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1fnk

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[[Image:1fnk.gif|left|200px]]
 
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==CRYSTAL STRUCTURE ANALYSIS OF CHORISMATE MUTASE MUTANT C88K/R90S==
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The line below this paragraph, containing "STRUCTURE_1fnk", creates the "Structure Box" on the page.
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<StructureSection load='1fnk' size='340' side='right'caption='[[1fnk]], [[Resolution|resolution]] 2.00&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'>[[1fnk]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Bacillus_subtilis Bacillus subtilis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FNK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1FNK 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&#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=CSD:3-SULFINOALANINE'>CSD</scene></td></tr>
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{{STRUCTURE_1fnk| PDB=1fnk | 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=1fnk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1fnk OCA], [https://pdbe.org/1fnk PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1fnk RCSB], [https://www.ebi.ac.uk/pdbsum/1fnk PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1fnk ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/AROH_BACSU AROH_BACSU] Catalyzes the Claisen rearrangement of chorismate to prephenate. Probably involved in the aromatic amino acid biosynthesis.<ref>PMID:2105742</ref>
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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/fn/1fnk_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=1fnk ConSurf].
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<div style="clear:both"></div>
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'''CRYSTAL STRUCTURE ANALYSIS OF CHORISMATE MUTASE MUTANT C88K/R90S'''
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==See Also==
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*[[3D structures of chorismate mutase|3D structures of chorismate mutase]]
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== References ==
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==Overview==
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<references/>
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Combinatorial mutagenesis and in vivo selection experiments previously afforded functional variants of the AroH class Bacillus subtilis chorismate mutase lacking the otherwise highly conserved active site residue Arg(90). Here, we present a detailed kinetic and crystallographic study of several such variants. Removing the arginine side chain (R90G and R90A) reduced catalytic efficiency by more than 5 orders of magnitude. Reintroducing a positive charge to the active site through lysine substitutions restored more than a factor of a thousand in k(cat). Remarkably, the lysine could be placed at position 90 or at the more remote position 88 provided a sterically suitable residue was present at the partner site. Crystal structures of the double mutants C88S/R90K and C88K/R90S show that the lysine adopts an extended conformation that would place its epsilon-ammonium group within hydrogen-bonding distance of the ether oxygen of bound chorismate in the transition state. These results provide support for the hypothesis that developing negative charge in the highly polarized transition state is stabilized electrostatically by a strategically placed cation. The implications of this finding for the mechanism of all natural chorismate mutases and for the design of artificial catalysts are discussed.
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__TOC__
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</StructureSection>
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==About this Structure==
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1FNK is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Bacillus_subtilis Bacillus subtilis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FNK OCA].
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==Reference==
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A strategically positioned cation is crucial for efficient catalysis by chorismate mutase., Kast P, Grisostomi C, Chen IA, Li S, Krengel U, Xue Y, Hilvert D, J Biol Chem. 2000 Nov 24;275(47):36832-8. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10960481 10960481]
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[[Category: Bacillus subtilis]]
[[Category: Bacillus subtilis]]
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[[Category: Chorismate mutase]]
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[[Category: Large Structures]]
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[[Category: Single protein]]
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[[Category: Chen IA]]
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[[Category: Chen, I A.]]
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[[Category: Grisostomi C]]
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[[Category: Grisostomi, C.]]
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[[Category: Hilvert D]]
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[[Category: Hilvert, D.]]
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[[Category: Kast P]]
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[[Category: Kast, P.]]
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[[Category: Krengel U]]
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[[Category: Krengel, U.]]
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[[Category: Li S]]
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[[Category: Li, S.]]
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[[Category: Xue Y]]
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[[Category: Xue, Y.]]
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[[Category: Chorismate mutase]]
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[[Category: Crystal structure]]
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[[Category: Mutant]]
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[[Category: Protein]]
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[[Category: Pseudo-alpha beta-barrel]]
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[[Category: Trimer]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 16:32:26 2008''
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Current revision

CRYSTAL STRUCTURE ANALYSIS OF CHORISMATE MUTASE MUTANT C88K/R90S

PDB ID 1fnk

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