Expression, purification, crystallization and preliminary characterization of uridine 5 '-diphospho-N-acetylmuramoyl L-alanyl-D-glutamate : lysine ligase (MurE) from Streptococcus pneumoniae 110K/70
UNSPECIFIED. (2004) Expression, purification, crystallization and preliminary characterization of uridine 5 '-diphospho-N-acetylmuramoyl L-alanyl-D-glutamate : lysine ligase (MurE) from Streptococcus pneumoniae 110K/70. ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY, 60 (Part 2). pp. 359-361. ISSN 0907-4449Full text not available from this repository.
Official URL: http://dx.doi.org/10.1107/S0907444903027720
An ORF designated sp1530 (murE) in the Streptococcus pneumoniae TIGR4 genome sequence, identified as uridine 5'-diphospho-N-acetylmuramoyl-L-alanyl-D-glutamate:L-lysine ligase (MurE; EC 22.214.171.124), was cloned into the high-expression plasmid pET21b and overexpressed in Escherichia coli BL21 (DE3) Star. The enzyme was purified in three steps to 99% purity. Crystals were obtained by the hanging-drop vapour-diffusion method at 291 K from solutions containing 25% (w/v) polyethylene glycol 2000 monomethylether, 0.2 M potassium thiocyanate, 0.1 M MES pH 6.5 in the presence of uridine 5'-diphospho-N-acetylmuramoyl alanyl glutamate (UDP-MurNAc-L-Ala-D-Glu) with and without 5'-adenylyl imidophosphate (AMP-PNP), a non-hydrolysable analogue of ATP Diffraction data to 1.5 and 2.7 Angstrom, respectively, were collected at the European Synchrotron Radiation Facility (ESRF). Crystals grown in the presence of two ligands belong to space group P1, with unit-cell parameters a = 68.4, b = 71.4, c = 74.8 Angstrom, alpha = 73.4, beta = 80.5, gamma = 72.3degrees. Crystals grown in the presence of UDP-MurNAc-L-Ala-D-Glu alone belong to space group P2(1), with unit-cell parameters a = 71.1, b=129.4,c=74.6 Angstrom,beta=106.3degrees.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry
Q Science > QH Natural history > QH301 Biology
|Journal or Publication Title:||ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY|
|Official Date:||February 2004|
|Number of Pages:||3|
|Page Range:||pp. 359-361|
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