2hnh

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[[Image:2hnh.gif|left|200px]]
 
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==Crystal structure of the catalytic alpha subunit of E. coli replicative DNA polymerase III==
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The line below this paragraph, containing "STRUCTURE_2hnh", creates the "Structure Box" on the page.
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<StructureSection load='2hnh' size='340' side='right'caption='[[2hnh]], [[Resolution|resolution]] 2.30&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'>[[2hnh]] is a 1 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=2HNH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2HNH FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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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]] 2.3&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene></td></tr>
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{{STRUCTURE_2hnh| PDB=2hnh | SCENE= }}
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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=2hnh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2hnh OCA], [https://pdbe.org/2hnh PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2hnh RCSB], [https://www.ebi.ac.uk/pdbsum/2hnh PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2hnh ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/DPO3A_ECOLI DPO3A_ECOLI] DNA polymerase III is a complex, multichain enzyme responsible for most of the replicative synthesis in bacteria. This DNA polymerase also exhibits 3' to 5' exonuclease activity. The alpha chain is the DNA polymerase.
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/hn/2hnh_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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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=2hnh ConSurf].
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<div style="clear:both"></div>
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'''Crystal structure of the catalytic alpha subunit of E. coli replicative DNA polymerase III'''
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==See Also==
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*[[DNA polymerase 3D structures|DNA polymerase 3D structures]]
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__TOC__
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==Overview==
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</StructureSection>
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Bacterial replicative DNA polymerases such as Polymerase III (Pol III) share no sequence similarity with other polymerases. The crystal structure, determined at 2.3 A resolution, of a large fragment of Pol III (residues 1-917), reveals a unique chain fold with localized similarity in the catalytic domain to DNA polymerase beta and related nucleotidyltransferases. The structure of Pol III is strikingly different from those of members of the canonical DNA polymerase families, which include eukaryotic replicative polymerases, suggesting that the DNA replication machinery in bacteria arose independently. A structural element near the active site in Pol III that is not present in nucleotidyltransferases but which resembles an element at the active sites of some canonical DNA polymerases suggests that, at a more distant level, all DNA polymerases may share a common ancestor. The structure also suggests a model for interaction of Pol III with the sliding clamp and DNA.
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==About this Structure==
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2HNH 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=2HNH OCA].
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==Reference==
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Crystal structure of the catalytic alpha subunit of E. coli replicative DNA polymerase III., Lamers MH, Georgescu RE, Lee SG, O'Donnell M, Kuriyan J, Cell. 2006 Sep 8;126(5):881-92. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16959568 16959568]
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[[Category: DNA-directed DNA polymerase]]
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[[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: Donnell, M O.]]
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[[Category: Georgescu RE]]
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[[Category: Georgescu, R E.]]
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[[Category: Kuriyan J]]
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[[Category: Kuriyan, J.]]
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[[Category: Lee S]]
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[[Category: Lee, S.]]
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[[Category: Meindert MH]]
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[[Category: Meindert, M H.]]
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[[Category: O'Donnell M]]
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[[Category: Dna polymerase iii]]
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[[Category: Dna replication]]
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[[Category: Nucleotidyltransferase]]
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[[Category: Php]]
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[[Category: Pol beta]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 06:29:22 2008''
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Current revision

Crystal structure of the catalytic alpha subunit of E. coli replicative DNA polymerase III

PDB ID 2hnh

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