Abstract
M2-1 is an essential co-factor of the respiratory syncytial virus, an important respiratory pathogen in infants and calves. It acts as a transcription antitermination factor which enhances the processivity of the polymerase. Within the polymerase complex, M2-1 interacts with a second co-factor, the phosphoprotein P. It has been shown previously that P and RNA bind to M2-1 in a competitive manner in vitro and that these properties are related to a central domain located between residues Glu59 and Lys177. Here we report the almost complete (1)H, (13)C and (15)N assignment of a fragment of M2-1 corresponding to this region, for further structure determination and interaction studies.
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