6Y33

Streptavidin mutant S112R with a biotC5-1 cofactor - an artificial iron hydroxylase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.49 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.169 

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


Literature

Enantioselective Hydroxylation of Benzylic C(sp3)-H Bonds by an Artificial Iron Hydroxylase Based on the Biotin-Streptavidin Technology.

Serrano-Plana, J.Rumo, C.Rebelein, J.G.Peterson, R.L.Barnet, M.Ward, T.R.

(2020) J Am Chem Soc 142: 10617-10623

  • DOI: https://doi.org/10.1021/jacs.0c02788
  • Primary Citation of Related Structures:  
    6Y25, 6Y2M, 6Y2T, 6Y33, 6Y34, 6Y3Q

  • PubMed Abstract: 

    The selective hydroxylation of C-H bonds is of great interest to the synthetic community. Both homogeneous catalysts and enzymes offer complementary means to tackle this challenge. Herein, we show that biotinylated Fe(TAML)-complexes (TAML = Tetra Amido Macrocyclic Ligand) can be used as cofactors for incorporation into streptavidin to assemble artificial hydroxylases. Chemo-genetic optimization of both cofactor and streptavidin allowed optimizing the performance of the hydroxylase. Using H 2 O 2 as oxidant, up to ∼300 turnovers for the oxidation of benzylic C-H bonds were obtained. Upgrading the ee was achieved by kinetic resolution of the resulting benzylic alcohol to afford up to >98% ee for ( R )-tetralol. X-ray analysis of artificial hydroxylases highlights critical details of the second coordination sphere around the Fe(TAML) cofactor.


  • Organizational Affiliation

    Department of Chemistry, University of Basel, BPR1096, Mattenstrasse 24a, CH-4058 Basel, Switzerland.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
StreptavidinA [auth AAA]159Streptomyces avidiniiMutation(s): 1 
UniProt
Find proteins for P22629 (Streptomyces avidinii)
Explore P22629 
Go to UniProtKB:  P22629
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP22629
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.49 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.169 
  • Space Group: I 41 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.633α = 90
b = 57.633β = 90
c = 183.649γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Swiss National Science FoundationSwitzerland200020_182046
Swiss National Science FoundationSwitzerlandNCCR MSE
European Research Council (ERC)European Union694424
European Molecular Biology Organization (EMBO)GermanyALTF 194-2017
European Research Council (ERC)European UnionH2020-MSCA-IF-2016

Revision History  (Full details and data files)

  • Version 1.0: 2020-07-01
    Type: Initial release
  • Version 1.1: 2024-01-24
    Changes: Data collection, Database references, Derived calculations, Refinement description