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A double membrane structure enclosing an organelle, including two lipid bilayers and the region between them. In some cases, an organelle envelope may have more than two membranes. The outer, i.e. cytoplasm-facing in a cellular organelle, lipid bilayer of an organelle envelope. Either of the lipid bilayers that surround the mitochondrion and form the mitochondrial envelope. A large complex of the mitochondrial outer membrane that mediates transport of proteins into all mitochondrial compartments. The outer, i.e. cytoplasm-facing, lipid bilayer of the mitochondrial envelope. The double lipid bilayer enclosing the mitochondrion and separating its contents from the cell cytoplasm; includes the intermembrane space. A protein complex that links the endoplasmic reticulum with mitochondria and may have a role in promoting exchange of calcium and phospholipids between the two organelles. The complex is also associated with actively replicating mitochondrial DNA nucleoids, and may further coordinate mitochondrial genome replication and membrane growth. The external membrane of Gram-negative bacteria or certain organelles such as mitochondria and chloroplasts; freely permeable to most ions and metabolites. A large complex of the mitochondrial outer membrane that mediates sorting of some imported proteins to the outer membrane and their assembly in the membrane; functions after import of incoming proteins by the mitochondrial outer membrane translocase complex. The lipid bilayer surrounding an organelle. Any constituent part of a mitochondrion, a semiautonomous, self replicating organelle that occurs in varying numbers, shapes, and sizes in the cytoplasm of virtually all eukaryotic cells. It is notably the site of tissue respiration. Located in the mitochondrial outer membrane such that some covalently attached portion of the gene product, for example part of a peptide sequence or some other covalently attached moiety such as a GPI anchor, spans or is embedded in one or both leaflets of the membrane. Any constituent part of the living contents of a cell; the matter contained within (but not including) the plasma membrane, usually taken to exclude large vacuoles and masses of secretory or ingested material. In eukaryotes it includes the nucleus and cytoplasm.

View Gene Ontology (GO) Term

GO TERM SUMMARY
Name: mitochondrial outer membrane
Acc: GO:0005741
Aspect: Cellular Component
Desc: The outer, i.e. cytoplasm-facing, lipid bilayer of the mitochondrial envelope.
Synonyms:
  • outer mitochondrial membrane
Proteins in PDR annotated with:
   This term: 347 [Search]
   Term or descendants: 412 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0005741 - mitochondrial outer membrane (interactive image map)
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