4XL3

Crystal structure of reduced form of thiolase from Clostridium acetobutylicum


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.153 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Redox-switch regulatory mechanism of thiolase from Clostridium acetobutylicum

Kim, S.Jang, Y.S.Ha, S.C.Ahn, J.W.Kim, E.J.Hong Lim, J.Cho, C.Shin Ryu, Y.Kuk Lee, S.Lee, S.Y.Kim, K.J.

(2015) Nat Commun 6: 8410-8410

  • DOI: 10.1038/ncomms9410
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Thiolase is the first enzyme catalysing the condensation of two acetyl-coenzyme A (CoA) molecules to form acetoacetyl-CoA in a dedicated pathway towards the biosynthesis of n-butanol, an important solvent and biofuel. Here we elucidate the crystal st ...

    Thiolase is the first enzyme catalysing the condensation of two acetyl-coenzyme A (CoA) molecules to form acetoacetyl-CoA in a dedicated pathway towards the biosynthesis of n-butanol, an important solvent and biofuel. Here we elucidate the crystal structure of Clostridium acetobutylicum thiolase (CaTHL) in its reduced/oxidized states. CaTHL, unlike those from other aerobic bacteria such as Escherichia coli and Zoogloea ramegera, is regulated by the redox-switch modulation through reversible disulfide bond formation between two catalytic cysteine residues, Cys88 and Cys378. When CaTHL is overexpressed in wild-type C. acetobutylicum, butanol production is reduced due to the disturbance of acidogenic to solventogenic shift. The CaTHL(V77Q/N153Y/A286K) mutant, which is not able to form disulfide bonds, exhibits higher activity than wild-type CaTHL, and enhances butanol production upon overexpression. On the basis of these results, we suggest that CaTHL functions as a key enzyme in the regulation of the main metabolism of C. acetobutylicum through a redox-switch regulatory mechanism.


    Organizational Affiliation

    Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, Kyungbuk 790-784, Korea.,Department of Chemical and Biomolecular Engineering (BK21 Plus Program) and BioProcess Engineering Research Center, KAIST, Daejeon 305-701, Korea.,School of Life Sciences, KNU Creative BioResearch Group, Kyungpook National University, Daegu 702-701, Korea.,Center for Systems and Synthetic Biotechnology, Institute for the BioCentury, and Bioinformatics Research Center, KAIST, Daejeon 305-701, Korea.,School of Nano-Bioscience and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Acetyl-CoA acetyltransferase
A, B
400Clostridium acetobutylicum (strain EA 2018)Mutation(s): 1 
EC: 2.1.3.9, 2.3.1.9
Find proteins for A0A0R4I970 (Clostridium acetobutylicum (strain EA 2018))
Go to UniProtKB:  A0A0R4I970
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, B
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.153 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 204.416α = 90.00
b = 54.290β = 90.00
c = 73.277γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
HKL-2000data scaling
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-10-07
    Type: Initial release
  • Version 1.1: 2015-10-14
    Type: Derived calculations