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2ptd

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[[Image:2ptd.gif|left|200px]]
 
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==PHOSPHATIDYLINOSITOL-SPECIFIC PHOSPHOLIPASE C MUTANT D198E==
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The line below this paragraph, containing "STRUCTURE_2ptd", creates the "Structure Box" on the page.
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<StructureSection load='2ptd' size='340' side='right'caption='[[2ptd]], [[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'>[[2ptd]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Bacillus_cereus Bacillus cereus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2PTD OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2PTD 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='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2ptd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ptd OCA], [https://pdbe.org/2ptd PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ptd RCSB], [https://www.ebi.ac.uk/pdbsum/2ptd PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ptd ProSAT]</span></td></tr>
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{{STRUCTURE_2ptd| PDB=2ptd | SCENE= }}
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/PLC_BACCE PLC_BACCE] Cleaves glycosylphosphatidylinositol (GPI) and phosphatidylinositol (PI) anchors but not PI phosphates.
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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/pt/2ptd_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=2ptd ConSurf].
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<div style="clear:both"></div>
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'''PHOSPHATIDYLINOSITOL-SPECIFIC PHOSPHOLIPASE C MUTANT D198E'''
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==See Also==
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*[[Phospholipase C|Phospholipase C]]
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__TOC__
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==Overview==
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</StructureSection>
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The role of amino acid residues located in the active site pocket of phosphatidylinositol-specific phospholipase C (PI-PLC) from Bacillus cereus[Heinz, D. W., Ryan, M., Bullock, T., &amp; Griffith, O. H. (1995) EMBO J. 14, 3855-3863] was investigated by site-directed mutagenesis, kinetics, and crystal structure analysis. Twelve residues involved in catalysis and substrate binding (His32, Arg69, His82, Gly83, Lys115, Glu117, Arg163, Trp178, Asp180, Asp198, Tyr200, and Asp274) were individually replaced by 1-3 other amino acids, resulting in a total number of 21 mutants. Replacements in the mutants H32A, H32L, R69A, R69E, R69K, H82A, H82L, E117K, R163I, D198A, D198E, D198S, Y200S, and D274S caused essentially complete inactivation of the enzyme. The remaining mutants (G83S, K115E, R163K, W178Y, D180S, Y200F, and D274N) exhibited reduced activities up to 57% when compared with wild-type PI-PLC. Crystal structures determined at a resolution ranging from 2.0 to 2.7 A for six mutants (H32A, H32L, R163K, D198E, D274N, and D274S) showed that significant changes were confined to the site of the respective mutation without perturbation of the rest of the structure. Only in mutant D198E do the side chains of two neighboring arginine residues move across the inositol binding pocket toward the newly introduced glutamic acid. An analysis of these structure-function relationships provides new insight into the catalytic mechanism, and suggests a molecular explanation of some of the substrate stereospecificity and inhibitor binding data available for this enzyme.
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==About this Structure==
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2PTD is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Bacillus_cereus Bacillus cereus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2PTD OCA].
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==Reference==
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Probing the roles of active site residues in phosphatidylinositol-specific phospholipase C from Bacillus cereus by site-directed mutagenesis., Gassler CS, Ryan M, Liu T, Griffith OH, Heinz DW, Biochemistry. 1997 Oct 21;36(42):12802-13. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9335537 9335537]
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[[Category: Bacillus cereus]]
[[Category: Bacillus cereus]]
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[[Category: Phosphatidylinositol diacylglycerol-lyase]]
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[[Category: Large Structures]]
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[[Category: Single protein]]
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[[Category: Heinz DW]]
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[[Category: Heinz, D W.]]
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[[Category: Hydrolase]]
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[[Category: Lipid degradation]]
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[[Category: Phosphatidylinositol specific phospholipase c]]
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[[Category: Phosphoric diester]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 13:46:29 2008''
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Current revision

PHOSPHATIDYLINOSITOL-SPECIFIC PHOSPHOLIPASE C MUTANT D198E

PDB ID 2ptd

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