1kfs - Revision history

OCA at 07:46, 7 February 2024

OCA — Wed, 07 Feb 2024 07:46:31 GMT

←Older revision		Revision as of 07:46, 7 February 2024
Line 3:		Line 3:
	<StructureSection load='1kfs' size='340' side='right'caption='[[1kfs]], [[Resolution\|resolution]] 2.10Å' scene=''>		<StructureSection load='1kfs' size='340' side='right'caption='[[1kfs]], [[Resolution\|resolution]] 2.10Å' scene=''>
	== Structural highlights ==		== Structural highlights ==
-	<table><tr><td colspan='2'>[[1kfs]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/~~"bacillus_coli"_migula_1895 "bacillus~~ coli~~" migula 1895~~]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KFS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1KFS FirstGlance]. <br>	+	<table><tr><td colspan='2'>[[1kfs]] is a 2 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=1KFS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1KFS FirstGlance]. <br>
-	</td></tr><tr id='~~ligand~~'><td class="sblockLbl"><b>[[~~Ligand~~\|~~Ligands~~:]]</b></td><td class="sblockDat" id="~~ligandDat~~">~~<scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>~~, ~~<scene name='pdbligand=ZN:ZINC+ION'>ZN</scene>~~</td></tr>	+	</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models\|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution\|Resolution]] 2.1Å</td></tr>
-	<tr id='~~activity~~'><td class="sblockLbl"><b>~~Activity~~:</b></td><td class="sblockDat"><~~span class~~='~~plainlinks~~'>~~[https:~~/~~/en.wikipedia.org/wiki/DNA-directed_DNA_polymerase DNA-directed DNA polymerase]~~, ~~with EC number [https~~:~~//www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.7 2.7.7.7]~~ </~~span~~></td></tr>	+	<tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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=1kfs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kfs OCA], [https://pdbe.org/1kfs PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1kfs RCSB], [https://www.ebi.ac.uk/pdbsum/1kfs PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1kfs ProSAT]</span></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=1kfs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kfs OCA], [https://pdbe.org/1kfs PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1kfs RCSB], [https://www.ebi.ac.uk/pdbsum/1kfs PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1kfs ProSAT]</span></td></tr>
	</table>		</table>
	== Function ==		== Function ==
-	[[https://www.uniprot.org/uniprot/DPO1_ECOLI DPO1_ECOLI]] In addition to polymerase activity, this DNA polymerase exhibits 3' to 5' and 5' to 3' exonuclease activity. It is able to utilize nicked circular duplex DNA as a template and can unwind the parental DNA strand from its template.	+	[https://www.uniprot.org/uniprot/DPO1_ECOLI DPO1_ECOLI] In addition to polymerase activity, this DNA polymerase exhibits 3' to 5' and 5' to 3' exonuclease activity. It is able to utilize nicked circular duplex DNA as a template and can unwind the parental DNA strand from its template.
	== Evolutionary Conservation ==		== Evolutionary Conservation ==
	[[Image:Consurf_key_small.gif\|200px\|right]]		[[Image:Consurf_key_small.gif\|200px\|right]]
Line 20:		Line 20:
	</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=1kfs ConSurf].		</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=1kfs ConSurf].
	<div style="clear:both"></div>		<div style="clear:both"></div>
-	<div style="background-color:#fffaf0;">
-	== Publication Abstract from PubMed ==
-	A two-metal-ion catalytic mechanism has previously been proposed for several phosphoryl-transfer enzymes. In order to extend the structural basis of this mechanism, crystal structures of three single-stranded DNA substrates bound to the 3'-5' exonucleolytic active site of the large fragment of DNA polymerase I from Escherichia coli have been elucidated. The first is a 2.1 A resolution structure of a Michaelis complex between the large fragment (or Klenow fragment, KF) and a single-stranded DNA substrate, stabilized by low pH and flash-freezing. The positions and identities of the catalytic metal ions, a Zn2+ at site A and a Mg2+ at site B, have been clearly established. The structural and kinetic consequences of sulfur substitutions in the scissile phosphate have been explored. A complex with the Rp isomer of phosphorothioate DNA, refined at 2.2 A resolution, shows Zn2+ bound to both metal sites and a mispositioning of the substrate and attacking nucleophile. The complex with the Sp phosphorothioate at 2. 3 A resolution reveals that metal ions do not bind in the active site, having been displaced by a bulky sulfur atom. Steady-state kinetic experiments show that catalyzed hydrolysis of the Rp isomer was reduced only about 15-fold, while no enzyme activity could be detected with the Sp phosphorothioate, consistent with the structural observations. Furthermore, Mn2+ could not rescue the activity of the exonuclease on the Sp phosphorothioate. Taken together, these studies confirm and extend the proposed two-metal-ion exonuclease mechanism and provide a structural context to explain the effects of sulfur substitutions on this and other phosphoryl-transfer enzymes. These experiments also suggest that the possibility of metal-ion exclusion be taken into account when interpreting the results of Mn2+ rescue experiments.

-	Structural principles for the inhibition of the 3'-5' exonuclease activity of Escherichia coli DNA polymerase I by phosphorothioates.,Brautigam CA, Steitz TA J Mol Biol. 1998 Mar 27;277(2):363-77. PMID:9514742<ref>PMID:9514742</ref>	+	==See Also==
-		+	*[[DNA polymerase 3D structures\|DNA polymerase 3D structures]]
-	~~From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>~~	+
-	~~</div>~~	+
-	~~<div class~~=~~"pdbe-citations 1kfs" style~~=~~"background-color:#fffaf0;"></div>~~	+
-	~~== References~~ ==	+
-	~~<references/>~~	+
	__TOC__		__TOC__
	</StructureSection>		</StructureSection>
-	[[Category: ~~Bacillus~~ coli ~~migula 1895]]~~	+	[[Category: Escherichia coli]]
-	~~[[Category: DNA-directed DNA polymerase~~]]	+
	[[Category: Large Structures]]		[[Category: Large Structures]]
-	[[Category: Brautigam~~, C A~~]]	+	[[Category: Brautigam CA]]
-	[[Category: Steitz~~, T A]]~~	+	[[Category: Steitz TA]]
-	~~[[Category: Exonuclease]]~~	+
-	~~[[Category: Phosphorothioate]]~~	+
-	~~[[Category: Transferase-dna complex~~]]	+

OCA at 06:53, 11 August 2021

OCA — Wed, 11 Aug 2021 06:53:24 GMT

←Older revision		Revision as of 06:53, 11 August 2021
Line 3:		Line 3:
	<StructureSection load='1kfs' size='340' side='right'caption='[[1kfs]], [[Resolution\|resolution]] 2.10Å' scene=''>		<StructureSection load='1kfs' size='340' side='right'caption='[[1kfs]], [[Resolution\|resolution]] 2.10Å' scene=''>
	== Structural highlights ==		== Structural highlights ==
-	<table><tr><td colspan='2'>[[1kfs]] is a 2 chain structure with sequence from [~~http~~://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KFS OCA]. For a <b>guided tour on the structure components</b> use [~~http~~://~~oca~~.~~weizmann.ac.il/oca-docs~~/fgij/fg.htm?mol=1KFS FirstGlance]. <br>	+	<table><tr><td colspan='2'>[[1kfs]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KFS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1KFS FirstGlance]. <br>
-	</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>	+	</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
-	<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[~~http~~://en.wikipedia.org/wiki/DNA-directed_DNA_polymerase DNA-directed DNA polymerase], with EC number [~~http~~://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.7 2.7.7.7] </span></td></tr>	+	<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/DNA-directed_DNA_polymerase DNA-directed DNA polymerase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.7 2.7.7.7] </span></td></tr>
-	<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[~~http~~://~~oca~~.~~weizmann.ac.il/oca-docs~~/fgij/fg.htm?mol=1kfs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kfs OCA], [~~http~~://pdbe.org/1kfs PDBe], [~~http~~://www.rcsb.org/pdb/explore.do?structureId=1kfs RCSB], [~~http~~://www.ebi.ac.uk/pdbsum/1kfs PDBsum], [~~http~~://prosat.h-its.org/prosat/prosatexe?pdbcode=1kfs ProSAT]</span></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=1kfs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kfs OCA], [https://pdbe.org/1kfs PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1kfs RCSB], [https://www.ebi.ac.uk/pdbsum/1kfs PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1kfs ProSAT]</span></td></tr>
	</table>		</table>
	== Function ==		== Function ==
-	[[~~http~~://www.uniprot.org/uniprot/DPO1_ECOLI DPO1_ECOLI]] In addition to polymerase activity, this DNA polymerase exhibits 3' to 5' and 5' to 3' exonuclease activity. It is able to utilize nicked circular duplex DNA as a template and can unwind the parental DNA strand from its template.	+	[[https://www.uniprot.org/uniprot/DPO1_ECOLI DPO1_ECOLI]] In addition to polymerase activity, this DNA polymerase exhibits 3' to 5' and 5' to 3' exonuclease activity. It is able to utilize nicked circular duplex DNA as a template and can unwind the parental DNA strand from its template.
	== Evolutionary Conservation ==		== Evolutionary Conservation ==
	[[Image:Consurf_key_small.gif\|200px\|right]]		[[Image:Consurf_key_small.gif\|200px\|right]]

OCA at 09:24, 6 November 2019

OCA — Wed, 06 Nov 2019 09:24:16 GMT

←Older revision		Revision as of 09:24, 6 November 2019
Line 1:		Line 1:

	==DNA POLYMERASE I KLENOW FRAGMENT (E.C.2.7.7.7) MUTANT/DNA COMPLEX==		==DNA POLYMERASE I KLENOW FRAGMENT (E.C.2.7.7.7) MUTANT/DNA COMPLEX==
-	<StructureSection load='1kfs' size='340' side='right' caption='[[1kfs]], [[Resolution\|resolution]] 2.10Å' scene=''>	+	<StructureSection load='1kfs' size='340' side='right'caption='[[1kfs]], [[Resolution\|resolution]] 2.10Å' scene=''>
	== Structural highlights ==		== Structural highlights ==
	<table><tr><td colspan='2'>[[1kfs]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KFS OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1KFS FirstGlance]. <br>		<table><tr><td colspan='2'>[[1kfs]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KFS OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1KFS FirstGlance]. <br>
Line 35:		Line 35:
	[[Category: Bacillus coli migula 1895]]		[[Category: Bacillus coli migula 1895]]
	[[Category: DNA-directed DNA polymerase]]		[[Category: DNA-directed DNA polymerase]]
		+	[[Category: Large Structures]]
	[[Category: Brautigam, C A]]		[[Category: Brautigam, C A]]
	[[Category: Steitz, T A]]		[[Category: Steitz, T A]]

OCA at 21:32, 24 January 2018

OCA — Wed, 24 Jan 2018 21:32:23 GMT

←Older revision		Revision as of 21:32, 24 January 2018
Line 1:		Line 1:
		+
	==DNA POLYMERASE I KLENOW FRAGMENT (E.C.2.7.7.7) MUTANT/DNA COMPLEX==		==DNA POLYMERASE I KLENOW FRAGMENT (E.C.2.7.7.7) MUTANT/DNA COMPLEX==
	<StructureSection load='1kfs' size='340' side='right' caption='[[1kfs]], [[Resolution\|resolution]] 2.10Å' scene=''>		<StructureSection load='1kfs' size='340' side='right' caption='[[1kfs]], [[Resolution\|resolution]] 2.10Å' scene=''>
Line 5:		Line 6:
	</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>		</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
	<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/DNA-directed_DNA_polymerase DNA-directed DNA polymerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.7 2.7.7.7] </span></td></tr>		<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/DNA-directed_DNA_polymerase DNA-directed DNA polymerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.7 2.7.7.7] </span></td></tr>
-	<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1kfs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kfs OCA], [http://pdbe.org/1kfs PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1kfs RCSB], [http://www.ebi.ac.uk/pdbsum/1kfs PDBsum]</span></td></tr>	+	<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1kfs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kfs OCA], [http://pdbe.org/1kfs PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1kfs RCSB], [http://www.ebi.ac.uk/pdbsum/1kfs PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1kfs ProSAT]</span></td></tr>
	</table>		</table>
	== Function ==		== Function ==
Line 13:		Line 14:
	Check<jmol>		Check<jmol>
	<jmolCheckbox>		<jmolCheckbox>
-	<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/kf/1kfs_consurf.spt"</scriptWhenChecked>	+	<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/kf/1kfs_consurf.spt"</scriptWhenChecked>
	<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>		<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
	<text>to colour the structure by Evolutionary Conservation</text>		<text>to colour the structure by Evolutionary Conservation</text>
Line 28:		Line 29:
	</div>		</div>
	<div class="pdbe-citations 1kfs" style="background-color:#fffaf0;"></div>		<div class="pdbe-citations 1kfs" style="background-color:#fffaf0;"></div>
-
-	==See Also==
-	*[[DNA polymerase\|DNA polymerase]]
	== References ==		== References ==
	<references/>		<references/>

OCA at 01:14, 9 February 2016

OCA — Tue, 09 Feb 2016 01:14:40 GMT

←Older revision		Revision as of 01:14, 9 February 2016
Line 17:		Line 17:
	<text>to colour the structure by Evolutionary Conservation</text>		<text>to colour the structure by Evolutionary Conservation</text>
	</jmolCheckbox>		</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/~~chain_selection~~.php?pdb_ID=~~2ata~~ ConSurf].	+	</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=1kfs ConSurf].
	<div style="clear:both"></div>		<div style="clear:both"></div>
	<div style="background-color:#fffaf0;">		<div style="background-color:#fffaf0;">

OCA at 17:10, 10 September 2015

OCA — Thu, 10 Sep 2015 17:10:58 GMT

←Older revision		Revision as of 17:10, 10 September 2015
Line 2:		Line 2:
	<StructureSection load='1kfs' size='340' side='right' caption='[[1kfs]], [[Resolution\|resolution]] 2.10Å' scene=''>		<StructureSection load='1kfs' size='340' side='right' caption='[[1kfs]], [[Resolution\|resolution]] 2.10Å' scene=''>
	== Structural highlights ==		== Structural highlights ==
-	<table><tr><td colspan='2'>[[1kfs]] is a 2 chain structure with 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=1KFS OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1KFS FirstGlance]. <br>	+	<table><tr><td colspan='2'>[[1kfs]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KFS OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1KFS FirstGlance]. <br>
	</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>		</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
	<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/DNA-directed_DNA_polymerase DNA-directed DNA polymerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.7 2.7.7.7] </span></td></tr>		<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/DNA-directed_DNA_polymerase DNA-directed DNA polymerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.7 2.7.7.7] </span></td></tr>
-	<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1kfs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kfs OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1kfs RCSB], [http://www.ebi.ac.uk/pdbsum/1kfs PDBsum]</span></td></tr>	+	<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1kfs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kfs OCA], [http://pdbe.org/1kfs PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1kfs RCSB], [http://www.ebi.ac.uk/pdbsum/1kfs PDBsum]</span></td></tr>
	</table>		</table>
	== Function ==		== Function ==
Line 27:		Line 27:
	From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>		From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
	</div>		</div>
		+	<div class="pdbe-citations 1kfs" style="background-color:#fffaf0;"></div>

	==See Also==		==See Also==
Line 34:		Line 35:
	__TOC__		__TOC__
	</StructureSection>		</StructureSection>
		+	[[Category: Bacillus coli migula 1895]]
	[[Category: DNA-directed DNA polymerase]]		[[Category: DNA-directed DNA polymerase]]
-	[[Category: Escherichia coli]]
	[[Category: Brautigam, C A]]		[[Category: Brautigam, C A]]
	[[Category: Steitz, T A]]		[[Category: Steitz, T A]]

OCA at 03:25, 25 December 2014

OCA — Thu, 25 Dec 2014 03:25:54 GMT

←Older revision		Revision as of 03:25, 25 December 2014
Line 3:		Line 3:
	== Structural highlights ==		== Structural highlights ==
	<table><tr><td colspan='2'>[[1kfs]] is a 2 chain structure with 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=1KFS OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1KFS FirstGlance]. <br>		<table><tr><td colspan='2'>[[1kfs]] is a 2 chain structure with 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=1KFS OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1KFS FirstGlance]. <br>
-	</td></tr><tr><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene><br>	+	</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
-	<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/DNA-directed_DNA_polymerase DNA-directed DNA polymerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.7 2.7.7.7] </span></td></tr>	+	<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/DNA-directed_DNA_polymerase DNA-directed DNA polymerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.7 2.7.7.7] </span></td></tr>
-	<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1kfs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kfs OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1kfs RCSB], [http://www.ebi.ac.uk/pdbsum/1kfs PDBsum]</span></td></tr>	+	<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1kfs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kfs OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1kfs RCSB], [http://www.ebi.ac.uk/pdbsum/1kfs PDBsum]</span></td></tr>
-	<table>	+	</table>
		+	== Function ==
		+	[[http://www.uniprot.org/uniprot/DPO1_ECOLI DPO1_ECOLI]] In addition to polymerase activity, this DNA polymerase exhibits 3' to 5' and 5' to 3' exonuclease activity. It is able to utilize nicked circular duplex DNA as a template and can unwind the parental DNA strand from its template.
	== Evolutionary Conservation ==		== Evolutionary Conservation ==
	[[Image:Consurf_key_small.gif\|200px\|right]]		[[Image:Consurf_key_small.gif\|200px\|right]]
Line 34:		Line 36:
	[[Category: DNA-directed DNA polymerase]]		[[Category: DNA-directed DNA polymerase]]
	[[Category: Escherichia coli]]		[[Category: Escherichia coli]]
-	[[Category: Brautigam, C A.]]	+	[[Category: Brautigam, C A]]
-	[[Category: Steitz, T A.]]	+	[[Category: Steitz, T A]]
	[[Category: Exonuclease]]		[[Category: Exonuclease]]
	[[Category: Phosphorothioate]]		[[Category: Phosphorothioate]]
	[[Category: Transferase-dna complex]]		[[Category: Transferase-dna complex]]

OCA at 09:27, 28 September 2014

OCA — Sun, 28 Sep 2014 09:27:41 GMT

←Older revision		Revision as of 09:27, 28 September 2014
Line 1:		Line 1:
-	[[~~Image~~:1kfs.~~png\|left~~\|200px]]	+	==DNA POLYMERASE I KLENOW FRAGMENT (E.C.2.7.7.7) MUTANT/DNA COMPLEX==
		+	<StructureSection load='1kfs' size='340' side='right' caption='[[1kfs]], [[Resolution\|resolution]] 2.10Å' scene=''>
		+	== Structural highlights ==
		+	<table><tr><td colspan='2'>[[1kfs]] is a 2 chain structure with 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=1KFS OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1KFS FirstGlance]. <br>
		+	</td></tr><tr><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene><br>
		+	<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/DNA-directed_DNA_polymerase DNA-directed DNA polymerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.7 2.7.7.7] </span></td></tr>
		+	<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1kfs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kfs OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1kfs RCSB], [http://www.ebi.ac.uk/pdbsum/1kfs PDBsum]</span></td></tr>
		+	<table>
		+	== 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/kf/1kfs_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/chain_selection.php?pdb_ID=2ata ConSurf].
		+	<div style="clear:both"></div>
		+	<div style="background-color:#fffaf0;">
		+	== Publication Abstract from PubMed ==
		+	A two-metal-ion catalytic mechanism has previously been proposed for several phosphoryl-transfer enzymes. In order to extend the structural basis of this mechanism, crystal structures of three single-stranded DNA substrates bound to the 3'-5' exonucleolytic active site of the large fragment of DNA polymerase I from Escherichia coli have been elucidated. The first is a 2.1 A resolution structure of a Michaelis complex between the large fragment (or Klenow fragment, KF) and a single-stranded DNA substrate, stabilized by low pH and flash-freezing. The positions and identities of the catalytic metal ions, a Zn2+ at site A and a Mg2+ at site B, have been clearly established. The structural and kinetic consequences of sulfur substitutions in the scissile phosphate have been explored. A complex with the Rp isomer of phosphorothioate DNA, refined at 2.2 A resolution, shows Zn2+ bound to both metal sites and a mispositioning of the substrate and attacking nucleophile. The complex with the Sp phosphorothioate at 2. 3 A resolution reveals that metal ions do not bind in the active site, having been displaced by a bulky sulfur atom. Steady-state kinetic experiments show that catalyzed hydrolysis of the Rp isomer was reduced only about 15-fold, while no enzyme activity could be detected with the Sp phosphorothioate, consistent with the structural observations. Furthermore, Mn2+ could not rescue the activity of the exonuclease on the Sp phosphorothioate. Taken together, these studies confirm and extend the proposed two-metal-ion exonuclease mechanism and provide a structural context to explain the effects of sulfur substitutions on this and other phosphoryl-transfer enzymes. These experiments also suggest that the possibility of metal-ion exclusion be taken into account when interpreting the results of Mn2+ rescue experiments.

-	~~{{STRUCTURE_1kfs\| PDB=1kfs \| SCENE= }}~~	+	Structural principles for the inhibition of the 3'-5' exonuclease activity of Escherichia coli DNA polymerase I by phosphorothioates.,Brautigam CA, Steitz TA J Mol Biol. 1998 Mar 27;277(2):363-77. PMID:9514742<ref>PMID:9514742</ref>

-	~~===DNA POLYMERASE I KLENOW FRAGMENT (E.C.2.7.7.7) MUTANT~~/~~DNA COMPLEX===~~	+	From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
-		+	</div>
-	~~{{ABSTRACT_PUBMED_9514742}}~~	+
-		+
-	~~==About this Structure==~~	+
-	~~[[1kfs]] is~~ a ~~2 chain structure with 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=1KFS OCA].~~	+

	==See Also==		==See Also==
	*[[DNA polymerase\|DNA polymerase]]		*[[DNA polymerase\|DNA polymerase]]
-		+	== References ==
-	==~~Reference~~==	+	<references/>
-	<~~ref group="xtra">PMID:009514742<~~/~~ref~~><~~references group="xtra"~~/>	+	__TOC__
		+	</StructureSection>
	[[Category: DNA-directed DNA polymerase]]		[[Category: DNA-directed DNA polymerase]]
	[[Category: Escherichia coli]]		[[Category: Escherichia coli]]

OCA at 12:07, 20 October 2012

OCA — Sat, 20 Oct 2012 12:07:52 GMT

←Older revision		Revision as of 12:07, 20 October 2012
Line 8:		Line 8:

	==About this Structure==		==About this Structure==
-	[[1kfs]] is a 2 chain structure ~~of [[DNA polymerase]]~~ with 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=1KFS OCA].	+	[[1kfs]] is a 2 chain structure with 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=1KFS OCA].

	==See Also==		==See Also==

OCA: Protected "1kfs" [edit=sysop:move=sysop]

OCA — Thu, 26 Jul 2012 07:43:36 GMT

Protected "1kfs" [edit=sysop:move=sysop]

←Older revision

Revision as of 07:43, 26 July 2012