Structure of Influenza B PB2 cap-binding domain with Q325F mutation complex with m7GDP

The crystal structure of the PB2 cap-binding domain of influenza B virus reveals a novel cap recognition mechanism.

GSHMKIRQRFRFGRLELKRISGRGFKNDEEILIGNGTIQKIGIWDGEEEFHVRCGECRGILKKSKMKLEKLLINSAKKED
MRDLIILCMVFSQDTRMFQGVRGEINFLNRAGQLLSPMYQLQRYFLNRSSDLFDQWGYEESPKASELHGINESMNASDYT
LKGVVVTKN

25% PEG 3350, 0.2M ammonium acetate, 0.1M Tris, pH 8.5, VAPOR DIFFUSION, SITTING DROP, temperature 293K

THIS SEQUENCE IS FROM INFLUENZA B VIRUS (B/JIANGXI/BV/2006) WHICH WAS NOT SUBMITTED IN UNP. RESIUDES 316-319 ARE THE EXPRESSION TAG. RESIDUE 325 REPRESENTS MUTATION Q325F.

HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS