Keratin filaments and soluble vimentin interact with isoform specificity to organize cell signaling.

Soluble vimentin interacts with keratin 6A filaments to promote signaling in epithelial cells, especially during skin wound healing and cancer development.

• Why it matters: Understanding how intermediate filaments organize cell signaling can reveal new mechanisms of tissue regulation and disease progression.
• What they did: The study examined interactions between keratin IFs and soluble vimentin in epithelial cells, focusing on the intrinsically disordered head domains and keratin 6A-containing filaments.
• The result: Findings show that soluble vimentin recruits kinases and myosin to keratin filaments, activating signaling pathways, which may influence tissue responses in specific cellular contexts.