1DSU

HUMAN FACTOR D, COMPLEMENT ACTIVATING ENZYME


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.188 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of human factor D. A complement system protein at 2.0 A resolution.

Narayana, S.V.Carson, M.el-Kabbani, O.Kilpatrick, J.M.Moore, D.Chen, X.Bugg, C.E.Volanakis, J.E.DeLucas, L.J.

(1994) J.Mol.Biol. 235: 695-708


  • PubMed Abstract: 
  • Factor D, an essential enzyme for the activation of the alternative pathway of the complement system, belongs to the serine protease superfamily. The crystal structure of the enzyme was solved by a combination of multiple isomorphous replacement and ...

    Factor D, an essential enzyme for the activation of the alternative pathway of the complement system, belongs to the serine protease superfamily. The crystal structure of the enzyme was solved by a combination of multiple isomorphous replacement and molecular replacement methods. The present model was refined to an R-factor of 18.8% using 23,681 observed reflections between 7.5 and 2.0 A resolution, with a root-mean-square deviation from standard bond lengths of 0.016 A. The two non-crystallographically related molecules in the triclinic unit cell have distinctive active site conformations. The protein has the general structural fold of a serine protease, but there are several unique amino acid substitutions resulting in significant alterations in the critical loops responsible for catalysis and substrate specificity in serine proteases. Factor D is the first complement serine protease whose three-dimensional structure has been determined.


    Related Citations: 
    • Crystallization and Preliminary X-Ray Investigation of Factor D of Human Complement
      Narayana, S.V.,Kilpatrick, J.M.,El-Kabbani, O.,Babu, Y.S.,Bugg, C.E.,Volanakis, J.E.,Delucas, L.J.
      (1991) J.Mol.Biol. 219: 1


    Organizational Affiliation

    Center for Macromolecular Crystallography, University of Alabama at Birmingham 35294.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FACTOR D
A, B
228Homo sapiensMutation(s): 0 
Gene Names: CFD (DF, PFD)
EC: 3.4.21.46
Find proteins for P00746 (Homo sapiens)
Go to Gene View: CFD
Go to UniProtKB:  P00746
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.188 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 40.990α = 101.26
b = 65.020β = 109.89
c = 40.360γ = 74.32
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
XENGENdata reduction
XENGENdata collection
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-08-17
    Type: Initial release
  • Version 1.1: 2008-03-25
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance