4P3B

Crystal structure of the mouse C5a-desArg anaphylatoxin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.182 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural and functional characterization of human and murine C5a anaphylatoxins.

Schatz-Jakobsen, J.A.Yatime, L.Larsen, C.Petersen, S.V.Klos, A.Andersen, G.R.

(2014) Acta Crystallogr D Biol Crystallogr 70: 1704-1717

  • DOI: https://doi.org/10.1107/S139900471400844X
  • Primary Citation of Related Structures:  
    4P39, 4P3A, 4P3B

  • PubMed Abstract: 

    Complement is an ancient part of the innate immune system that plays a pivotal role in protection against invading pathogens and helps to clear apoptotic and necrotic cells. Upon complement activation, a cascade of proteolytic events generates the complement effectors, including the anaphylatoxins C3a and C5a. Signalling through their cognate G-protein coupled receptors, C3aR and C5aR, leads to a wide range of biological events promoting inflammation at the site of complement activation. The function of anaphylatoxins is regulated by circulating carboxypeptidases that remove their C-terminal arginine residue, yielding C3a-desArg and C5a-desArg. Whereas human C3a and C3a-desArg adopt a canonical four-helix bundle fold, the conformation of human C5a-desArg has recently been described as a three-helix bundle. Here, the crystal structures of an antagonist version of human C5a, A8(Δ71-73), and of murine C5a and C5a-desArg are reported. Whereas A8(Δ71-73) adopts a three-helix bundle conformation similar to human C5a-desArg, the two murine proteins form a four-helix bundle. A cell-based functional assay reveals that murine C5a-desArg, in contrast to its human counterpart, exerts the same level of activition as murine C5a on its cognate receptor. The role of the different C5a conformations is discussed in relation to the differential activation of C5a receptors across species.


  • Organizational Affiliation

    Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10C, DK-8000 Aarhus, Denmark.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Complement C5
A, B, C, D
78Mus musculusMutation(s): 0 
Gene Names: C5Hc
UniProt & NIH Common Fund Data Resources
Find proteins for P06684 (Mus musculus)
Explore P06684 
Go to UniProtKB:  P06684
IMPC:  MGI:96031
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP06684
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
FMT
Query on FMT

Download Ideal Coordinates CCD File 
E [auth A]
F [auth A]
G [auth A]
H [auth B]
I [auth B]
E [auth A],
F [auth A],
G [auth A],
H [auth B],
I [auth B],
J [auth B],
K [auth C],
L [auth C],
M [auth C],
N [auth C],
O [auth C],
P [auth C],
Q [auth C],
R [auth D],
S [auth D]
FORMIC ACID
C H2 O2
BDAGIHXWWSANSR-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.182 
  • Space Group: P 43
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.21α = 90
b = 55.21β = 90
c = 117.43γ = 90
Software Package:
Software NamePurpose
XDSdata scaling
XSCALEdata scaling
PDB_EXTRACTdata extraction
PHASERphasing
PHENIXrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-06-11
    Type: Initial release
  • Version 1.1: 2014-06-25
    Changes: Database references
  • Version 1.2: 2017-09-27
    Changes: Database references, Derived calculations, Other, Refinement description, Source and taxonomy
  • Version 1.3: 2023-09-27
    Changes: Data collection, Database references, Refinement description