6C7T

Directed evolutionary changes in Kemp Eliminase KE07 - Crystal 20 round 5

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.83 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.201 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

The evolution of multiple active site configurations in a designed enzyme.

Hong, N.S., Petrovic, D., Lee, R., Gryn'ova, G., Purg, M., Saunders, J., Bauer, P., Carr, P.D., Lin, C.Y., Mabbitt, P.D., Zhang, W., Altamore, T., Easton, C., Coote, M.L., Kamerlin, S.C.L., Jackson, C.J.

(2018) Nat Commun 9: 3900-3900

  • DOI: 10.1038/s41467-018-06305-y
  • Primary Citation of Related Structures:  
    6C7H, 6C7M, 6C7T, 6C7V, 6C8B, 6CAI, 6CT3, 6DC1, 6DKV, 6DNJ

  • PubMed Abstract: 

    • Developments in computational chemistry, bioinformatics, and laboratory evolution have facilitated the de novo design and catalytic optimization of enzymes. Besides creating useful catalysts, the generation and iterative improvement of designed enzymes can provide valuable insight into the interplay between the many phenomena that have been suggested to contribute to catalysis ...

    Developments in computational chemistry, bioinformatics, and laboratory evolution have facilitated the de novo design and catalytic optimization of enzymes. Besides creating useful catalysts, the generation and iterative improvement of designed enzymes can provide valuable insight into the interplay between the many phenomena that have been suggested to contribute to catalysis. In this work, we follow changes in conformational sampling, electrostatic preorganization, and quantum tunneling along the evolutionary trajectory of a designed Kemp eliminase. We observe that in the Kemp Eliminase KE07, instability of the designed active site leads to the emergence of two additional active site configurations. Evolutionary conformational selection then gradually stabilizes the most efficient configuration, leading to an improved enzyme. This work exemplifies the link between conformational plasticity and evolvability and demonstrates that residues remote from the active sites of enzymes play crucial roles in controlling and shaping the active site for efficient catalysis.

    Organizational Affiliation: 

    Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia. colin.jackson@anu.edu.au.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Kemp Eliminase KE07A264synthetic constructMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.83 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.201 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 97.765α = 90
b = 97.765β = 90
c = 157.027γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-08-01
    Type: Initial release
  • Version 1.1: 2019-02-13
    Changes: Data collection, Database references