Abstract
Small protein B (SmpB) is an essential molecule in trans-translation which is a universal biological pathway for protein synthesis in bacteria. Trans-translation can release stalled ribosomes from defective mRNAs and target tag-protein fragments for degradation, and then restart protein synthesis. The SmpB-tmRNA complex coordinating with other components of the trans-translation system, plays vital roles in Mycobacterium tuberculosis under both stress conditions and non-replicating conditions. Thus, elucidation of molecular details and dynamic properties of the SmpB-tmRNA interaction is a crucial step towards effectively blocking trans-translation process to shorten the duration of tuberculosis treatment. Here, we report resonance assignments for 1H, 13C and 15N of M. tuberculosis SmpB (MtSmpB, spanning residues 4-133) protein determined by a suite of2D/3D heteronuclear NMR experiments along with predicted the secondary structure.
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