Fig. 3: Atomic structure of the E217 sheath.
From: High-resolution cryo-EM structure of the Pseudomonas bacteriophage E217
Cryo-EM reconstructions of the contracted (a) and extended (b) sheaths calculated at 3.1 Å resolution at 0.143 FSC and displayed at 3 σ. c Ribbon diagram of all sheath subunits in one helical pitch of extended (purple) versus contracted (cyan) sheaths. d Superimposition of sheath protomers in the extended versus contracted conformations. Three regions undergo the most significant conformational rearrangements: the N-terminal arm (res. 1–23), C-terminal β-turn (res. 460–488), and C-terminal tail (res. 491–504).
