Biological Assembly 1  

 3D View: Structure | Electron Density

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors and generated by PQS (software)

Biological Assembly 2  

 3D View: Structure | Electron Density

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Protein Workshop | Ligand Explorer

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 2 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 27172.10 
• Atom Count: 1902 
• Residue Count: 250 
• Unique protein chains: 1

1H03

Human CD55 domains 3 & 4

• DOI: 10.2210/pdb1H03/pdb

• Classification: IMMUNE SYSTEM PROTEIN
• Organism(s): Homo sapiens
• Expression System: Komagataella pastoris


• Deposited: 2002-06-11 Released: 2003-03-20 
• Deposition Author(s): Williams, P., Chaudhry, Y., Goodfellow, I., Billington, J., Spiller, B., Evans, D.J., Lea, S.M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.7 Å
• R-Value Free: 0.234 
• R-Value Work: 0.191 

Literature

Mapping Cd55 Function. The Structure of Two Pathogen-Binding Domains at 1.7 A

Williams, P., Chaudhry, Y., Goodfellow, I., Billington, J., Powell, R., Spiller, O., Evans, D.J., Lea, S.M.

(2003) J.Biol.Chem. 278: 10691

• PubMed: 12499389 
• DOI: 10.1074/jbc.M212561200
• Primary Citation of Related Structures:  
  1UOT, 1H2Q, 1H2P, 1H04


• PubMed Abstract: 
  

Decay-accelerating factor (CD55), a regulator of the alternative and classical pathways of complement activation, is expressed on all serum-exposed cells. It is used by pathogens, including many enteroviruses and uropathogenic Escherichia coli, as a receptor prior to infection. We describe the x-ray structure of a pathogen-binding fragment of human CD55 at 1.7 A resolution containing two of the three domains required for regulation of human complement. We have used mutagenesis to map biological functions onto the molecule; decay-accelerating activity maps to a single face of the molecule, whereas bacterial and viral pathogens recognize a variety of different sites on CD55.

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Related Citations: 

• Determination of the Affinity and Kinetic Constants for the Interaction between the Human Virus Echovirus 11 and its Cellular Receptor, Cd55
  Lea, S.M.,Powell, R.,Mckee, T.,Evans, D.J.,Brown, D.J.,Stuart, D.I.,Van Der Merwe, A.
  (1998) J.Biol.Chem. 273: 30443
• Crystallization and Preliminary X-Ray Diffraction Analysis of a Biologically Active Fragment of Cd55
  Lea, S.M.,Powell, R.,Evans, D.J.
  (1999) Acta Crystallogr.,Sect.D D55: 1198




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Organizational Affiliation: 

Laboratory of Molecular Biophysics, Department of Biochemistry, University of Oxford, United Kingdom.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
COMPLEMENT DECAY-ACCELERATING FACTOR	P, Q	125	Homo sapiens	Gene Names: CD55 (CR, DAF)
Find proteins for P08174 (Homo sapiens) Go to Gene View: CD55 Go to UniProtKB:  P08174

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.7 Å
• R-Value Free: 0.234 
• R-Value Work: 0.191 
• Space Group: P 1

Unit Cell:

Length (Å)	Angle (°)
a = 38.620	α = 110.48
b = 38.770	β = 96.55
c = 45.330	γ = 108.90

Software Package:

Software Name	Purpose
SHARP	phasing
MOSFLM	data reduction
CNS	refinement
SCALA	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-06-11 
• Released Date: 2003-03-20 
• Deposition Author(s): Williams, P., Chaudhry, Y., Goodfellow, I., Billington, J., Spiller, B., Evans, D.J., Lea, S.M.

Revision History 

• Version 1.0: 2003-03-20
  Type: Initial release
• Version 1.1: 2011-05-08
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance