7CZ3

Crystal strcuture of Acyl-CoA thioesterase from Bacillus cereus ATCC 14579


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.192 

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Literature

Structural basis for nucleotide-independent regulation of acyl-CoA thioesterase from Bacillus cereus ATCC 14579.

Park, J.Kim, Y.J.Lee, D.Kim, K.J.

(2020) Int J Biol Macromol 170: 390-396

  • DOI: 10.1016/j.ijbiomac.2020.12.174
  • Primary Citation of Related Structures:  
    7CZ3

  • PubMed Abstract: 
  • Acyl-CoA thioesterase is an enzyme that catalyzes the cleavage of thioester bonds and regulates the cellular concentrations of CoASH, fatty acids, and acyl-CoA. In this study, we report the crystal structure of acyl-CoA thioesterase from Bacillus cereus ATCC 14579 (BcACT1) complexed with the CoA product ...

    Acyl-CoA thioesterase is an enzyme that catalyzes the cleavage of thioester bonds and regulates the cellular concentrations of CoASH, fatty acids, and acyl-CoA. In this study, we report the crystal structure of acyl-CoA thioesterase from Bacillus cereus ATCC 14579 (BcACT1) complexed with the CoA product. BcACT1 possesses a monomeric structure of a hotdog-fold and forms a hexamer via the trimerization of three dimers. We identified the active site of BcACT1 and revealed that residues Asn23 and Asp38 are crucial for enzyme catalysis, indicating that BcACT1 belongs to the TE6 family. We also propose that BcACT1 might undergo an open-closed conformational change on the acyl-CoA binding pocket upon binding of the acyl-CoA substrate. Interestingly, the BcACT1 variants with dramatically increased activities were obtained during the site-directed mutagenesis experiments to confirm the residues involved in CoA binding. Finally, we found that BcACT1 is not nucleotide-regulated and suggest that the length and shape of the additional α2-helix are crucial in determining a regulation mode by nucleotides.


    Organizational Affiliation

    School of Life Sciences, KNU Creative BioResearch Group, Kyungpook National University, Daegu 41566, Republic of Korea; KNU Institute for Microorganisms, Kyungpook National University, Daegu 41566, Republic of Korea. Electronic address: kkim@knu.ac.kr.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Acyl-CoA hydrolase
A, B, C, D, E, F
A, B, C, D, E, F
178Bacillus cereus ATCC 14579Mutation(s): 0 
Gene Names: BC_5426
EC: 3.1.2.20
UniProt
Find proteins for Q814K4 (Bacillus cereus (strain ATCC 14579 / DSM 31 / CCUG 7414 / JCM 2152 / NBRC 15305 / NCIMB 9373 / NCTC 2599 / NRRL B-3711))
Explore Q814K4 
Go to UniProtKB:  Q814K4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ814K4
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.192 
  • Space Group: P 31
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.685α = 90
b = 78.685β = 90
c = 215.634γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data scaling
MOLREPphasing
PDB_EXTRACTdata extraction
HKL-2000data reduction

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

  • Deposited Date: 2020-09-07 
  • Released Date: 2021-01-13 
  • Deposition Author(s): Park, J., Kim, K.-J.

Revision History  (Full details and data files)

  • Version 1.0: 2021-01-13
    Type: Initial release