1DST

MUTANT OF FACTOR D WITH ENHANCED CATALYTIC ACTIVITY


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of a complement factor D mutant expressing enhanced catalytic activity.

Kim, S.Narayana, S.V.Volanakis, J.E.

(1995) J.Biol.Chem. 270: 24399-24405


  • PubMed Abstract: 
  • Complement factor D is a serine protease regulated by a novel mechanism that depends on conformational changes rather than cleavage of a zymogen for expression of proteolytic activity. The conformational changes are presumed to be induced by the sing ...

    Complement factor D is a serine protease regulated by a novel mechanism that depends on conformational changes rather than cleavage of a zymogen for expression of proteolytic activity. The conformational changes are presumed to be induced by the single natural substrate, C3bB, and to result in reversible reorientation of the catalytic center and of the substrate binding site of factor D, both of which have atypical conformations. Here we report that replacement of Ser94, Thr214, and Ser215 of factor D (chymotrypsinogen numbering has been used for comparison purposes) with the corresponding residues of trypsin, Tyr, Ser, and Trp, is sufficient to induce substantially higher catalytic activity associated with a typical serine protease alignment of the catalytic triad residues His57, Asp102, and Ser195. These results provide a partial structural explanation for the low reactivity of "resting-state" factor D toward synthetic substrates.


    Related Citations: 
    • Mutational Analysis of the Substrate Binding Site of Human Complement Factor D
      Kim, S.,Narayana, S.V.,Volanakis, J.E.
      (1994) Biochemistry 33: 14393
    • 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
    • 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
    • Catalytic Role of a Surface Loop of the Complement Serine Protease Factor D
      Kim, S.,Narayana, S.V.,Volanakis, J.E.
      (1995) J.Immunol. 154: 6073


    Organizational Affiliation

    Department of Medicine, University of Alabama at Birmingham 35294-0006, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FACTOR D
A
228Homo sapiensGene 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: 0.213 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 45.380α = 90.00
b = 45.380β = 90.00
c = 175.210γ = 120.00
Software Package:
Software NamePurpose
PROLSQrefinement
XENGENdata collection
XENGENdata scaling
XENGENdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-07-11
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance