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==STRUCTURE OF THE D55N MUTANT OF PHOSPHOLIPASE C FROM BACILLUS CEREUS IN COMPLEX WITH 1,2-DI-N-PENTANOYL-SN-GLYCERO-3-DITHIOPHOSPHOCHOLINE== | ==STRUCTURE OF THE D55N MUTANT OF PHOSPHOLIPASE C FROM BACILLUS CEREUS IN COMPLEX WITH 1,2-DI-N-PENTANOYL-SN-GLYCERO-3-DITHIOPHOSPHOCHOLINE== | ||
<StructureSection load='1p6e' size='340' side='right' caption='[[1p6e]], [[Resolution|resolution]] 2.30Å' scene=''> | <StructureSection load='1p6e' size='340' side='right'caption='[[1p6e]], [[Resolution|resolution]] 2.30Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1p6e]] is a 1 chain structure with sequence from [ | <table><tr><td colspan='2'>[[1p6e]] 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=1P6E OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1P6E FirstGlance]. <br> | ||
</td></tr><tr id=' | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.3Å</td></tr> | ||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=PC5:1,2-DI-N-PENTANOYL-SN-GLYCERO-3-DITHIOPHOSPHOCHOLINE'>PC5</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | |||
<tr id=' | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1p6e FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1p6e OCA], [https://pdbe.org/1p6e PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1p6e RCSB], [https://www.ebi.ac.uk/pdbsum/1p6e PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1p6e ProSAT]</span></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | |||
</table> | </table> | ||
== Function == | == Function == | ||
[ | [https://www.uniprot.org/uniprot/PHLC_BACCE PHLC_BACCE] Required, with sphingomyelinase, to effect target cell lysis (hemolysis). | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/p6/1p6e_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/p6/1p6e_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> | ||
</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/ | </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=1p6e ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
| Line 30: | Line 29: | ||
</div> | </div> | ||
<div class="pdbe-citations 1p6e" style="background-color:#fffaf0;"></div> | <div class="pdbe-citations 1p6e" style="background-color:#fffaf0;"></div> | ||
==See Also== | |||
*[[Phospholipase C|Phospholipase C]] | |||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: | [[Category: Bacillus cereus]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: Antikainen | [[Category: Antikainen NM]] | ||
[[Category: Franklin | [[Category: Franklin CL]] | ||
[[Category: Martin | [[Category: Martin SF]] | ||
[[Category: Monzingo | [[Category: Monzingo AF]] | ||
[[Category: Robertus | [[Category: Robertus JD]] | ||
Latest revision as of 12:38, 16 August 2023
STRUCTURE OF THE D55N MUTANT OF PHOSPHOLIPASE C FROM BACILLUS CEREUS IN COMPLEX WITH 1,2-DI-N-PENTANOYL-SN-GLYCERO-3-DITHIOPHOSPHOCHOLINESTRUCTURE OF THE D55N MUTANT OF PHOSPHOLIPASE C FROM BACILLUS CEREUS IN COMPLEX WITH 1,2-DI-N-PENTANOYL-SN-GLYCERO-3-DITHIOPHOSPHOCHOLINE
Structural highlights
FunctionPHLC_BACCE Required, with sphingomyelinase, to effect target cell lysis (hemolysis). Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedBecause mutations of the ionizable Asp at position 55 of the phosphatidylcholine preferring phospholipase C from Bacillus cereus (PLC(Bc)) to a non-ionizable Asn generate a mutant enzyme (D55N) with 10(4)-fold lower catalytic activity than the wild-type enzyme, we tentatively identified Asp55 as the general base for the enzymatic reaction. To eliminate the alternate possibility that Asp55 is a structurally important amino acid, the X-ray structures of unbound D55N and complexes of D55N with two non-hydrolyzable substrate analogues have been solved and refined to 2.0, 2.0, and 2.3A, respectively. The structures of unbound wild-type PLC(Bc) and a wild-type PLC(Bc)-complex with a non-hydrolyzable substrate analogue do not change significantly as a result of replacing Asp55 with Asn. These observations demonstrate that Asp55 is not critical for the structural integrity of the enzyme and support the hypothesis that Asp55 is the general base in the PLC(Bc)-catalyzed hydrolysis of phospholipids. Using X-ray crystallography of the Asp55Asn mutant of the phosphatidylcholine-preferring phospholipase C from Bacillus cereus to support the mechanistic role of Asp55 as the general base.,Antikainen NM, Monzingo AF, Franklin CL, Robertus JD, Martin SF Arch Biochem Biophys. 2003 Sep 1;417(1):81-6. PMID:12921783[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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