Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 24600.01 
• Atom Count: 1725 
• Residue Count: 228 
• Unique protein chains: 1

1DST

MUTANT OF FACTOR D WITH ENHANCED CATALYTIC ACTIVITY

• DOI: 10.2210/pdb1DST/pdb

• Classification: HYDROLASE (SERINE PROTEASE)
• Organism(s): Homo sapiens
• Expression System: Cricetulus griseus
• Mutation(s): 3 


• Deposited: 1995-09-13 Released: 1996-07-11 
• Deposition Author(s): Narayana, S.V.L., Volanakis, J.E.

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Experimental Data Snapshot

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

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: 7592653 


• 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 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.

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Related Citations: 

• 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
• 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
• Mutational Analysis of the Substrate Binding Site of Human Complement Factor D
  Kim, S.,Narayana, S.V.,Volanakis, J.E.
  (1994) Biochemistry 33: 14393
• 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




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Organizational Affiliation: 

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

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
FACTOR D	A	228	Homo sapiens	Mutation(s): 3  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: 0.213 
• Space Group: P 3₁ 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 45.380	α = 90.00
b = 45.380	β = 90.00
c = 175.210	γ = 120.00

Software Package:

Software Name	Purpose
PROLSQ	refinement
XENGEN	data collection
XENGEN	data scaling
XENGEN	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1995-09-13 
• Released Date: 1996-07-11 
• Deposition Author(s): Narayana, S.V.L., Volanakis, J.E.

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