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1cfa

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[[Image:1cfa.gif|left|200px]]
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{{STRUCTURE_1cfa| PDB=1cfa | SCENE= }}
{{STRUCTURE_1cfa| PDB=1cfa | SCENE= }}
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'''SOLUTION STRUCTURE OF A SEMI-SYNTHETIC C5A RECEPTOR ANTAGONIST AT PH 5.2, 303K, NMR, 20 STRUCTURES'''
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===SOLUTION STRUCTURE OF A SEMI-SYNTHETIC C5A RECEPTOR ANTAGONIST AT PH 5.2, 303K, NMR, 20 STRUCTURES===
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==Overview==
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The tertiary structure of a unique C5a receptor antagonist was determined by two-dimensional NMR spectroscopy. The core domain of this 8-kDa antagonist exists as an antiparallel helical bundle, similar to recombinant human (rh)-C5a. However, unlike C5a, the antagonist's C terminus was found to be conformationally restricted along a groove between helices one and four in the core domain. This conformational restriction situates C-terminal D-Arg 75 in a wedge between core residues Arg 46 and His 15. Correlation of the antagonist's tertiary structure with point mutation analysis revealed the formation of a positively charged contiguous contact surface comprised of D-Arg 75, Arg 46, Lys 49, and His 15. The significance of this surface in generating antagonist properties implies a single binding site with the C5a receptor and provides a structural template for drug design.
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The line below this paragraph, {{ABSTRACT_PUBMED_9007977}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 9007977 is the PubMed ID number.
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{{ABSTRACT_PUBMED_9007977}}
==About this Structure==
==About this Structure==
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1CFA is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CFA OCA].
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1CFA is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CFA OCA].
==Reference==
==Reference==
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[[Category: Glycoprotein]]
[[Category: Glycoprotein]]
[[Category: Gp antagonist]]
[[Category: Gp antagonist]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 12:40:17 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 20:40:10 2008''

Revision as of 17:40, 30 June 2008

Image:1cfa.png

Template:STRUCTURE 1cfa

SOLUTION STRUCTURE OF A SEMI-SYNTHETIC C5A RECEPTOR ANTAGONIST AT PH 5.2, 303K, NMR, 20 STRUCTURES

Template:ABSTRACT PUBMED 9007977

About this Structure

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

Reference

Solution structure of a unique C5a semi-synthetic antagonist: implications in receptor binding., Zhang X, Boyar W, Galakatos N, Gonnella NC, Protein Sci. 1997 Jan;6(1):65-72. PMID:9007977

Page seeded by OCA on Mon Jun 30 20:40:10 2008

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