8VLM

Crystal structure of the yeast cytosine deaminase (yCD) E64V-M100W heterodimer


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.67 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Compensatory mutations potentiate constructive neutral evolution by gene duplication.

Despres, P.C.Dube, A.K.Picard, M.E.Grenier, J.Shi, R.Landry, C.R.

(2024) Science 385: 770-775

  • DOI: https://doi.org/10.1126/science.ado5719
  • Primary Citation of Related Structures:  
    8VLJ, 8VLK, 8VLL, 8VLM

  • PubMed Abstract: 

    The functions of proteins generally depend on their assembly into complexes. During evolution, some complexes have transitioned from homomers encoded by a single gene to heteromers encoded by duplicate genes. This transition could occur without adaptive evolution through intermolecular compensatory mutations. Here, we experimentally duplicated and evolved a homodimeric enzyme to determine whether and how this could happen. We identified hundreds of deleterious mutations that inactivate individual homodimers but produce functional enzymes when coexpressed as duplicated proteins that heterodimerize. The structure of one such heteromer reveals how both losses of function are buffered through the introduction of asymmetry in the complex that allows them to subfunctionalize. Constructive neutral evolution can thus occur by gene duplication followed by only one deleterious mutation per duplicate.


  • Organizational Affiliation

    Département de Biochimie, de Microbiologie et de Bio-informatique, Faculté des Sciences et de Génie Université Laval, Québec, QC G1V 0A6, Canada.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cytosine deaminase
A, C
180Saccharomyces cerevisiaeMutation(s): 1 
Gene Names: FCY1YPR062WYP9499.17
EC: 3.5.4.1
UniProt
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
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Cytosine deaminase
B, D
178Saccharomyces cerevisiaeMutation(s): 1 
Gene Names: FCY1YPR062WYP9499.17
EC: 3.5.4.1
UniProt
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
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.67 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.809α = 90
b = 112.09β = 90
c = 116.57γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
Aimlessdata scaling
iMOSFLMdata reduction
MOLREPphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Natural Sciences and Engineering Research Council (NSERC, Canada)CanadaRGPIN-2020-06954
Fonds de Recherche du Quebec - Nature et Technologies (FRQNT)Canada298169

Revision History  (Full details and data files)

  • Version 1.0: 2024-08-21
    Type: Initial release
  • Version 1.1: 2024-08-28
    Changes: Database references
  • Version 1.2: 2024-09-04
    Changes: Database references