Resonance assignments and secondary structure prediction of secretory protein Rv0603 from Mycobacterium tuberculosis H37Rv

We report the NMR resonance assignments of N-terminal signal sequence deleted secretory protein Rv0603 (∆ 1-28 -Rv0603) from Mycobacterium tuberculosis H37Rv. ∆ 1-28 -Rv0603 displayed good peak yield and signal dispersion in 2D [ 15 N- 1 H] HSQC spectrum, which prompted us to proceed for resonance assignments on this construct. Standard triple-resonance experiments for resonance assignments were recorded on [U- 15 N]-∆Rv0603 and [U- 15 N, 13 C]-∆Rv0603 samples. We obtained 97% of backbone 1 H N , 98% of 13 C α , 98% of 1 H α , 96% of 13 C´, 100% of 13 C β , 100% of 1 H β and 98% of side-chain 1 H chemical shifts. This protein does not show any sequence similarity to any other protein of known structure. Determination of its solution structure would facilitate understanding of its biological function.