1H, 13C and 15N resonance assignments of SARS-CoV main protease N-terminal domain

The main protease (M-pro) of severe acute respiratory syndrome coronavirus (SARS-CoV) plays an essential role in the extensive proteolytic processing of the viral polyproteins (pp1a and pp1ab), and it is an important target for anti-SARS drug development. SARS-CoV M-pro is composed of a catalytic N-terminal domain and an alpha-helical C-terminal domain linked by a long loop. Even though the N-terminal domain of SARS-CoV M-pro adopts a similar chymotrypsin-like fold as that of piconavirus 3C protease, the extra C-terminal domain is required for SARS-CoV M-pro to be enzymatically active. Here, we reported the NMR assignments of the SARS-CoV M-pro N-terminal domain alone, which are essential for its solution structure determination.