1WN5

Crystal Structure of Blasticidin S Deaminase (BSD) Complexed with Cacodylic Acid


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.197 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structures of blasticidin S deaminase (BSD): implications for dynamic properties of catalytic zinc

Kumasaka, T.Yamamoto, M.Furuichi, M.Nakasako, M.Teh, A.H.Kimura, M.Yamaguchi, I.Ueki, T.

(2007) J Biol Chem 282: 37103-37111

  • DOI: 10.1074/jbc.M704476200
  • Primary Citation of Related Structures:  
    2Z3G, 2Z3H, 2Z3I, 2Z3J, 1WN6, 1WN5

  • PubMed Abstract: 
  • The set of blasticidin S (BS) and blasticidin S deaminase (BSD) is a widely used selectable marker for gene transfer experiments. BSD is a member of the cytidine deaminase (CDA) family; it is a zinc-dependent enzyme with three cysteines and one water molecule as zinc ligands ...

    The set of blasticidin S (BS) and blasticidin S deaminase (BSD) is a widely used selectable marker for gene transfer experiments. BSD is a member of the cytidine deaminase (CDA) family; it is a zinc-dependent enzyme with three cysteines and one water molecule as zinc ligands. The crystal structures of BSD were determined in six states (i.e. native, substrate-bound, product-bound, cacodylate-bound, substrate-bound E56Q mutant, and R90K mutant). In the structures, the zinc position and coordination structures vary. The substrate-bound structure shows a large positional and geometrical shift of zinc with a double-headed electron density of the substrate that seems to be assigned to the amino and hydroxyl groups of the substrate and product, respectively. In this intermediate-like structure, the steric hindrance of the hydroxyl group pushes the zinc into the triangular plane consisting of three cysteines with a positional shift of approximately 0.6 A, and the fifth ligand water approaches the opposite direction of the substrate with a shift of 0.4 A. Accordingly, the zinc coordination is changed from tetrahedral to trigonal bipyramidal, and its coordination distance is extended between zinc and its intermediate. The shift of zinc and the recruited water is also observed in the structure of the inactivated E56Q mutant. This novel observation is different in two-cysteine cytidine deaminase Escherichia coli CDA and might be essential for the reaction mechanism in BSD, since it is useful for the easy release of the product by charge compensation and for the structural change of the substrate.


    Related Citations: 
    • Crystallization and preliminary X-ray diffraction studies of blasticidin S deaminase from Aspergillus terreus
      Nakasako, M., Kimura, M., Yamaguchi, I.
      (1999) Acta Crystallogr D Biol Crystallogr 55: 547

    Organizational Affiliation

    Department of Life Science, Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8501, Japan. kumasaka@spring8.or.jp



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Blasticidin-S deaminaseA, B, C, D130Aspergillus terreusMutation(s): 0 
Gene Names: bsd
EC: 3.5.4.23
UniProt
Find proteins for P0C2P0 (Aspergillus terreus)
Explore P0C2P0 
Go to UniProtKB:  P0C2P0
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.197 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.672α = 90
b = 69.293β = 90
c = 144.714γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
MLPHAREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-10-25
    Type: Initial release
  • Version 1.1: 2008-04-22
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance