6ESU

Artificial imine reductase mutant S112A-N118P-K121A-S122M


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.78 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Directed Evolution of an Artificial Imine Reductase.

Hestericova, M.Heinisch, T.Alonso-Cotchico, L.Marechal, J.D.Vidossich, P.Ward, T.R.

(2018) Angew. Chem. Int. Ed. Engl. 57: 1863-1868

  • DOI: 10.1002/anie.201711016
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Artificial metalloenzymes, resulting from incorporation of a metal cofactor within a host protein, have received increasing attention in the last decade. The directed evolution is presented of an artificial transfer hydrogenase (ATHase) based on the ...

    Artificial metalloenzymes, resulting from incorporation of a metal cofactor within a host protein, have received increasing attention in the last decade. The directed evolution is presented of an artificial transfer hydrogenase (ATHase) based on the biotin-streptavidin technology using a straightforward procedure allowing screening in cell-free extracts. Two streptavidin isoforms were yielded with improved catalytic activity and selectivity for the reduction of cyclic imines. The evolved ATHases were stable under biphasic catalytic conditions. The X-ray structure analysis reveals that introducing bulky residues within the active site results in flexibility changes of the cofactor, thus increasing exposure of the metal to the protein surface and leading to a reversal of enantioselectivity. This hypothesis was confirmed by a multiscale approach based mostly on molecular dynamics and protein-ligand dockings.


    Organizational Affiliation

    Departament de Química, Universitat Autònoma de Barcelona, Edifici C.n., 08193, Cerdonyola del Vallès, Barcelona, Spain.,Department Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, Basel, 4002, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Streptavidin
A
159Streptomyces avidiniiMutation(s): 4 
Find proteins for P22629 (Streptomyces avidinii)
Go to UniProtKB:  P22629
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
6IR
Query on 6IR

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Download CCD File 
A
5-[(3~{a}~{S},4~{S},6~{a}~{R})-2-oxidanylidene-1,3,3~{a},4,6,6~{a}-hexahydrothieno[3,4-d]imidazol-4-yl]-~{N}-[4-(2-azanylethylsulfamoyl)phenyl]pentanamide
C18 H27 N5 O4 S2
ZDLCBMIPYXADBN-ZOBUZTSGSA-N
 Ligand Interaction
SO4
Query on SO4

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Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
ACT
Query on ACT

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Download CCD File 
A
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
IR
Query on IR

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Download CCD File 
A
IRIDIUM ION
Ir
MOHYGSBMXIJZBJ-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
6IRKi: 249300000 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.78 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.194 
  • Space Group: I 41 2 2
Unit Cell:
Length (Å)Angle (°)
a = 57.801α = 90.00
b = 57.801β = 90.00
c = 178.273γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling
REFMACrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-01-03
    Type: Initial release
  • Version 1.1: 2018-01-24
    Type: Database references
  • Version 1.2: 2018-02-14
    Type: Database references