¹H, ¹³C and ¹⁵N resonance assignment of the N-terminal domain of human lysyl aminoacyl tRNA synthetase.

Human lysyl aminoacyl tRNA synthetase (hLysRS) is integral to a variety of different functions ranging from protein biosynthesis, initiation of a proinflammatory response as well as signal transduction. Another important, non-canonical function of hLysRS is that it chaperones tRNA(Lys,3), the HIV-1 reverse transcription primer molecule into new HIV-1 particles. Since the N-terminal domain of hLysRS has been shown to be essential for such primer uptake, NMR studies of this domain are being conducted to obtain a better understanding of how hLysRS interacts with the primer tRNA. In order to study the RNA binding behavior of this domain, we are studying its complex with a fragment of the cognate tRNA corresponding to the tRNA anticodon loop. We report herein the backbone and side chain NMR resonance assignments of uniformly (15)N-, (13)C-labeled hLysRS N-terminal domain alone, as well as complexed to RNA.