The purification, crystallization and preliminary X-ray diffraction analysis of dihydrodipicolinate synthase from Clostridium botulinum

Acta Crystallogr Sect F Struct Biol Cryst Commun. 2008 Mar 1;64(Pt 3):206-8. doi: 10.1107/S1744309108002819. Epub 2008 Feb 29.


In recent years, dihydrodipicolinate synthase (DHDPS; EC has received considerable attention from both mechanistic and structural viewpoints. This enzyme, which is part of the diaminopimelate pathway leading to lysine, couples (S)-aspartate-beta-semialdehyde with pyruvate via a Schiff base to a conserved active-site lysine. In this paper, the expression, purification, crystallization and preliminary X-ray diffraction analysis of DHDPS from Clostridium botulinum, an important bacterial pathogen, are presented. The enzyme was crystallized in a number of forms, predominantly using PEG precipitants, with the best crystal diffracting to beyond 1.9 A resolution and displaying P4(2)2(1)2 symmetry. The unit-cell parameters were a = b = 92.9, c = 60.4 A. The crystal volume per protein weight (V(M)) was 2.07 A(3) Da(-1), with an estimated solvent content of 41%. The structure of the enzyme will help guide the design of novel therapeutics against the C. botulinum pathogen.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Clostridium botulinum / enzymology*
  • Clostridium botulinum / genetics
  • Crystallization
  • Hydro-Lyases / chemistry*
  • Hydro-Lyases / genetics
  • Hydro-Lyases / isolation & purification*
  • Hydro-Lyases / metabolism
  • X-Ray Diffraction


  • Hydro-Lyases
  • 4-hydroxy-tetrahydrodipicolinate synthase