TrkC has distinct spatiotemporal dynamics compared to TrkA and TrkB

TrkCKID shows markedly reduced downstream ERK signalling versus TrkA and TrkB, while both TrkC isoforms traffic more slowly from the cell surface despite strong dimerisation.

• Why it matters: Distinct receptor dynamics can shape neurotrophin signalling outcomes, yet TrkC’s spatiotemporal behavior—especially with its KID-containing isoform—has been less directly compared to TrkA and TrkB.
• What they did: Using FRET and BRET biosensors, the study compared TrkA, TrkB, TrkCdeltaKID, and TrkCKID for ERK signalling, receptor dimerisation, and trafficking, including testing activation by non-canonical ligands.
• The result: TrkCdeltaKID matched TrkA/TrkB ERK signalling, whereas TrkCKID reduced ERK output; both TrkC isoforms trafficked away more slowly, suggesting isoform-specific targets for neurotrophic drug discovery.

AI summary of the abstract · may contain errors · not medical advice · read the paper.