1rlw

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[[Image:1rlw.gif|left|200px]]
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{{Seed}}
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[[Image:1rlw.png|left|200px]]
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{{STRUCTURE_1rlw| PDB=1rlw | SCENE= }}
{{STRUCTURE_1rlw| PDB=1rlw | SCENE= }}
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'''CALCIUM-PHOSPHOLIPID BINDING DOMAIN FROM CYTOSOLIC PHOSPHOLIPASE A2'''
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===CALCIUM-PHOSPHOLIPID BINDING DOMAIN FROM CYTOSOLIC PHOSPHOLIPASE A2===
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==Overview==
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Cytosolic phospholipase A2 (cPLA2) is a calcium-sensitive 85-kDa enzyme that hydrolyzes arachidonic acid-containing membrane phospholipids to initiate the biosynthesis of eicosanoids and platelet-activating factor, potent inflammatory mediators. The calcium-dependent activation of the enzyme is mediated by an N-terminal C2 domain, which is responsible for calcium-dependent translocation of the enzyme to membranes and that enables the intact enzyme to hydrolyze membrane-resident substrates. The 2.4-A x-ray crystal structure of this C2 domain was solved by multiple isomorphous replacement and reveals a beta-sandwich with the same topology as the C2 domain from phosphoinositide-specific phospholipase C delta 1. Two clusters of exposed hydrophobic residues surround two adjacent calcium binding sites. This region, along with an adjoining strip of basic residues, appear to constitute the membrane binding motif. The structure provides a striking insight into the relative importance of hydrophobic and electrostatic components of membrane binding for cPLA2. Although hydrophobic interactions predominate for cPLA2, for other C2 domains such as in "conventional" protein kinase C and synaptotagmins, electrostatic forces prevail.
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(as it appears on PubMed at http://www.pubmed.gov), where 9430701 is the PubMed ID number.
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{{ABSTRACT_PUBMED_9430701}}
==About this Structure==
==About this Structure==
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[[Category: Calb domain]]
[[Category: Calb domain]]
[[Category: Hydrolase]]
[[Category: Hydrolase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 07:39:20 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 20:11:17 2008''

Revision as of 17:11, 28 July 2008

Image:1rlw.png

Template:STRUCTURE 1rlw

CALCIUM-PHOSPHOLIPID BINDING DOMAIN FROM CYTOSOLIC PHOSPHOLIPASE A2

Template:ABSTRACT PUBMED 9430701

About this Structure

1RLW is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Crystal structure of a calcium-phospholipid binding domain from cytosolic phospholipase A2., Perisic O, Fong S, Lynch DE, Bycroft M, Williams RL, J Biol Chem. 1998 Jan 16;273(3):1596-604. PMID:9430701

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