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MCU-i4 is a negative modulator of the mitochondrial calcium uniporter (MCU) complex that directly binds a specific cleft in MICU1 and decreases mitochondrial Ca2+ influx.
MCU-i4 is a negative modulator of the mitochondrial calcium uniporter (MCU) complex that directly binds a specific cleft in MICU1 and decreases mitochondrial Ca2+ influx.
MCU-i4 decreases mitochondrial Ca2+ influx. Docking simulations reveal that MCU-i4 directly binds a specific cleft in MICU1, a key element of the MCU complex that controls channel gating. Accordingly, in MICU1-silenced or deleted cells, the inhibitory effect of MCU-i4 is lost. Moreover, MCU-i4 fails to inhibit mitochondrial Ca2+ uptake in cells expressing a MICU1 mutated in the critical amino acids that forge the predicted binding cleft.[1]
[1] Giulia Di Marco, et al. Cell Rep. 2020 Feb 18;30(7):2321-2331.e6.
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