Mitochondrial electron transport chain complexes and cellular lipid membranes (ETC-IMM complex)

The mitochondrial electron transport chain (ETC) complexes and cellular lipid membranes, specifically the inner mitochondrial membrane (IMM), form the structural and functional core of cellular bioenergetics (Khan Academy, 2025). The ETC consists of five multi-subunit protein complexes (I-V) that facilitate electron transfer and proton pumping to generate an electrochemical gradient for ATP synthesis (AHA Journals, 2025). A key lipid component, cardiolipin, is essential for anchoring these complexes into functional supercomplexes or respirasomes, which optimize electron flow and minimize the production of reactive oxygen species (ROS) (MDPI, 2025). Dysfunction in this target, often characterized by cardiolipin depletion or peroxidation, leads to impaired energy production and oxidative stress, contributing to diseases such as Barth syndrome, heart failure, and neurodegeneration (NIH, 2026). Therapeutic agents like elamipretide target this site by binding to cardiolipin, thereby stabilizing the IMM architecture and restoring efficient oxidative phosphorylation (Stealth BioTherapeutics, 2025). This target represents a novel approach in mitochondrial medicine, focusing on structural repair of the organelle's energy-producing machinery rather than just symptomatic management (Wellfounded Health, 2025).

Other names

Mitochondrial respiratory chainInner mitochondrial membrane (IMM)Cardiolipin-ETC supercomplexesRespirasomesMitochondrial cristae

Stabilization of cardiolipin within the inner mitochondrial membrane to optimize electron transport chain supercomplex assembly, thereby enhancing ATP production and reducing reactive oxygen species (ROS) leakage.