Figure 4. Comparing the models of Myxococcus xanthus T6SS sheath and R‐type pyocin in different conformations.

• A
  Top view of the extended M. xanthus T6SS sheath model containing five layers of MxTssBC‐MxHcp hexamers. The sheath is colored gray, with the recycling domain colored cyan. The Hcp inner tube is colored red.
• B
  Side view of the model in (A), with only the front half shown for clarity. One protofilament of the sheath is colored orange.
• C
  Back view (from inside the tube) of model shown in (B). Here, only the attachment α‐helices in one protofilament of the sheath are colored orange.
• D–F
  The same representations as in (A–C) but for the contracted M. xanthus T6SS sheath.
• G–L
  The same representations as in (A–F) but for the R‐type pyocin.