Yeast Cytosine Deaminase Triple Mutant

Experimental Data Snapshot

  • Resolution: 1.70 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.162 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


Computational thermostabilization of an enzyme.

Korkegian, A.Black, M.E.Baker, D.Stoddard, B.L.

(2005) Science 308: 857-860

  • DOI: https://doi.org/10.1126/science.1107387
  • Primary Citation of Related Structures:  
    1YSB, 1YSD

  • PubMed Abstract: 

    Thermostabilizing an enzyme while maintaining its activity for industrial or biomedical applications can be difficult with traditional selection methods. We describe a rapid computational approach that identified three mutations within a model enzyme that produced a 10 degrees C increase in apparent melting temperature T(m) and a 30-fold increase in half-life at 50 degrees C, with no reduction in catalytic efficiency. The effects of the mutations were synergistic, giving an increase in excess of the sum of their individual effects. The redesigned enzyme induced an increased, temperature-dependent bacterial growth rate under conditions that required its activity, thereby coupling molecular and metabolic engineering.

  • Organizational Affiliation

    Division of Basic Sciences, Fred Hutchinson Cancer Research Center (FHCRC), 1100 Fairview Avenue North, Seattle, WA 98109, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cytosine deaminase
A, B
161Saccharomyces cerevisiaeMutation(s): 3 
Gene Names: FCY1
Find proteins for Q12178 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q12178 
Go to UniProtKB:  Q12178
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ12178
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.70 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.162 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 39.52α = 90
b = 54.63β = 105.3
c = 68.12γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-05-17
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-10-20
    Changes: Database references, Derived calculations
  • Version 1.4: 2024-02-14
    Changes: Data collection