6FH8

E. coli surface display of streptavidin for directed evolution of an allylic deallocase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.64 Å
  • R-Value Free: 0.159 
  • R-Value Work: 0.120 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

E. colisurface display of streptavidin for directed evolution of an allylic deallylase.

Heinisch, T.Schwizer, F.Garabedian, B.Csibra, E.Jeschek, M.Vallapurackal, J.Pinheiro, V.B.Marliere, P.Panke, S.Ward, T.R.

(2018) Chem Sci 9: 5383-5388

  • DOI: 10.1039/c8sc00484f

  • PubMed Abstract: 
  • Artificial metalloenzymes (ArMs hereafter) combine attractive features of both homogeneous catalysts and enzymes and offer the potential to implement new-to-nature reactions in living organisms. Herein we present an <i>E. coli </i> surface display p ...

    Artificial metalloenzymes (ArMs hereafter) combine attractive features of both homogeneous catalysts and enzymes and offer the potential to implement new-to-nature reactions in living organisms. Herein we present an E. coli surface display platform for streptavidin (Sav hereafter) relying on an Lpp-OmpA anchor. The system was used for the high throughput screening of a bioorthogonal CpRu-based artificial deallylase (ADAse) that uncages an allylcarbamate-protected aminocoumarin 1 . Two rounds of directed evolution afforded the double mutant S112M-K121A that displayed a 36-fold increase in surface activity vs. cellular background and a 5.7-fold increased in vitro activity compared to the wild type enzyme. The crystal structure of the best ADAse reveals the importance of mutation S112M to stabilize the cofactor conformation inside the protein.


    Organizational Affiliation

    Department of Biosystems Science and Engineering , ETH Zurich , Mattenstrasse 26 , Basel CH-4058 , Switzerland.,Department of Chemistry , University of Basel , Mattenstrasse 24a , Basel CH-4002 , Switzerland . Email: thomas.ward@unibas.ch.,Heurisko USA Inc. , Delaware , USA.,Institute of Structural and Molecular Biology , University College London , Gower Street , London , WC1E 6BT , UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Streptavidin
A
159Streptomyces avidiniiMutation(s): 2 
Find proteins for P22629 (Streptomyces avidinii)
Go to UniProtKB:  P22629
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
JCT
Query on JCT

Download SDF File 
Download CCD File 
A
biotinylated ruthenium cyclopentadienide
C29 H28 N5 O5 Ru S
CQAGRAKHOFYKGA-XRCFJZOASA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.64 Å
  • R-Value Free: 0.159 
  • R-Value Work: 0.120 
  • Space Group: I 41 2 2
Unit Cell:
Length (Å)Angle (°)
a = 57.722α = 90.00
b = 57.722β = 90.00
c = 183.615γ = 90.00
Software Package:
Software NamePurpose
REFMACphasing
XDSdata reduction
Aimlessdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-08-22
    Type: Initial release