Macromolecule Content

• Total Structure Weight: 8318.77 
• Atom Count: 573 
• Residue Count: 74 
• Unique protein chains: 1

1KJS

NMR SOLUTION STRUCTURE OF C5A AT PH 5.2, 303K, 20 STRUCTURES

• DOI: 10.2210/pdb1KJS/pdb

• Classification: CELL ADHESION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli


• Deposited: 1997-01-09 Released: 1997-05-15 
• Deposition Author(s): Zhang, X., Boyar, W., Toth, M., Wennogle, L., Gonnella, N.C.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 500 
• Conformers Submitted: 20 
• Selection Criteria: VIOLATIONS: NOE<0.5A, DIHE<5.0, BONDS<0.05A, ANGLES<5.0 IMPROPERS<5.0 

Literature

Structural definition of the C5a C terminus by two-dimensional nuclear magnetic resonance spectroscopy.

Zhang, X., Boyar, W., Toth, M.J., Wennogle, L., Gonnella, N.C.

(1997) Proteins 28: 261-267

• PubMed: 9188742 


• PubMed Abstract: 
  

The serum glycoprotein C5a, which is derived from the proteolytic cleavage of complement protein C5, has been implicated in the pathogenesis of a number of inflammatory and allergic conditions. Because C5a induces an inflammatory response upon binding to a specific receptor, structural and mutagenesis studies were carried out to gain a better understanding of this binding interaction. These studies led to the first structural definition of the C terminus of recombinant human (rh)-C5a, determined by two-dimensional nuclear magnetic resonance (NMR) spectroscopy. Our results show that the C terminus adopts an alpha-helical conformation spanning residues 69 to 74, while the core domain exists as an antiparallel alpha-helical bundle. This C-terminal helix is connected to the core by a short loop that orients Arg 74 adjacent to Arg 62. Point mutation analysis had already revealed that residues 62 and 74 significantly contribute to agonist activity and receptor binding. Correlation of the C5a tertiary structure with mutational analyses clarifies the significance of the functional and binding properties of Arg 62 and suggests that both Arg 62 and Arg 74 interact at the same binding site on the receptor.

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Organizational Affiliation: 

Novartis Pharmaceuticals Corp., Summit, New Jersey 07901, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
C5A	A	74	Homo sapiens	Mutation(s): 0  Gene Names: C5 (CPAMD4)
Find proteins for P01031 (Homo sapiens) Go to Gene View: C5 Go to UniProtKB:  P01031

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 500 
• Conformers Submitted: 20 
• Selection Criteria: VIOLATIONS: NOE<0.5A, DIHE<5.0, BONDS<0.05A, ANGLES<5.0 IMPROPERS<5.0 
• Olderado: 1KJS Olderado

Software Package:

Software Name	Purpose
X-PLOR	phasing
X-PLOR	refinement
X-PLOR	model building

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-01-09 
• Released Date: 1997-05-15 
• Deposition Author(s): Zhang, X., Boyar, W., Toth, M., Wennogle, L., Gonnella, N.C.

Revision History 

• Version 1.0: 1997-05-15
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance