5YS1

Crystal structure of Multicopper Oxidase CueO G304K mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.49 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.145 
  • R-Value Observed: 0.147 

Starting Model: experimental
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This is version 1.1 of the entry. See complete history


Literature

Crystal structures of multicopper oxidase CueO G304K mutant: structural basis of the increased laccase activity

Wang, H.Liu, X.Zhao, J.Yue, Q.Yan, Y.Gao, Z.Dong, Y.Zhang, Z.Fan, Y.Tian, J.Wu, N.Gong, Y.

(2018) Sci Rep 8: 14252-14252

  • DOI: https://doi.org/10.1038/s41598-018-32446-7
  • Primary Citation of Related Structures:  
    5YS1, 5YS5

  • PubMed Abstract: 

    The multicopper oxidase CueO is involved in copper homeostasis and copper (Cu) tolerance in Escherichia coli. The laccase activity of CueO G304K mutant is higher than wild-type CueO. To explain this increase in activity, we solved the crystal structure of G304K mutant at 1.49 Å. Compared with wild-type CueO, the G304K mutant showed dramatic conformational changes in methionine-rich helix and the relative regulatory loop (R-loop). We further solved the structure of Cu-soaked enzyme, and found that the addition of Cu ions induced further conformational changes in the R-loop and methionine-rich helix as a result of the new Cu-binding sites on the enzyme's surface. We propose a mechanism for the enhanced laccase activity of the G304K mutant, where movements of the R-loop combined with the changes of the methionine-rich region uncover the T1 Cu site allowing greater access of the substrate. Two of the G304K double mutants showed the enhanced or decreased laccase activity, providing further evidence for the interaction between the R-loop and the methionine-rich region. The cuprous oxidase activity of these mutants was about 20% that of wild-type CueO. These structural features of the G304K mutant provide clues for designing specific substrate-binding mutants in the biotechnological applications.


  • Organizational Affiliation

    Multi-discipline Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Blue copper oxidase CueO516Escherichia coli K-12Mutation(s): 1 
Gene Names: cueO
EC: 1.16.3.4
UniProt
Find proteins for P36649 (Escherichia coli (strain K12))
Explore P36649 
Go to UniProtKB:  P36649
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP36649
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.49 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.145 
  • R-Value Observed: 0.147 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.254α = 90
b = 50.65β = 98.75
c = 66.231γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-10-17
    Type: Initial release
  • Version 1.1: 2023-11-22
    Changes: Data collection, Database references, Refinement description