NADH dehydrogenase subunit 5 (MT-ND5) (MT-ND5)

NADH dehydrogenase subunit 5 (MT-ND5) is a core, mitochondrially encoded subunit of the NADH:ubiquinone oxidoreductase (Complex I), the first and largest enzyme of the mitochondrial respiratory chain [1]. It is a highly hydrophobic protein located within the membrane arm of Complex I, where it functions as a proton pump, facilitating the translocation of protons across the inner mitochondrial membrane to generate the electrochemical gradient necessary for ATP production [2]. Mutations in the MT-ND5 gene are linked to a spectrum of mitochondrial diseases, most notably MELAS (Mitochondrial Encephalomyopathy, Lactic Acidosis, and Stroke-like episodes) and Leigh syndrome, which result from impaired cellular respiration and energy failure [3]. In the context of pharmacology, ND5 is a component of the broader Complex I target, which is inhibited by various environmental toxins like rotenone and therapeutic agents such as metformin, though the latter's interaction is often indirect or weak [4]. Understanding ND5 is crucial for developing treatments for mitochondrial dysfunction and exploring its role in the metabolic shifts observed in various cancers [5].

Other names

NADH-ubiquinone oxidoreductase chain 5MTND5Complex I subunit 5Mitochondrially encoded NADH dehydrogenase 5

Inhibition of the mitochondrial respiratory chain complex I, disrupting the electron transport chain and proton gradient formation.