Fig. 3: The structure of Acinetobacter T4P.
From: Structural basis of Acinetobacter type IV pili targeting by an RNA virus
a The cryo-EM density map of Acinetobacter T4P displayed at an isosurface threshold of 0.065σ with diameter, helical rise and helical twist labeled (left column). The same density map displayed at a lower isosurface threshold of 0.025σ, which shows the density for glycans (yellow) on the pilus (middle column). The atomic model of Acinetobacter T4P (right column). b The atomic model of one pilin. Colored boxes indicate the zoomed-in regions in Panels (d–h). The distance between Gly78 and Ser79 is around 13 Å. c The cartoon illustration for the secondary structure of the Acinetobacter Type IV pilin. d and e The model and map showing disulfide bonds of Cys57/Cys67 (Panel d) and Cys132/Cys145 (Panel e), respectively. f The cryo-EM density around Ser79. g The cryo-EM density around Gly78. h The zoomed-in view of the glycosylation site at Ser147. The glycan density (yellow) is weaker than the protein density and displayed at an isosurface threshold of 0.025σ.
