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[[Image:2ffz.gif|left|200px]]<br /><applet load="2ffz" size="350" color="white" frame="true" align="right" spinBox="true"
caption="2ffz, resolution 2.050&Aring;" />
'''Structural Studies Examining the Substrate Specificity Profiles of PC-PLCBc Protein Variants'''<br />


==Overview==
==Structural Studies Examining the Substrate Specificity Profiles of PC-PLCBc Protein Variants==
The phosphatidylcholine preferring phospholipase C from Bacillus cereus, (PC-PLC(Bc)) catalyzes the hydrolysis of phospholipids in the following, order of preference: phosphatidylcholine (PC)&gt;phosphatidylethanolamine, (PE)&gt;phosphatidylserine (PS). In previous work, mutagenic, kinetic, and, crystallographic experiments suggested that varying the amino acids at the, 4th, 56th, and 66th positions had a significant influence upon the, substrate specificity profile of PC-PLC(Bc). Here, we report the crystal, structures of the native form of several PC-PLC(Bc) variants that, exhibited altered substrate specificities for PC, PE, and PS at maximum, resolutions of 1.90-2.05A. Comparing the structures of these variants to, the structure of the wild-type enzyme reveals only minor differences with, respect to the number and location of active site water molecules and the, side chain conformations of residues at the 4th and 56th positions. These, results suggest that subtle changes in steric and electronic properties in, the substrate binding site of PC-PLC(Bc) are responsible for the, significant changes in substrate selectivity.
<StructureSection load='2ffz' size='340' side='right'caption='[[2ffz]], [[Resolution|resolution]] 2.05&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2ffz]] 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=2FFZ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2FFZ FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.05&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2ffz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ffz OCA], [https://pdbe.org/2ffz PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ffz RCSB], [https://www.ebi.ac.uk/pdbsum/2ffz PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ffz ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/PHLC_BACCE PHLC_BACCE] Required, with sphingomyelinase, to effect target cell lysis (hemolysis).
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ff/2ffz_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </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/main_output.php?pdb_ID=2ffz ConSurf].
<div style="clear:both"></div>


==About this Structure==
==See Also==
2FFZ is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Bacillus_cereus Bacillus cereus] with <scene name='pdbligand=ZN:'>ZN</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/Phospholipase_C Phospholipase C], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.4.3 3.1.4.3] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2FFZ OCA].
*[[Phospholipase C|Phospholipase C]]
 
__TOC__
==Reference==
</StructureSection>
Structural studies examining the substrate specificity profiles of PC-PLC(Bc) protein variants., Benfield AP, Goodey NM, Phillips LT, Martin SF, Arch Biochem Biophys. 2007 Apr 1;460(1):41-7. Epub 2007 Feb 12. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=17324372 17324372]
[[Category: Bacillus cereus]]
[[Category: Bacillus cereus]]
[[Category: Phospholipase C]]
[[Category: Large Structures]]
[[Category: Single protein]]
[[Category: Antikainen NM]]
[[Category: Antikainen, N.M.]]
[[Category: Benfield AB]]
[[Category: Benfield, A.B.]]
[[Category: Martin SF]]
[[Category: Martin, S.F.]]
[[Category: ZN]]
[[Category: pc-plcbc protein variants]]
[[Category: substrate specificity]]
 
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