2G7I

Structure of Human Complement Factor H Carboxyl Terminal Domains 19-20: a Basis for Atypical Hemolytic Uremic Syndrome


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of complement factor H carboxyl-terminus reveals molecular basis of atypical haemolytic uremic syndrome.

Jokiranta, T.S.Jaakola, V.-P.Lehtinen, M.J.Parepalo, M.Meri, S.Goldman, A.

(2006) Embo J. 25: 1784-1794

  • DOI: 10.1038/sj.emboj.7601052
  • Also Cited By: 2XQW

  • PubMed Abstract: 
  • Factor H (FH) is the key regulator of the alternative pathway of complement. The carboxyl-terminal domains 19-20 of FH interact with the major opsonin C3b, glycosaminoglycans, and endothelial cells. Mutations within this area are associated with atyp ...

    Factor H (FH) is the key regulator of the alternative pathway of complement. The carboxyl-terminal domains 19-20 of FH interact with the major opsonin C3b, glycosaminoglycans, and endothelial cells. Mutations within this area are associated with atypical haemolytic uremic syndrome (aHUS), a disease characterized by damage to endothelial cells, erythrocytes, and kidney glomeruli. The structure of recombinant FH19-20, solved at 1.8 A by X-ray crystallography, reveals that the short consensus repeat domain 20 contains, unusually, a short alpha-helix, and a patch of basic residues at its base. Most aHUS-associated mutations either destabilize the structure or cluster in a unique region on the surface of FH20. This region is close to, but distinct from, the primary heparin-binding patch of basic residues. By mutating five residues in this region, we show that it is involved, not in heparin, but in C3b binding. Therefore, the majority of the aHUS-associated mutations on the surface of FH19-20 interfere with the interaction between FH and C3b. This obviously leads to impaired control of complement attack on plasma-exposed cell surfaces in aHUS.


    Organizational Affiliation

    Department of Bacteriology and Immunology, Haartman Institute, University of Helsinki, Helsinki, Finland. sakari.jokiranta@helsinki.fi




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Complement factor H
A
125Homo sapiensGene Names: CFH (HF, HF1, HF2)
Find proteins for P08603 (Homo sapiens)
Go to Gene View: CFH
Go to UniProtKB:  P08603
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.206 
  • Space Group: I 41 2 2
Unit Cell:
Length (Å)Angle (°)
a = 91.410α = 90.00
b = 91.410β = 90.00
c = 110.880γ = 90.00
Software Package:
Software NamePurpose
SHELXSphasing
REFMACrefinement
XDSdata reduction
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-05-23
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance