4XL4

Crystal structure of thiolase from Clostridium acetobutylicum in complex with CoA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.183 
  • R-Value Work: 0.142 
  • R-Value Observed: 0.144 

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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:  
    4WYR, 4WYS, 4XL2, 4XL3, 4XL4

  • 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 structure of Clostridium acetobutylicum thiolase (CaTHL) in its reduced/oxidized states ...

    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

    School of Life Sciences, KNU Creative BioResearch Group, Kyungpook National University, Daegu 702-701, Korea.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Acetyl-CoA acetyltransferaseA, B400Clostridium acetobutylicum EA 2018Mutation(s): 1 
Gene Names: CEA_G2880
EC: 2.3.1.9 (PDB Primary Data), 2.1.3.9 (UniProt)
UniProt
Find proteins for A0A0R4I970 (Clostridium acetobutylicum (strain EA 2018))
Explore A0A0R4I970 
Go to UniProtKB:  A0A0R4I970
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0R4I970
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.183 
  • R-Value Work: 0.142 
  • R-Value Observed: 0.144 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 204.307α = 90
b = 54.171β = 90
c = 73.112γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
HKL-2000data scaling
MOLREPphasing

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

Revision History  (Full details and data files)

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