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Transverse tubules (T-tubules) play a significant role in muscle contraction. However, the underlying mechanism of their formation is yet to be elucidated. In a recent study, a research team from Japan used a Drosophila model to understand this process. The results show the involvement of LUBEL, an E3 ubiquitin ligase, in the T-tubule biogenesis. Beyond LUBEL's role in immune response, the study reveals an unexpected function of linear ubiquitination in membrane deformation, driven by BAR-domain proteins.

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