Fig. 4: Inner tube structure of phage ϕKp24 and sheath-tube interaction. | Nature Communications

Fig. 4: Inner tube structure of phage ϕKp24 and sheath-tube interaction.

From: High-resolution reconstruction of a Jumbo-bacteriophage infecting capsulated bacteria using hyperbranched tail fibers

Fig. 4

a Ribbon diagram of the predicted AlphaFold2 model of ϕKp24’s tube-protein monomer gp119, rainbow-colored in ChimeraX. b Ribbon diagram of two discs (hexamers) in the tube of phage ϕKp24, one typical gp119 was shown in rainbow color. c Cut-away view as ribbon diagram of the tube structure (three discs). d electrostatic diagrams showing the inner surface of the tube structure in c. Charge distribution: red = negative; blue = positive; white = neutral. Electrostatic potential was colored in ChimeraX. e Side views of the interface between a part of sheath protein (C-terminal domain of central sheath) and four tube-protein subunits. The residue R623 of gp118 can interact with residue D268 of gp119 using salt-bridge (the enlarged rectangular box, up left panel). f The charged surface of e. g An open-book view of f. The complementary patches of interacting charges on both sheath and tube are marked with ovals.

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