binding protein, recently identified as an essential regulator of DNA replication in Helicobacter pylori. We report the crystal structure of HobA in complex with domains I and II of DnaA (DnaA(I-II)) from H. pylori, the first structure of DnaA bound to one of its regulators. Biochemical characterization of the complex formed shows that a tetramer of HobA binds four DnaA(I-II) molecules, and that DnaA(I-II) is unable to oligomerize by itself. Mutagenesis and protein-protein interaction studies demonstrate that some of the residues located at the HobA-DnaA(I-II) interface in the structure are necessary for complex formation. Introduction of selected mutations into H. pylori shows that the disruption of the interaction between HobA and DnaA is lethal for the bacteria. Remarkably, the DnaA binding site of HobA is conserved in DiaA from Escherichia coli, suggesting that the structure of the HobA/DnaA complex represents a model for DnaA regulation in other Gram-negative bacteria. Our data, together with those from other studies, indicate that HobA could play a crucial scaffolding role during the initiation of replication in H. pylori by organizing the first step of DnaA oligomerization and attachment to oriC. The structure of a DnaA/HobA complex from Helicobacter pylori provides insight into regulation of DNA replication in bacteria.,Natrajan G, Noirot-Gros MF, Zawilak-Pawlik A, Kapp U, Terradot L Proc Natl Acad Sci U S A. 2009 Nov 25. PMID:19940251[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences |
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