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2ayl

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{{STRUCTURE_2ayl| PDB=2ayl | SCENE= }}
{{STRUCTURE_2ayl| PDB=2ayl | SCENE= }}
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'''2.0 Angstrom Crystal Structure of Manganese Protoporphyrin IX-reconstituted Ovine Prostaglandin H2 Synthase-1 Complexed With Flurbiprofen'''
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===2.0 Angstrom Crystal Structure of Manganese Protoporphyrin IX-reconstituted Ovine Prostaglandin H2 Synthase-1 Complexed With Flurbiprofen===
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==Overview==
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Prostaglandin H2 synthase (EC 1.14.99.1) is a clinically important drug target that catalyzes two key steps in the biosynthesis of the eicosanoid hormones. The enzyme contains spatially distinct cyclooxygenase and peroxidase active sites, both of which require a heme cofactor. Substitution of ferric heme by Mn(III) protoporphyrin IX greatly diminishes the peroxidase activity, but has little effect on the cyclooxygenase activity. Here, the 2.0 angstroms resolution crystal structure of the Mn(III) form of ovine prostaglandin H2 synthase-1 is described (R = 21.8%, R(free) = 23.7%). Substitution of Mn(III) for Fe(III) causes no structural perturbations in the protein. However, the out-of-plane displacement of the manganese ion with respect to the porphyrin is greater than that of the iron by approximately 0.2 angstroms. This perturbation may help to explain the altered catalytic properties of the manganese enzyme.
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(as it appears on PubMed at http://www.pubmed.gov), where 16421446 is the PubMed ID number.
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{{ABSTRACT_PUBMED_16421446}}
==About this Structure==
==About this Structure==
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[[Category: Peroxidase]]
[[Category: Peroxidase]]
[[Category: Prostaglandin synthase]]
[[Category: Prostaglandin synthase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 19:37:50 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 05:05:26 2008''

Revision as of 02:05, 28 July 2008

Image:2ayl.png

Template:STRUCTURE 2ayl

2.0 Angstrom Crystal Structure of Manganese Protoporphyrin IX-reconstituted Ovine Prostaglandin H2 Synthase-1 Complexed With Flurbiprofen

Template:ABSTRACT PUBMED 16421446

About this Structure

2AYL is a Single protein structure of sequence from Ovis aries. Full crystallographic information is available from OCA.

Reference

2.0 angstroms structure of prostaglandin H2 synthase-1 reconstituted with a manganese porphyrin cofactor., Gupta K, Selinsky BS, Loll PJ, Acta Crystallogr D Biol Crystallogr. 2006 Feb;62(Pt 2):151-6. Epub 2006, Jan 18. PMID:16421446

Page seeded by OCA on Mon Jul 28 05:05:26 2008

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