A three-start helical sheath on the flagellar filament of Caulobacter crescentus.
An unusual feature in preparations of the Caulobacter crescentus flagellar filaments is that some filaments are surrounded by a set of three windings that form a sheath. We provide evidence that the sheath is composed of subunits having a molecular mass of 24,000 Da. We suggest that the sheath could be composed of protofilaments of flagellin wound around the filament.
Trachtenberg
S
S
Department of Membrane and Ultrastructure Research, Hebrew University-Hadassah Medical School, Jerusalem, Israel.
DeRosier
D J
DJ
D016935:Caulobacter crescentus / Q000648:ultrastructure*; D005407:Flagella / Q000648:ultrastructure*; D007091:Image Processing, Computer-Assisted; D008854:Microscopy, Electron; D011487:Protein Conformation