1kfk

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{{Seed}}
 
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[[Image:1kfk.png|left|200px]]
 
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==Crystal structure of Tryptophan Synthase From Salmonella Typhimurium==
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The line below this paragraph, containing "STRUCTURE_1kfk", creates the "Structure Box" on the page.
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<StructureSection load='1kfk' size='340' side='right'caption='[[1kfk]], [[Resolution|resolution]] 2.40&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'>[[1kfk]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Salmonella_enterica_subsp._enterica_serovar_Typhimurium Salmonella enterica subsp. enterica serovar Typhimurium] and [https://en.wikipedia.org/wiki/Salmonella_enterica_subsp._enterica_serovar_Typhimurium_str._LT2 Salmonella enterica subsp. enterica serovar Typhimurium str. LT2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KFK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1KFK 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]] 2.4&#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=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=PLP:PYRIDOXAL-5-PHOSPHATE'>PLP</scene></td></tr>
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{{STRUCTURE_1kfk| PDB=1kfk | 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=1kfk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kfk OCA], [https://pdbe.org/1kfk PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1kfk RCSB], [https://www.ebi.ac.uk/pdbsum/1kfk PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1kfk ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/TRPB_SALTY TRPB_SALTY] The beta subunit is responsible for the synthesis of L-tryptophan from indole and L-serine.
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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/kf/1kfk_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=1kfk 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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The catalytic activity and substrate channeling of the pyridoxal 5'-phosphate-dependent tryptophan synthase alpha(2)beta(2) complex is regulated by allosteric interactions that modulate the switching of the enzyme between open, low activity and closed, high activity states during the catalytic cycle. The highly conserved alphaThr183 residue is part of loop alphaL6 and is located next to the alpha-active site and forms part of the alpha-beta subunit interface. The role of the interactions of alphaThr183 in alpha-site catalysis and allosteric regulation was investigated by analyzing the kinetics and crystal structures of the isosteric mutant alphaThr183Val. The mutant displays strongly impaired allosteric alpha-beta communication, and the catalytic activity of the alpha-reaction is reduced one hundred fold, whereas the beta-activity is not affected. The structural work establishes that the basis for the missing inter-subunit signaling is the lack of loop alphaL6 closure even in the presence of the alpha-subunit ligands, 3-indolyl-D-glycerol 3'-phosphate, or 3-indolylpropanol 3'-phosphate. The structural basis for the reduced alpha-activity has its origins in the missing hydrogen bond between alphaThr183 and the catalytic residue, alphaAsp60.
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===Crystal structure of Tryptophan Synthase From Salmonella Typhimurium===
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On the role of alphaThr183 in the allosteric regulation and catalytic mechanism of tryptophan synthase.,Kulik V, Weyand M, Seidel R, Niks D, Arac D, Dunn MF, Schlichting I J Mol Biol. 2002 Dec 6;324(4):677-90. PMID:12460570<ref>PMID:12460570</ref>
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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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<div class="pdbe-citations 1kfk" style="background-color:#fffaf0;"></div>
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==See Also==
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The line below this paragraph, {{ABSTRACT_PUBMED_12460570}}, adds the Publication Abstract to the page
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*[[Tryptophan synthase 3D structures|Tryptophan synthase 3D structures]]
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(as it appears on PubMed at http://www.pubmed.gov), where 12460570 is the PubMed ID number.
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== References ==
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<references/>
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{{ABSTRACT_PUBMED_12460570}}
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__TOC__
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</StructureSection>
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==About this Structure==
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[[Category: Large Structures]]
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1KFK is a 2 chains structure of sequences from [http://en.wikipedia.org/wiki/Salmonella_typhimurium Salmonella typhimurium] and [http://en.wikipedia.org/wiki/Salmonella_typhimurium_lt2 Salmonella typhimurium lt2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KFK OCA].
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[[Category: Salmonella enterica subsp. enterica serovar Typhimurium]]
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[[Category: Salmonella enterica subsp. enterica serovar Typhimurium str. LT2]]
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==Reference==
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[[Category: Arac D]]
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<ref group="xtra">PMID:12460570</ref><references group="xtra"/>
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[[Category: Dunn MF]]
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[[Category: Salmonella typhimurium]]
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[[Category: Kulik V]]
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[[Category: Salmonella typhimurium lt2]]
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[[Category: Niks D]]
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[[Category: Tryptophan synthase]]
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[[Category: Schlichting I]]
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[[Category: Arac, D.]]
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[[Category: Seidel R]]
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[[Category: Dunn, M F.]]
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[[Category: Weyand M]]
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[[Category: Kulik, V.]]
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[[Category: Niks, D.]]
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[[Category: Schlichting, I.]]
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[[Category: Seidel, R.]]
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[[Category: Weyand, M.]]
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[[Category: Carbon-oxygen lyase]]
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[[Category: Pyridoxal phosphate]]
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[[Category: Tryptophan biosynthesis]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Feb 17 11:30:28 2009''
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Current revision

Crystal structure of Tryptophan Synthase From Salmonella Typhimurium

PDB ID 1kfk

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