6C1R

Crystal structure of human C5a receptor in complex with an orthosteric antagonist PMX53 and an allosteric antagonist avacopan


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Orthosteric and allosteric action of the C5a receptor antagonists.

Liu, H.Kim, H.R.Deepak, R.N.V.K.Wang, L.Chung, K.Y.Fan, H.Wei, Z.Zhang, C.

(2018) Nat Struct Mol Biol 25: 472-481

  • DOI: 10.1038/s41594-018-0067-z
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The C5a receptor (C5aR) is a G-protein-coupled receptor (GPCR) that can induce strong inflammatory response to the anaphylatoxin C5a. Targeting C5aR has emerged as a novel anti-inflammatory therapeutic method. However, developing potent C5aR antagoni ...

    The C5a receptor (C5aR) is a G-protein-coupled receptor (GPCR) that can induce strong inflammatory response to the anaphylatoxin C5a. Targeting C5aR has emerged as a novel anti-inflammatory therapeutic method. However, developing potent C5aR antagonists as drugs has proven difficult. Here, we report two crystal structures of human C5aR in ternary complexes with the peptide antagonist PMX53 and a non-peptide antagonist, either avacopan or NDT9513727. The structures, together with other biophysical, computational docking and cell-based signaling data, reveal the orthosteric action of PMX53 and its effect of stabilizing the C5aR structure, as well as the allosteric action of chemically diverse non-peptide C5aR antagonists with different binding poses. Structural comparison analysis suggests the presence of similar allosteric sites in other GPCRs. We also discuss critical structural features of C5aR in activation, including a novel conformation of helix 8. On the basis of our results, we suggest novel strategies for developing C5aR-targeting drugs.


    Organizational Affiliation

    Department of Pharmacology and Chemical Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA. chengzh@pitt.edu.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Soluble cytochrome b562, C5a anaphylatoxin chemotactic receptor 1 chimera
B
422Escherichia coliHomo sapiens
This entity is chimeric
Mutation(s): 3 
Gene Names: cybC
Find proteins for P0ABE7 (Escherichia coli)
Go to UniProtKB:  P0ABE7
Find proteins for P21730 (Homo sapiens)
Go to UniProtKB:  P21730
NIH Common Fund Data Resources
PHAROS  P21730
Protein Feature View
  • Reference Sequence
  • Find similar proteins by: Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PMX53
L
7synthetic constructMutation(s): 0 
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EFD
Query on EFD

Download CCD File 
B
avacopan
C33 H35 F4 N3 O2
PUKBOVABABRILL-YZNIXAGQSA-N
 Ligand Interaction
OLC
Query on OLC

Download CCD File 
B
(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate
C21 H40 O4
RZRNAYUHWVFMIP-GDCKJWNLSA-N
 Ligand Interaction
OLA
Query on OLA

Download CCD File 
B
OLEIC ACID
C18 H34 O2
ZQPPMHVWECSIRJ-KTKRTIGZSA-N
 Ligand Interaction
PGE
Query on PGE

Download CCD File 
B
TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
 Ligand Interaction
MLI
Query on MLI

Download CCD File 
B
MALONATE ION
C3 H2 O4
OFOBLEOULBTSOW-UHFFFAOYSA-L
 Ligand Interaction
NA
Query on NA

Download CCD File 
B
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Biologically Interesting Molecules 1 Unique
IDChainsNameType/Class2D Diagram3D Interactions
PRD_002303
Query on PRD_002303
LPMX53Cyclic peptide / 

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Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
YCM
Query on YCM
BL-PEPTIDE LINKINGC5 H10 N2 O3 SCYS
ORN
Query on ORN
LL-PEPTIDE LINKINGC5 H12 N2 O2ALA
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.194 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.411α = 90
b = 52.608β = 106.08
c = 83.865γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China--

Revision History 

  • Version 1.0: 2018-05-30
    Type: Initial release
  • Version 1.1: 2018-06-20
    Changes: Data collection, Database references
  • Version 1.2: 2018-09-05
    Changes: Data collection, Structure summary
  • Version 1.3: 2020-01-08
    Changes: Author supporting evidence