2hcb: Difference between revisions
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New page: left|200px<br /><applet load="2hcb" size="450" color="white" frame="true" align="right" spinBox="true" caption="2hcb, resolution 3.51Å" /> '''Structure of AMPPCP-... |
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== | ==Structure of AMPPCP-bound DnaA from Aquifex aeolicus== | ||
In bacteria, the initiation of replication is controlled by DnaA, a member | <StructureSection load='2hcb' size='340' side='right'caption='[[2hcb]], [[Resolution|resolution]] 3.51Å' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[2hcb]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Aquifex_aeolicus Aquifex aeolicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2HCB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2HCB 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]] 3.51Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACP:PHOSPHOMETHYLPHOSPHONIC+ACID+ADENYLATE+ESTER'>ACP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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=2hcb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2hcb OCA], [https://pdbe.org/2hcb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2hcb RCSB], [https://www.ebi.ac.uk/pdbsum/2hcb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2hcb ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/DNAA_AQUAE DNAA_AQUAE] Plays an important role in the initiation and regulation of chromosomal replication. Binds to the origin of replication; it binds specifically double-stranded DNA at a 9 bp consensus (dnaA box): 5'-TTATC[CA]A[CA]A-3'. DnaA binds to ATP and to acidic phospholipids (By similarity). | |||
== 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/hc/2hcb_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=2hcb ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
In bacteria, the initiation of replication is controlled by DnaA, a member of the ATPases associated with various cellular activities (AAA+) protein superfamily. ATP binding allows DnaA to transition from a monomeric state into a large oligomeric complex that remodels replication origins, triggers duplex melting and facilitates replisome assembly. The crystal structure of AMP-PCP-bound DnaA reveals a right-handed superhelix defined by specific protein-ATP interactions. The observed quaternary structure of DnaA, along with topology footprint assays, indicates that a right-handed DNA wrap is formed around the initiation nucleoprotein complex. This model clarifies how DnaA engages and unwinds bacterial origins and suggests that additional, regulatory AAA+ proteins engage DnaA at filament ends. Eukaryotic and archaeal initiators also have the structural elements that promote open-helix formation, indicating that a spiral, open-ring AAA+ assembly forms the core element of initiators in all domains of life. | |||
Structural basis for ATP-dependent DnaA assembly and replication-origin remodeling.,Erzberger JP, Mott ML, Berger JM Nat Struct Mol Biol. 2006 Aug;13(8):676-83. Epub 2006 Jul 9. PMID:16829961<ref>PMID:16829961</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 2hcb" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[DnaA|DnaA]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Aquifex aeolicus]] | [[Category: Aquifex aeolicus]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: Berger | [[Category: Berger JM]] | ||
[[Category: Erzberger | [[Category: Erzberger JP]] | ||
[[Category: Mott | [[Category: Mott ML]] | ||
Latest revision as of 09:55, 30 August 2023
Structure of AMPPCP-bound DnaA from Aquifex aeolicus
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