Backbone resonance assignment for the N-terminal region of bacterial tRNA-(N1G37) methyltransferase

Bacterial tRNA (guanine37-N1)-methyltransferase (TrmD) is an important antibacterial target due to its essential role in translation. TrmD has two domains connected with a flexible linker. The N-terminal domain (NTD) of TrmD contains the S-adenosyl-l-methionine (SAM) cofactor binding site and the C-terminal domain is critical for tRNA binding. Here we report the backbone NMR resonance assignments for NTD of Pseudomonas aeruginosa TrmD. Its secondary structure was determined based on the assigned resonances. Relaxation analysis revealed that NTD existed as dimers in solution. NTD also exhibited thermal stability in solution. Its interactions with SAM and other compounds suggest it can be used for evaluating SAM competitive inhibitors by NMR.Agency for Science, Technology and Research (A*STAR)National Research Foundation (NRF)Singapore-MIT Alliance for Research and Technology (SMART)CK appreciates the support from A*STAR JCO grant (1431AFG102/1331A028). This work is also supported by National Research Foundation of Singapore through the Singapore-MIT-Alliance for Research and Technology (SMART) Infectious Disease and Antimicrobial Resistance Interdisciplinary Research Groups. W.Z. was supported by a SMART Scholar Fellowship. We also thank Prof Ho Sup Yoon and Dr. Hong Ye from Nanyang Technological University for the supporting NMR experiments. The authors appreciate the valuable discussion from the team members at ETC, A*STAR