Fig. 6: Coordination between the PTC maturation and tunnel construction.
From: Structural snapshots of human pre-60S ribosomal particles before and after nuclear export
a Overviews of pre-60S density maps (state A, B and C) shown in surface representation, with components of the PTC-PET individually colored. Zoom-in views on the PTC-PET components (H89 to H93, H90-H93 linker and H73-H74 liker) are shown in lower panels. b, c Diagrams of secondary structures of the PTC-PET components in the immature state A (b) and mature-like state B/C (c), highlighting the contrasting base-pair and base-stacking interactions between the two states. Base-pairings are indicated by black lines and stacking interactions by dashed lines and circles.
