Mitochondrial matrix

The **mitochondrial matrix** is the gel-like compartment enclosed by the inner membrane of the mitochondrion. It is not a single molecule or classical drug target, but rather an organellar subcompartment. The matrix contains enzymes that drive critical metabolic reactions, including the citric acid cycle and the beta-oxidation of fatty acids, and hosts the machinery for mitochondrial DNA replication, transcription, and translation. It provides the setting for ATP production by housing components essential for oxidative phosphorylation and ATP synthase activity. The matrix also maintains mitochondrial calcium and other ion pools, and participates in the regulation of apoptosis and cellular metabolism. Defects or dysfunction in its components and environment are implicated in a wide spectrum of mitochondrial and metabolic diseases[1][2][3][4][5][9]. **Important clarification:** The "mitochondrial matrix" is not itself a discrete protein, enzyme, receptor, transporter, or nucleic acid, and thus it is not considered a therapeutic target in the conventional sense. It is a structural and functional compartment within mitochondria[1][2][3][5]. It should not be used as a canonical target for drug discovery or molecular targeting databases, except as context or location for specific mitochondrial proteins, enzymes, or complexes (e.g., ATP synthase, matrix proteases, or enzymes of the citric acid cycle).

Other names

mitochondrial fluidmatrix (of mitochondrion)