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Cells > Cellular Structures > Subcellular Fractions > Mitochondria
... > Cells > Cellular Structures > Intracellular Space > Cytoplasm > Cytoplasmic Structures > Organelles > Mitochondria
... > Fluids and Secretions > Body Fluids > Body Fluid Compartments > Intracellular Space > Cytoplasm > Cytoplasmic Structures > Organelles > Mitochondria
... > Tissues > Body Fluid Compartments > Intracellular Space > Cytoplasm > Cytoplasmic Structures > Organelles > Mitochondria

Preferred term

Mitochondria  

Type

  • mesh:Descriptor

Definition

  • Semiautonomous, self-reproducing organelles that occur in the cytoplasm of all cells of most, but not all, eukaryotes. Each mitochondrion is surrounded by a double limiting membrane. The inner membrane is highly invaginated, and its projections are called cristae. Mitochondria are the sites of the reactions of oxidative phosphorylation, which result in the formation of ATP. They contain distinctive RIBOSOMES, transfer RNAs (RNA, TRANSFER); AMINO ACYL T RNA SYNTHETASES; and elongation and termination factors. Mitochondria depend upon genes within the nucleus of the cells in which they reside for many essential messenger RNAs (RNA, MESSENGER). Mitochondria are believed to have arisen from aerobic bacteria that established a symbiotic relationship with primitive protoeukaryotes. (King & Stansfield, A Dictionary of Genetics, 4th ed)

Broader concept

Narrower concepts

Entry terms

  • Mitochondrion

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URI

http://data.loterre.fr/ark:/67375/JVR-D78ZZC1T-G

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