The crystal structure of Corynebacterium glutamicum dihydrodipicolinate synthase to 2.2 A resolution

Experimental Data Snapshot

  • Resolution: 2.20 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.228 

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Characterization and crystal structure of lysine insensitive Corynebacterium glutamicum dihydrodipicolinate synthase (cDHDPS) protein.

Rice, E.A.Bannon, G.A.Glenn, K.C.Jeong, S.S.Sturman, E.J.Rydel, T.J.

(2008) Arch Biochem Biophys 480: 111-121

  • DOI: https://doi.org/10.1016/j.abb.2008.09.018
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The lysine insensitive Corynebacterium glutamicum dihydrodipicolinate synthase enzyme (cDHDPS) was recently successfully introduced into maize plants to enhance the level of lysine in the grain. To better understand lysine insensitivity of the cDHDPS, we expressed, purified, kinetically characterized the protein, and solved its X-ray crystal structure. The cDHDPS enzyme has a fold and overall structure that is highly similar to other DHDPS proteins. A noteworthy feature of the active site is the evidence that the catalytic lysine residue forms a Schiff base adduct with pyruvate. Analyses of the cDHDPS structure in the vicinity of the putative binding site for S-lysine revealed that the allosteric binding site in the Escherichia coli DHDPS protein does not exist in cDHDPS due to three non-conservative amino acids substitutions, and this is likely why cDHDPS is not feedback inhibited by lysine.

  • Organizational Affiliation

    Monsanto Company, 800 North Lindbergh Boulevard, St. Louis, MO 63167, USA. elena.a.rice@monsanto.com

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Dihydrodipicolinate synthetase
A, B
304Corynebacterium glutamicumMutation(s): 0 
Gene Names: dapA
Find proteins for P19808 (Corynebacterium glutamicum (strain ATCC 13032 / DSM 20300 / BCRC 11384 / JCM 1318 / LMG 3730 / NCIMB 10025))
Explore P19808 
Go to UniProtKB:  P19808
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP19808
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on KPI
A, B
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.228 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 135.3α = 90
b = 54.81β = 129.39
c = 98.61γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-11-18
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-10-25
    Changes: Refinement description
  • Version 2.0: 2018-05-30
    Changes: Atomic model, Data collection, Derived calculations, Non-polymer description, Polymer sequence, Structure summary
  • Version 2.1: 2023-08-30
    Changes: Data collection, Database references, Derived calculations, Refinement description
  • Version 2.2: 2023-11-29
    Changes: Data collection