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New page: left|200px<br /><applet load="1se7" size="450" color="white" frame="true" align="right" spinBox="true" caption="1se7" /> '''Solution structure of the E. coli bacterioph... |
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== | ==Solution structure of the E. coli bacteriophage P1 encoded HOT protein: a homologue of the theta subunit of E. coli DNA polymerase III== | ||
DNA polymerase III, the main replicative polymerase of E. coli, contains a | <StructureSection load='1se7' size='340' side='right'caption='[[1se7]]' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[1se7]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_virus_P1 Escherichia virus P1]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1SE7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1SE7 FirstGlance]. <br> | |||
</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=1se7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1se7 OCA], [https://pdbe.org/1se7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1se7 RCSB], [https://www.ebi.ac.uk/pdbsum/1se7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1se7 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/Q71T70_BPP1 Q71T70_BPP1] | |||
== 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/se/1se7_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=1se7 ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
DNA polymerase III, the main replicative polymerase of E. coli, contains a small subunit, theta, that binds to the epsilon proofreading subunit and appears to enhance the enzyme's proofreading function--especially under extreme conditions. It was recently discovered that E. coli bacteriophage P1 encodes a theta homolog, named HOT. The (1)H-(15)N HSQC spectrum of HOT exhibits more uniform intensities and less evidence of conformational exchange than that of theta; this uniformity facilitates a determination of the HOT solution structure by NMR. The structure contains three alpha helices, as reported previously for theta; however, the folding topology of the two proteins is very different. Residual dipolar coupling measurements on labeled theta support the conclusion that it is structurally homologous with HOT. As judged by CD measurements, the melting temperature of HOT was 62 degrees C, compared to 56 degrees C for theta, consistent with other data suggesting greater thermal stability of the HOT protein. | |||
Phage like it HOT: solution structure of the bacteriophage P1-encoded HOT protein, a homolog of the theta subunit of E. coli DNA polymerase III.,Derose EF, Kirby TW, Mueller GA, Chikova AK, Schaaper RM, London RE Structure. 2004 Dec;12(12):2221-31. PMID:15576035<ref>PMID:15576035</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
[[Category: | <div class="pdbe-citations 1se7" style="background-color:#fffaf0;"></div> | ||
[[Category: | == References == | ||
[[Category: Chikova | <references/> | ||
[[Category: DeRose | __TOC__ | ||
[[Category: Kirby | </StructureSection> | ||
[[Category: London | [[Category: Escherichia virus P1]] | ||
[[Category: Mueller | [[Category: Large Structures]] | ||
[[Category: Schaaper | [[Category: Chikova AK]] | ||
[[Category: DeRose EF]] | |||
[[Category: Kirby TW]] | |||
[[Category: London RE]] | |||
[[Category: Mueller GA]] | |||
[[Category: Schaaper RM]] | |||
Latest revision as of 12:08, 22 May 2024
Solution structure of the E. coli bacteriophage P1 encoded HOT protein: a homologue of the theta subunit of E. coli DNA polymerase IIISolution structure of the E. coli bacteriophage P1 encoded HOT protein: a homologue of the theta subunit of E. coli DNA polymerase III
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 PubMedDNA polymerase III, the main replicative polymerase of E. coli, contains a small subunit, theta, that binds to the epsilon proofreading subunit and appears to enhance the enzyme's proofreading function--especially under extreme conditions. It was recently discovered that E. coli bacteriophage P1 encodes a theta homolog, named HOT. The (1)H-(15)N HSQC spectrum of HOT exhibits more uniform intensities and less evidence of conformational exchange than that of theta; this uniformity facilitates a determination of the HOT solution structure by NMR. The structure contains three alpha helices, as reported previously for theta; however, the folding topology of the two proteins is very different. Residual dipolar coupling measurements on labeled theta support the conclusion that it is structurally homologous with HOT. As judged by CD measurements, the melting temperature of HOT was 62 degrees C, compared to 56 degrees C for theta, consistent with other data suggesting greater thermal stability of the HOT protein. Phage like it HOT: solution structure of the bacteriophage P1-encoded HOT protein, a homolog of the theta subunit of E. coli DNA polymerase III.,Derose EF, Kirby TW, Mueller GA, Chikova AK, Schaaper RM, London RE Structure. 2004 Dec;12(12):2221-31. PMID:15576035[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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