2GPW

Crystal Structure of the Biotin Carboxylase Subunit, F363A Mutant, of Acetyl-CoA Carboxylase from Escherichia coli.

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.192 

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This is version 1.3 of the entry. See complete history. 


Literature

Is dimerization required for the catalytic activity of bacterial biotin carboxylase?

Shen, Y., Chou, C.Y., Chang, G.G., Tong, L.

(2006) Mol Cell 22: 807-818

  • DOI: 10.1016/j.molcel.2006.04.026
  • Primary Citation of Related Structures:  
    2GPS, 2GPW

  • PubMed Abstract: 

    • Acetyl-coenzyme A carboxylases (ACCs) have crucial roles in fatty acid metabolism. The biotin carboxylase (BC) subunit of Escherichia coli ACC is believed to be active only as a dimer, although the crystal structure shows that the active site of each monomer is 25 A from the dimer interface ...

    Acetyl-coenzyme A carboxylases (ACCs) have crucial roles in fatty acid metabolism. The biotin carboxylase (BC) subunit of Escherichia coli ACC is believed to be active only as a dimer, although the crystal structure shows that the active site of each monomer is 25 A from the dimer interface. We report here biochemical, biophysical, and structural characterizations of BC carrying single-site mutations in the dimer interface. Our studies demonstrate that two of the mutants, R19E and E23R, are monomeric in solution but have only a 3-fold loss in catalytic activity. The crystal structures of the E23R and F363A mutants show that they can still form the correct dimer at high concentrations. Our data suggest that dimerization is not an absolute requirement for the catalytic activity of the E. coli BC subunit, and we propose a new model for the molecular mechanism of action for BC in multisubunit and multidomain ACCs.

    Organizational Affiliation: 

    Department of Biological Sciences, Columbia University, New York, New York 10027. Electronic address: tong@como.bio.columbia.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Biotin carboxylaseA, B, C, D469Escherichia coliMutation(s): 1 
Gene Names: accC
EC: 6.3.4.14 (PDB Primary Data), 6.4.1.2 (UniProt)
UniProt
Find proteins for P24182 (Escherichia coli (strain K12))
Explore P24182 
Go to UniProtKB:  P24182
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP24182
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.192 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.351α = 90
b = 81.499β = 97.69
c = 176.649γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
COMOphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-07-04
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-10-20
    Changes: Database references