3afg

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[[Image:3afg.png|left|200px]]
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==Crystal structure of ProN-Tk-SP from Thermococcus kodakaraensis==
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<StructureSection load='3afg' size='340' side='right' caption='[[3afg]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[3afg]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Thermococcus_kodakarensis Thermococcus kodakarensis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3AFG OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3AFG FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene></td></tr>
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1scj|1scj]]</td></tr>
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<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">TK1689 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=311400 Thermococcus kodakarensis])</td></tr>
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<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Subtilisin Subtilisin], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.21.62 3.4.21.62] </span></td></tr>
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<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=3afg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3afg OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3afg RCSB], [http://www.ebi.ac.uk/pdbsum/3afg PDBsum]</span></td></tr>
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</table>
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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/af/3afg_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/chain_selection.php?pdb_ID=2ata ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Tk-SP is a hyperthermostable subtilisin-like serine protease from Thermococcus kodakaraensis and is autoprocessed from its precursor (Pro-Tk-SP) with N- and C-propeptides. The crystal structure of the active-site mutant of Pro-Tk-SP lacking C-propeptide, ProN-Tk-S359A, was determined at 2.0 A resolution. ProN-Tk-S359A consists of the N-propeptide, subtilisin, and beta-jelly roll domains. Two Ca(2+) ions bind to the beta-jelly roll domain. The overall structure of ProN-Tk-S359A without the beta-jelly roll domain is similar to that of the bacterial propeptide:subtilisin complex, except that it does not contain Ca(2+) ions. To analyze the role of the beta-jelly roll domain of Tk-SP, we constructed a series of the active-site mutants of Tk-SP with (Tk-S359A/C) and without (Tk-S359A/CDeltaJ) beta-jelly roll domain. Both Tk-S359C and Tk-S359CDeltaJ exhibited protease activities in gel assay, indicating that the beta-jelly roll domain is not required for folding or activity. However, the T(m) value of Tk-S359ADeltaJ determined by far-UV CD spectroscopy in the presence of 10-mM CaCl(2) was lower than that of Tk-S359A by 29.4 degrees C. The T(m) value of Tk-S359A was decreased by 29.5 degrees C by the treatment with 10 mM ethylenediaminetetraacetic acid, indicating that the beta-jelly roll domain contributes to the stabilization of Tk-S359A only in a Ca(2+)-bound form. Tk-SP highly resembles subtilisin-like serine proteases from Pyrococcus furiosus, Thermococcus gammatolerans, and Thermococcus onnurineus in size and amino acid sequence. We propose that attachment of a beta-jelly roll domain to the C-terminus is one of the strategies of the proteins from hyperthermophiles to adapt to high-temperature environment.
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{{STRUCTURE_3afg| PDB=3afg | SCENE= }}
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Crystal structure of a subtilisin homologue, Tk-SP, from Thermococcus kodakaraensis: requirement of a C-terminal beta-jelly roll domain for hyperstability.,Foophow T, Tanaka S, Angkawidjaja C, Koga Y, Takano K, Kanaya S J Mol Biol. 2010 Jul 23;400(4):865-77. Epub 2010 Jun 1. PMID:20595040<ref>PMID:20595040</ref>
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===Crystal structure of ProN-Tk-SP from Thermococcus kodakaraensis===
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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{{ABSTRACT_PUBMED_20595040}}
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== References ==
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<references/>
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==About this Structure==
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__TOC__
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[[3afg]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Thermococcus_kodakarensis Thermococcus kodakarensis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3AFG OCA].
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</StructureSection>
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==Reference==
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<ref group="xtra">PMID:020595040</ref><references group="xtra"/>
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[[Category: Subtilisin]]
[[Category: Subtilisin]]
[[Category: Thermococcus kodakarensis]]
[[Category: Thermococcus kodakarensis]]

Revision as of 11:57, 29 October 2014

Crystal structure of ProN-Tk-SP from Thermococcus kodakaraensis

3afg, resolution 2.00Å

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