4A6G

N-acyl amino acid racemase from Amycalotopsis sp. Ts-1-60: G291D- F323Y mutant in complex with N-acetyl methionine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.71 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.155 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

An Improved Racemase/Acylase Biotransformation for the Preparation of Enantiomerically Pure Amino Acids.

Baxter, S.Royer, S.Grogan, G.Brown, F.Holt-Tiffin, K.E.Taylor, I.N.Fotheringham, I.G.Campopiano, D.J.

(2012) J.Am.Chem.Soc. 134: 19310

  • DOI: 10.1021/ja305438y

  • PubMed Abstract: 
  • Using directed evolution, a variant N-acetyl amino acid racemase (NAAAR G291D/F323Y) has been developed with up to 6-fold higher activity than the wild-type on a range of N-acetylated amino acids. The variant has been coupled with an enantiospecific ...

    Using directed evolution, a variant N-acetyl amino acid racemase (NAAAR G291D/F323Y) has been developed with up to 6-fold higher activity than the wild-type on a range of N-acetylated amino acids. The variant has been coupled with an enantiospecific acylase to give a preparative scale dynamic kinetic resolution which allows 98% conversion of N-acetyl-DL-allylglycine into D-allylglycine in 18 h at high substrate concentrations (50 g L(-1)). This is the first example of NAAAR operating under conditions which would allow it to be successfully used on an industrial scale for the production of enantiomerically pure α-amino acids. X-ray crystal analysis of the improved NAAAR variant allowed a comparison with the wild-type enzyme. We postulate that a network of novel interactions that result from the introduction of the two side chains is the source of improved catalytic performance.


    Organizational Affiliation

    The EastChem School of Chemistry, Joseph Black Building, The University of Edinburgh, Edinburgh, EH9 3JJ, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
N-ACYLAMINO ACID RACEMASE
A, B, C, D
368Amycolatopsis spMutation(s): 2 
Gene Names: Aaar (menC)
EC: 4.2.1.113
Find proteins for Q44244 (Amycolatopsis sp)
Go to UniProtKB:  Q44244
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AME
Query on AME

Download SDF File 
Download CCD File 
A, B, C, D
N-ACETYLMETHIONINE
C7 H13 N O3 S
XUYPXLNMDZIRQH-LURJTMIESA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B, C, D
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.71 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.155 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 216.710α = 90.00
b = 216.710β = 90.00
c = 261.100γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
xia2data scaling
xia2data reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-11-14
    Type: Initial release
  • Version 1.1: 2012-11-21
    Type: Database references
  • Version 1.2: 2012-12-19
    Type: Database references