ATP synthase subunit delta, mitochondrial (ATP5F1D)

ATP synthase subunit delta, mitochondrial (ATP5F1D), is a nuclear-encoded protein that forms part of the catalytic F1 core of mitochondrial ATP synthase (Complex V), a key enzyme in cellular oxidative phosphorylation. The delta subunit participates in the coupling of proton translocation (via F0) to ATP synthesis at the beta subunits of F1 by contributing to the rotary mechanism connecting the membrane-embedded F0 proton channel to the matrix-localized F1 catalytic domain[1][2][3][4]. Dysfunctions or mutations in ATP5F1D can result in severe mitochondrial disorders characterized by episodic metabolic crises, lactic acidosis, and sometimes neurodegenerative symptoms due to impaired ATP production[1]. The enzyme is essential and highly conserved, reflecting its centrality to fundamental bioenergetic processes in virtually all human cells[1][6]. Notes: - No FDA-approved drugs directly target ATP5F1D, but mitochondrial ATP synthase itself is an emerging pharmacological target for modulating cell metabolism or apoptosis in selected disease contexts[2]. - IF1 (ATPase inhibitory factor 1) is a modulator protein that interacts with F1 to prevent ATP hydrolysis under pathological conditions, but it is not a drug directly targeting the delta subunit[2]. - The protein is sometimes referred to by older gene symbols (e.g., ATP5D) in legacy literature. - This is not a typical receptor or conventional molecular drug target but is an enzyme subunit vital for energy metabolism.

Other names

ATP synthase F1 subunit deltaATP5DF-ATPase delta subunitMC5DN5ATP synthase, H+ transporting, mitochondrial F1 complex, delta subunitmitochondrial ATP synthase complex delta-subunit precursor