7POA

An Irreversible, Promiscuous and Highly Thermostable Claisen-Condensation Biocatalyst Drives the Synthesis of Substituted Pyrroles

• PDB DOI: https://doi.org/10.2210/pdb7POA/pdb

• Classification: SYNTHASE
• Organism(s): Thermus thermophilus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2021-09-08 Released: 2022-09-21 
• Deposition Author(s): Basle, A., Ashley, B., Campopiano, D., Marles-Wright, J.
• Funding Organization(s): Biotechnology and Biological Sciences Research Council (BBSRC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.239 
• R-Value Work: 0.169 

Literature

Versatile Chemo-Biocatalytic Cascade Driven by a Thermophilic and Irreversible C-C Bond-Forming alpha-Oxoamine Synthase.

Ashley, B., Basle, A., Sajjad, M., El Ashram, A., Kelis, P., Marles-Wright, J., Campopiano, D.J.

(2023) ACS Sustain Chem Eng 11: 7997-8002

• PubMed: 37266354 
• DOI: https://doi.org/10.1021/acssuschemeng.3c00243
• Primary Citation of Related Structures:  
  7POA, 7POB, 7POC


• PubMed Abstract: 
  

  We report a chemo-biocatalytic cascade for the synthesis of substituted pyrroles, driven by the action of an irreversible, thermostable, pyridoxal 5'-phosphate (PLP)-dependent, C-C bond-forming biocatalyst ( Th AOS). The Th AOS catalyzes the Claisen-like condensation between various amino acids and acyl-CoA substrates to generate a range of α-aminoketones. These products are reacted with β-keto esters in an irreversible Knorr pyrrole reaction. The determination of the 1.6 Å resolution crystal structure of the PLP-bound form of Th AOS lays the foundation for future engineering and directed evolution. This report establishes the AOS family as useful and versatile C-C bond-forming biocatalysts.

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Organizational Affiliation: 

School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, United Kingdom.

Biological Assembly 1  

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

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 94 kDa 
• Atom Count: 6,678 
• Modelled Residue Count: 792 
• Deposited Residue Count: 842 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
8-amino-7-oxononanoate synthase/2-amino-3-ketobutyrate coenzyme A ligase	A, B	421	Thermus thermophilus	Mutation(s): 0  Gene Names: TTHA1582 EC: 2.3.1.29 (PDB Primary Data), 2.3.1.47 (PDB Primary Data)
UniProt
Find proteins for Q5SHZ8 (Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8)) Explore Q5SHZ8  Go to UniProtKB:  Q5SHZ8

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PLP (Subject of Investigation/LOI)	C [auth A], E [auth B]	PYRIDOXAL-5'-PHOSPHATE C8 H10 N O6 P NGVDGCNFYWLIFO-UHFFFAOYSA-N
MPD	D [auth A], F [auth B]	(4S)-2-METHYL-2,4-PENTANEDIOL C6 H14 O2 SVTBMSDMJJWYQN-YFKPBYRVSA-N
SO4	G [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.239 
• R-Value Work: 0.169 
• Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 57.41	α = 64.74
b = 63.89	β = 70.5
c = 65.91	γ = 68.12

Software Package:

Software Name	Purpose
REFMAC	refinement
PHASER	phasing
Aimless	data scaling
pointless	data scaling
Coot	model building
BUCCANEER	model building
MolProbity	model building
xia2	data scaling
XDS	data reduction

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2022-09-21 
Deposition Author(s): Basle, A., Ashley, B., Campopiano, D., Marles-Wright, J.

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Funding Organization	Location	Grant Number
Biotechnology and Biological Sciences Research Council (BBSRC)	United Kingdom	BB/J01446X/1

Revision History  

• Version 1.0: 2022-09-21
  Type: Initial release
  
• Version 1.1: 2024-01-31
  Changes: Data collection, Refinement description
• Version 1.2: 2024-02-28
  Changes: Database references