1aod

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{{STRUCTURE_1aod| PDB=1aod | SCENE= }}
{{STRUCTURE_1aod| PDB=1aod | SCENE= }}
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'''PHOSPHATIDYLINOSITOL-SPECIFIC PHOSPHOLIPASE C FROM LISTERIA MONOCYTOGENES'''
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===PHOSPHATIDYLINOSITOL-SPECIFIC PHOSPHOLIPASE C FROM LISTERIA MONOCYTOGENES===
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==Overview==
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The X-ray crystal structure of the phosphatidylinositol-specific phospholipase C (PI-PLC) from the human pathogen Listeria monocytogenes has been determined both in free form at 2.0 A resolution, and in complex with the competitive inhibitor myo-inositol at 2.6 A resolution. The structure was solved by a combination of molecular replacement using the structure of Bacillus cereus PI-PLC and single isomorphous replacement. The enzyme consists of a single (beta alpha)8-barrel domain with the active site located at the C-terminal side of the beta-barrel. Unlike other (beta alpha)8-barrels, the barrel in PI-PLC is open because it lacks hydrogen bonding interactions between beta-strands V and VI. myo-Inositol binds to the active site pocket by making specific hydrogen bonding interactions with a number of charged amino acid side-chains as well as a coplanar stacking interaction with a tyrosine residue. Despite a relatively low sequence identity of approximately 24%, the structure is highly homologous to that of B.cereus PI-PLC with an r.m.s. deviation for 228 common C alpha positions of 1.46 A. Larger differences are found for loop regions that accommodate most of the numerous amino acid insertions and deletions. The active site pocket is also well conserved with only two amino acid replacements directly implicated in inositol binding.
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{{ABSTRACT_PUBMED_9367761}}
==About this Structure==
==About this Structure==
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[[Category: Phospholipid degradation]]
[[Category: Phospholipid degradation]]
[[Category: Virulence factor of human pathogen]]
[[Category: Virulence factor of human pathogen]]
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Revision as of 14:17, 30 June 2008

Image:1aod.png

Template:STRUCTURE 1aod

PHOSPHATIDYLINOSITOL-SPECIFIC PHOSPHOLIPASE C FROM LISTERIA MONOCYTOGENES

Template:ABSTRACT PUBMED 9367761

About this Structure

1AOD is a Single protein structure of sequence from Listeria monocytogenes. Full crystallographic information is available from OCA.

Reference

Crystal structure of the phosphatidylinositol-specific phospholipase C from the human pathogen Listeria monocytogenes., Moser J, Gerstel B, Meyer JE, Chakraborty T, Wehland J, Heinz DW, J Mol Biol. 1997 Oct 17;273(1):269-82. PMID:9367761

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