In this study, the research group developed a novel tool, MiMSBiT, which enables real-time and quantitative measurement of contacts between mitochondria and melanosomes in living cells. Using this tool, the study revealed that mitochondria physically interact with melanosomes and supply ATP required for melanin production.
Furthermore, the study demonstrated that disruption of this contact impairs melanosome maturation and reduces melanin synthesis, establishing a new principle that links mitochondrial function with pigmentation. These findings are expected to advance the understanding of pigmentation mechanisms and provide a foundation for future studies on aging-related pigment changes and related disorders.
Left panel: Schematic overview of MiMSBiT, a reversible system for quantifying mitochondria–melanosome contacts in living cells.
Right panel: Mfn2 on mitochondria and STIM1 on melanosomes mediate mitochondria–melanosome contact, promoting melanosome maturation and facilitating melanin pigmentation.
Papers
Journal: Nature Communications
Title: STIM1-Mitofusin2 interactions tether mitochondria and melanosome contacts that promote melanosome maturation
Authors: Isshin Shiiba, Yuto Ishikawa, Hijiri Oshio, Naoki Ito, Fuya Yamaguchi, Shun Nagashima, Hideya Ando, Keitaro Umezawa, Yuri Miura, Yuhei Araiso, Koki Nakamura, Yusuke Hirabayashi, Ryoko Inatome & Shigeru Yanagi
Faster Quantum Measurement Algorithm Enhanced by Symmetry: Toward the practical realization of fault-tolerant quantum simulation
Stem cell-based modeling and single-cell multiomics reveal gene-regulatory mechanisms underlying human skeletal development
