4HR7

Crystal Structure of Biotin Carboxyl Carrier Protein-Biotin Carboxylase Complex from E.coli


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 

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This is version 1.2 of the entry. See complete history


Literature

The three-dimensional structure of the biotin carboxylase-biotin carboxyl carrier protein complex of E. coli acetyl-CoA carboxylase.

Broussard, T.C.Kobe, M.J.Pakhomova, S.Neau, D.B.Price, A.E.Champion, T.S.Waldrop, G.L.

(2013) Structure 21: 650-657

  • DOI: 10.1016/j.str.2013.02.001
  • Primary Citation of Related Structures:  
    4HR7

  • PubMed Abstract: 
  • Acetyl-coenzyme A (acetyl-CoA) carboxylase is a biotin-dependent, multifunctional enzyme that catalyzes the regulated step in fatty acid synthesis. The Escherichia coli enzyme is composed of a homodimeric biotin carboxylase (BC), biotinylated biotin carboxyl carrier protein (BCCP), and an α2β2 heterotetrameric carboxyltransferase ...

    Acetyl-coenzyme A (acetyl-CoA) carboxylase is a biotin-dependent, multifunctional enzyme that catalyzes the regulated step in fatty acid synthesis. The Escherichia coli enzyme is composed of a homodimeric biotin carboxylase (BC), biotinylated biotin carboxyl carrier protein (BCCP), and an α2β2 heterotetrameric carboxyltransferase. This enzyme complex catalyzes two half-reactions to form malonyl-coenzyme A. BC and BCCP participate in the first half-reaction, whereas carboxyltransferase and BCCP are involved in the second. Three-dimensional structures have been reported for the individual subunits; however, the structural basis for how BCCP reacts with the carboxylase or transferase is unknown. Therefore, we report here the crystal structure of E. coli BCCP complexed with BC to a resolution of 2.49 Å. The protein-protein complex shows a unique quaternary structure and two distinct interfaces for each BCCP monomer. These BCCP binding sites are unique compared to phylogenetically related biotin-dependent carboxylases and therefore provide novel targets for developing antibiotics against bacterial acetyl-CoA carboxylase.


    Organizational Affiliation

    Division of Biochemistry and Molecular Biology, Louisiana State University, Baton Rouge, LA 70803, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Biotin carboxylaseA, C, E, F449Escherichia coli K-12Mutation(s): 0 
Gene Names: accCfabGb3256JW3224
EC: 6.3.4.14 (PDB Primary Data), 6.4.1.2 (PDB Primary Data)
Find proteins for P24182 (Escherichia coli (strain K12))
Explore P24182 
Go to UniProtKB:  P24182
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Biotin carboxyl carrier protein of acetyl-CoA carboxylaseB, D, G, H [auth I]176Escherichia coli K-12Mutation(s): 0 
Gene Names: accBfabEb3255JW3223
Find proteins for P0ABD8 (Escherichia coli (strain K12))
Explore P0ABD8 
Go to UniProtKB:  P0ABD8
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 232.995α = 90
b = 96.385β = 120.15
c = 120.573γ = 90
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
XDSdata reduction
XDSdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-03-13
    Type: Initial release
  • Version 1.1: 2013-04-03
    Changes: Database references
  • Version 1.2: 2013-05-29
    Changes: Database references