1CFA

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


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution structure of a unique C5a semi-synthetic antagonist: implications in receptor binding.

Zhang, X.Boyar, W.Galakatos, N.Gonnella, N.C.

(1997) Protein Sci. 6: 65-72

  • DOI: 10.1002/pro.5560060107

  • PubMed Abstract: 
  • 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 C ...

    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.


    Organizational Affiliation

    Ciba-Geigy Corporation, Pharmaceuticals Division, Summit, New Jersey 07901, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
COMPLEMENT 5A SEMI-SYNTHETIC ANTAGONIST
A
71Homo sapiensMutation(s): 0 
Gene Names: C5 (CPAMD4)
Find proteins for P01031 (Homo sapiens)
Go to Gene View: C5
Go to UniProtKB:  P01031
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
SYNTHETIC N-TERMINAL TAIL
B
4N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
DAR
Query on DAR
B
D-PEPTIDE LINKINGC6 H15 N4 O2

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Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 
  • Olderado: 1CFA Olderado
Software Package:
Software NamePurpose
X-PLORrefinement
X-PLORmodel building
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-09-17
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance