1OK1

Decay accelerating factor (cd55) : the structure of an intact human complement regulator.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Complement Regulation at the Molecular Level: The Structure of Decay-Accelerating Factor

Lukacik, P.Roversi, P.White, J.Esser, D.Smith, G.P.Billington, J.Williams, P.A.Rudd, P.M.Wormald, M.R.Harvey, D.J.Crispin, M.D.M.Radcliffe, C.M.Dwek, R.A.Evans, D.J.Morgan, B.P.Smith, R.A.G.Lea, S.M.

(2004) Proc.Natl.Acad.Sci.USA 101: 1279

  • DOI: 10.1073/pnas.0307200101
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The human complement regulator CD55 is a key molecule protecting self-cells from complement-mediated lysis. X-ray diffraction and analytical ultracentrifugation data reveal a rod-like arrangement of four short consensus repeat (SCR) domains in both t ...

    The human complement regulator CD55 is a key molecule protecting self-cells from complement-mediated lysis. X-ray diffraction and analytical ultracentrifugation data reveal a rod-like arrangement of four short consensus repeat (SCR) domains in both the crystal and solution. The stalk linking the four SCR domains to the glycosylphosphatidylinositol anchor is extended by the addition of 11 highly charged O-glycans and positions the domains an estimated 177 A above the membrane. Mutation mapping and hydrophobic potential analysis suggest that the interaction with the convertase, and thus complement regulation, depends on the burial of a hydrophobic patch centered on the linker between SCR domains 2 and 3.


    Related Citations: 
    • Biological Activity, Membrane-Targeting Modification, and Crystallization of Soluble Human Decay Accelerating Factor Expressed in E. Coli
      White, J.,Lukacik, P.,Esser, D.,Steward, M.,Giddings, N.,Bright, J.R.,Fritchley, S.,Morgan, B.P.,Lea, S.M.,Smith, G.P.,Smith, R.A.G.
      (2004) Protein Sci. 13: 2406


    Organizational Affiliation

    Laboratory of Molecular Biophysics and Glycobiology Institute, Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, England.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
COMPLEMENT DECAY-ACCELERATING FACTOR
A, B
254Homo sapiensMutation(s): 0 
Gene Names: CD55 (CR, DAF)
Find proteins for P08174 (Homo sapiens)
Go to Gene View: CD55
Go to UniProtKB:  P08174
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
ACT
Query on ACT

Download SDF File 
Download CCD File 
A, B
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, B
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 47.034α = 86.85
b = 55.133β = 84.92
c = 62.001γ = 65.03
Software Package:
Software NamePurpose
MOLREPphasing
SHARPmodel building
TNTphasing
SCALAdata scaling
BUSTERphasing
SHARPphasing
SOLOMONphasing
SIGMAAphasing
TNTrefinement
DMphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-01-07
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance