4UU9

Crystal structure of the human c5a in complex with MEDI7814 a neutralising antibody


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.12 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.175 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and characterization of a high affinity C5a monoclonal antibody that blocks binding to C5aR1 and C5aR2 receptors.

Colley, C.S.Popovic, B.Sridharan, S.Debreczeni, J.E.Hargeaves, D.Fung, M.An, L.L.Edwards, B.Arnold, J.England, E.Eghobamien, L.Sivars, U.Flavell, L.Renshaw, J.Wickson, K.Warrener, P.Zha, J.Bonnell, J.Woods, R.Wilkinson, T.Dobson, C.Vaughan, T.J.

(2018) MAbs 10: 104-117

  • DOI: 10.1080/19420862.2017.1384892

  • PubMed Abstract: 
  • C5a is a potent anaphylatoxin that modulates inflammation through the C5aR1 and C5aR2 receptors. The molecular interactions between C5a-C5aR1 receptor are well defined, whereas C5a-C5aR2 receptor interactions are poorly understood. Here, we describe ...

    C5a is a potent anaphylatoxin that modulates inflammation through the C5aR1 and C5aR2 receptors. The molecular interactions between C5a-C5aR1 receptor are well defined, whereas C5a-C5aR2 receptor interactions are poorly understood. Here, we describe the generation of a human antibody, MEDI7814, that neutralizes C5a and C5adesArg binding to the C5aR1 and C5aR2 receptors, without affecting complement-mediated bacterial cell killing. Unlike other anti-C5a mAbs described, this antibody has been shown to inhibit the effects of C5a by blocking C5a binding to both C5aR1 and C5aR2 receptors. The crystal structure of the antibody in complex with human C5a reveals a discontinuous epitope of 22 amino acids. This is the first time the epitope for an antibody that blocks C5aR1 and C5aR2 receptors has been described, and this work provides a basis for molecular studies aimed at further understanding the C5a-C5aR2 receptor interaction. MEDI7814 has therapeutic potential for the treatment of acute inflammatory conditions in which both C5a receptors may mediate inflammation, such as sepsis or renal ischemia-reperfusion injury.


    Organizational Affiliation

    d Respiratory, Inflammation and Autoimmunity, MedImmune Ltd , Cambridge , UK.,a Antibody Discovery and Protein Engineering, MedImmune Ltd , Cambridge , UK.,c Respiratory, Inflammation and Autoimmunity, MedImmune LLC , Gaithersburg , MD , USA.,b Discovery Sciences, AstraZeneca R&D , Cambridge , UK.,e Translational Biology, IMED RIA Biotech Unit , AstraZeneca , Gothenburg , Sweden.,g Antibody Discovery and Protein Engineering, MedImmune LLC , Gaithersburg , MD , USA.,f Infectious Diseases, MedImmune LLC , Gaithersburg , MD , USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MEDI7814
A, H
123N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
MEDI7814
B, L
111N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
COMPLEMENT C5
C, D
75Homo sapiensMutation(s): 0 
Gene Names: C5 (CPAMD4)
Find proteins for P01031 (Homo sapiens)
Go to Gene View: C5
Go to UniProtKB:  P01031
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
C, H, L
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.12 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.175 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 56.854α = 90.00
b = 117.472β = 90.00
c = 126.457γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
SCALAdata scaling
MOSFLMdata reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Revision History 

  • Version 1.0: 2015-08-12
    Type: Initial release
  • Version 1.1: 2017-12-06
    Type: Database references
  • Version 1.2: 2019-02-27
    Type: Data collection, Database references