5KQW

Directed Evolution of Transaminases By Ancestral Reconstruction. Using Old Proteins for New Chemistries

• PDB DOI: https://doi.org/10.2210/pdb5KQW/pdb

• Classification: TRANSFERASE
• Organism(s): Pseudomonas
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2016-07-06 Released: 2017-07-12 
• Deposition Author(s): Wilding, M., Newman, J., Peat, T.S., Scott, C.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.23 Å
• R-Value Free: 0.192 
• R-Value Work: 0.164 
• R-Value Observed: 0.165 

Literature

Reverse engineering: transaminase biocatalyst development using ancestral sequence reconstruction

Wilding, M., Peat, T.S., Kalyaanamoorthy, S., Newman, J., Scott, C., Jermiin, L.S.

(2017) Green Chemistry 19: 5375

• DOI: https://doi.org/10.1039/c7gc02343j

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 209.21 kDa 
• Atom Count: 14,665 
• Modelled Residue Count: 1,829 
• Deposited Residue Count: 1,916 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
4-aminobutyrate transaminase	A, B, C, D	479	Pseudomonas	Mutation(s): 0  EC: 2.6.1.18

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PEG	F [auth A], G [auth B], I [auth C]	DI(HYDROXYETHYL)ETHER C4 H10 O3 MTHSVFCYNBDYFN-UHFFFAOYSA-N
EDO	H [auth B], J [auth D]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N
MG	E [auth A]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.23 Å
• R-Value Free: 0.192 
• R-Value Work: 0.164 
• R-Value Observed: 0.165 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 66.051	α = 90
b = 125.179	β = 101.97
c = 110.496	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
Aimless	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2017-07-12 
Deposition Author(s): Wilding, M., Newman, J., Peat, T.S., Scott, C.

Revision History  

• Version 1.0: 2017-07-12
  Type: Initial release
  
• Version 1.1: 2019-01-30
  Changes: Data collection, Database references
• Version 1.2: 2023-10-04
  Changes: Data collection, Database references, Derived calculations, Refinement description