4ptd: Difference between revisions

From Proteopedia
Jump to navigation Jump to search
← Older edit
No edit summary
No edit summary
 
(9 intermediate revisions by the same user not shown)
Line 1: Line 1:
[[Image:4ptd.jpg|left|200px]]


{{Structure
==PHOSPHATIDYLINOSITOL-SPECIFIC PHOSPHOLIPASE C MUTANT D274N==
|PDB= 4ptd |SIZE=350|CAPTION= <scene name='initialview01'>4ptd</scene>, resolution 2.3&Aring;
<StructureSection load='4ptd' size='340' side='right'caption='[[4ptd]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
|SITE= <scene name='pdbsite=ACT:Active+Site'>ACT</scene>
== Structural highlights ==
|LIGAND=  
<table><tr><td colspan='2'>[[4ptd]] 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=4PTD OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4PTD FirstGlance]. <br>
|ACTIVITY= [http://en.wikipedia.org/wiki/Transferred_entry:_4.6.1.13 Transferred entry: 4.6.1.13], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.4.10 3.1.4.10]  
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.3&#8491;</td></tr>
|GENE= PI-PLC GENE ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1396 Bacillus cereus])
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4ptd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ptd OCA], [https://pdbe.org/4ptd PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4ptd RCSB], [https://www.ebi.ac.uk/pdbsum/4ptd PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4ptd ProSAT]</span></td></tr>
}}
</table>
== Function ==
[https://www.uniprot.org/uniprot/PLC_BACCE PLC_BACCE] Cleaves glycosylphosphatidylinositol (GPI) and phosphatidylinositol (PI) anchors but not PI phosphates.
== 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/pt/4ptd_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=4ptd ConSurf].
<div style="clear:both"></div>


'''PHOSPHATIDYLINOSITOL-SPECIFIC PHOSPHOLIPASE C MUTANT D274N'''
==See Also==
 
*[[Phospholipase C|Phospholipase C]]
 
__TOC__
==Overview==
</StructureSection>
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.
 
==About this Structure==
4PTD 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=4PTD OCA].
 
==Reference==
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]
[[Category: Bacillus cereus]]
[[Category: Bacillus cereus]]
[[Category: Single protein]]
[[Category: Large Structures]]
[[Category: Transferred entry: 4 6.1 13]]
[[Category: Heinz DW]]
[[Category: Heinz, D W.]]
[[Category: hydrolase]]
[[Category: lipid degradation]]
[[Category: phosphatidylinositol specific phospholipase c]]
[[Category: phosphoric diester]]
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 19:10:43 2008''

Latest revision as of 15:42, 1 March 2024

PHOSPHATIDYLINOSITOL-SPECIFIC PHOSPHOLIPASE C MUTANT D274NPHOSPHATIDYLINOSITOL-SPECIFIC PHOSPHOLIPASE C MUTANT D274N

Structural highlights

4ptd is a 1 chain structure with sequence from Bacillus cereus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.3Å
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

PLC_BACCE Cleaves glycosylphosphatidylinositol (GPI) and phosphatidylinositol (PI) anchors but not PI phosphates.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

See Also

4ptd, resolution 2.30Å

Drag the structure with the mouse to rotate

Proteopedia Page Contributors and Editors (what is this?)Proteopedia Page Contributors and Editors (what is this?)

OCA
Retrieved from "https://proteopedia.openfox.io/wiki/index.php?title=4ptd&oldid=4075947"