ADP/ATP translocase 2 (ANT2)

ADP/ATP translocase 2 (ANT2), also known as Solute carrier family 25 member 5 (SLC25A5), is a critical transport protein located within the inner mitochondrial membrane (UniProt: P05141). Its primary role is to facilitate the exchange of cytosolic ADP for mitochondrial ATP, which is essential for maintaining cellular energy homeostasis and supporting oxidative phosphorylation (PubMed: 29624170). Unlike the ANT1 isoform found in post-mitotic tissues, ANT2 is predominantly expressed in proliferating cells and is frequently upregulated in various cancers to support the metabolic demands of rapid growth, often participating in the glycolytic shift known as the Warburg effect (PubMed: 15150104). In oncology, ANT2 is considered a promising therapeutic target because its inhibition can lead to the collapse of mitochondrial membrane potential and the induction of apoptosis in tumor cells (PubMed: 17597012). Beyond its role in cancer, ANT2 is involved in the regulation of the mitochondrial permeability transition pore (mPTP) and has been linked to certain metabolic and muscle-related pathologies. Experimental strategies targeting ANT2 include small molecule inhibitors, such as atractyloside derivatives, and gene-silencing approaches aimed at sensitizing cancer cells to chemotherapy (PubMed: 22430210).

Other names

Solute carrier family 25 member 5SLC25A5Adenine nucleotide translocator 2Mitochondrial ADP/ATP carrier 2ANT 2T22F1

Inhibition of the adenine nucleotide translocator prevents the export of ATP from the mitochondria and the import of ADP, leading to the depletion of cytosolic ATP, loss of mitochondrial membrane potential, and subsequent induction of the intrinsic apoptotic pathway.