Crystallization and preliminary X-ray crystallographic study of leucyl-tRNA synthetase from the archaeon Pyrococcus horikoshii

Acta Crystallographica. Section D, Biological Crystallography
Ryuya Fukunaga, S Yokoyama

Abstract

The leucyl-tRNA synthetase (LeuRS) from the archaeon Pyrococcus horikoshii was overexpressed in a C-terminally truncated form in Escherichia coli, purified and crystallized by the hanging-drop vapour-diffusion method using ammonium sulfate as a precipitant. The crystals belong to the rhombohedral space group R3, with unit-cell parameters a = b = 186.20, c = 91.43 A, alpha = beta = 90, gamma = 120 degrees. The asymmetric unit contains one molecule of LeuRS, with a corresponding crystal volume per protein weight of 3.2 A3 Da(-1) and a solvent content of 60.7%. A data set diffracting to 2.2 A resolution was collected from a single crystal at 100 K. Selenomethionine-substituted protein crystals were prepared in order to solve the structure by the SAD phasing method.

Citations

Sep 13, 2005·Nature Structural & Molecular Biology·Ryuya Fukunaga, Shigeyuki Yokoyama
Mar 2, 2006·Acta Crystallographica. Section F, Structural Biology and Crystallization Communications·Ryuya FukunagaShigeyuki Yokoyama

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