Yeast tyrosyl-tRNA synthetase (yTyrRS) has been crystallized by the vapor diffusion method in the presence of its cognate tRNA(Tyr). The crystals belong to a tetragonal space group P4(1)2(1)2 with cell dimensions of a = b = 63.85 Angstrom, and c = 330.3 Angstrom. The asymmetric unit contains one molecule each of yTyrRS and tRNA(Tyr) (one-half of a 2:2 complex). X-ray diffraction data have been collected up to 2.5 Angstrom resolution.
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