Fig. 3: Structural organization of Milano baseplate junction.

A schematic is shown in the upper left corner. The central assembly (tube + baseplate centerpiece + baseplate hub + baseplate central spike) is surrounded by a red dashed line. Tail-sheath, tube, baseplate centerpiece (BCP), baseplate wedge (BW), and receptor-binding complex (tail-spike + short tail-fibers + garland) are arranged in C6 symmetry, while baseplate hub (BH) and baseplate central spike (BCS) have a C3 symmetry. Top-view of individual sub-structures (BCP, gp25, baseplate centerpiece; BH, gp26, baseplate hub; BCS, gp27, baseplate central spike; BW1, gp28, baseplate wedge 1; BW2, gp29, baseplate wedge 2; BW3, gp30, baseplate wedge 3; GF, gp125/gp127 garland forming proteins) are shown on the right.