Crystallization and preliminary X-ray diffraction analysis of Bacillus subtilis YwfE, an L-amino-acid ligase

Acta Crystallogr Sect F Struct Biol Cryst Commun. 2012 Feb 1;68(Pt 2):203-6. doi: 10.1107/S174430911105425X. Epub 2012 Jan 26.


Bacillus subtilis YwfE, an L-amino-acid ligase, catalyzes the formation of an α-dipeptide from L-amino acids in an ATP-dependent manner. In order to elucidate the substrate-recognition mode and the reaction mechanism of this ligase, native and selenomethionine-derivatized (SeMet) crystals of YwfE in the presence of ADP, MgCl(2) and the dipeptide L-Ala-L-Gln were obtained using the hanging-drop vapour-diffusion method. These crystals diffracted to 1.9 and 2.8 Å resolution, respectively. Preliminary SAD phase calculations using the data set from the SeMet crystal suggested that the crystal belonged to the hexagonal space group P6(5)22, with unit-cell parameters a = b = 90.85, c = 250.31 Å, and contained one molecule in the asymmetric unit with a solvent content of 57.3%.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bacillus subtilis / enzymology*
  • Crystallization
  • Crystallography, X-Ray
  • Peptide Synthases / chemistry*


  • Peptide Synthases