Emergence of periodic circumferential actin cables from the anisotropic fusion of actin nanoclusters during tubulogenesis.

ABSTRACT: The periodic circumferential cytoskeleton supports various tubular tissues. Radial expansion of the tube lumen causes anisotropic tensile stress, which can be exploited as a geometric cue. However, the molecular machinery linking anisotropy to robust circumferential patterning is poorly understood. Here, we aim to reveal the emergent process of circumferential actin cable formation in a Drosophila tracheal tube. During luminal expansion, sporadic actin nanoclusters emerge and exhibit circumferentially biased motion and fusion. RNAi screening reveals the formin family protein, DAAM, as an essential component responding to tissue anisotropy, and non-muscle myosin II as a component required for nanocluster fusion. An agent-based model simulation suggests that crosslinkers play a crucial role

SUBMITTER: Sekine S 

PROVIDER: S-EPMC10808230 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature