Crystal Structure Of Biotin-(Acetyl-CoA-Carboxylase) ligase From Pyrococcus Horikoshii Ot3

Experimental Data Snapshot

  • Resolution: 1.60 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.216 

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Crystal Structures of Biotin Protein Ligase from Pyrococcus horikoshii OT3 and its Complexes: Structural Basis of Biotin Activation

Bagautdinov, B.Kuroishi, C.Sugahara, M.Kunishima, N.

(2005) J Mol Biol 353: 322-333

  • DOI: https://doi.org/10.1016/j.jmb.2005.08.032
  • Primary Citation of Related Structures:  
    1WNL, 1WPY, 1WQ7, 1WQW

  • PubMed Abstract: 

    Biotin protein ligase (EC catalyses the synthesis of an activated form of biotin, biotinyl-5'-AMP, from substrates biotin and ATP followed by biotinylation of the biotin carboxyl carrier protein subunit of acetyl-CoA carboxylase. The three-dimensional structure of biotin protein ligase from Pyrococcus horikoshii OT3 has been determined by X-ray diffraction at 1.6A resolution. The structure reveals a homodimer as the functional unit. Each subunit contains two domains, a larger N-terminal catalytic domain and a smaller C-terminal domain. The structural feature of the active site has been studied by determination of the crystal structures of complexes of the enzyme with biotin, ADP and the reaction intermediate biotinyl-5'-AMP at atomic resolution. This is the first report of the liganded structures of biotin protein ligase with nucleotide and biotinyl-5'-AMP. The structures of the unliganded and the liganded forms are isomorphous except for an ordering of the active site loop upon ligand binding. Catalytic binding sites are suitably arranged to minimize the conformational changes required during the reaction, as the pockets for biotin and nucleotide are located spatially adjacent to each other in a cleft of the catalytic domain and the pocket for biotinyl-5'-AMP binding mimics the combination of those of the substrates. The exact locations of the ligands and the active site residues allow us to propose a general scheme for the first step of the reaction carried out by biotin protein ligase in which the positively charged epsilon-amino group of Lys111 facilitates the nucleophilic attack on the ATP alpha-phosphate group by the biotin carboxyl oxygen atom and stabilizes the negatively charged intermediates.

  • Organizational Affiliation

    Advanced Protein Crystallography Research Group, RIKEN Harima Institute at SPring-8, 1-1-1 Kouto, Mikazuki-cho, Sayo-gun, Hyogo 679-5148, Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
biotin--[acetyl-CoA-carboxylase] ligase
A, B
235Pyrococcus horikoshii OT3Mutation(s): 0 
Gene Names: birA
Find proteins for O57883 (Pyrococcus horikoshii (strain ATCC 700860 / DSM 12428 / JCM 9974 / NBRC 100139 / OT-3))
Explore O57883 
Go to UniProtKB:  O57883
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO57883
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.60 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.216 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 38.601α = 90
b = 78.264β = 101.48
c = 70.147γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
HKL-2000data reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-10-04
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Source and taxonomy, Version format compliance
  • Version 1.3: 2024-03-13
    Changes: Data collection, Database references