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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 nucleus and form the nuclear envelope; excludes the intermembrane space. The continuous network of membranes encompassing the outer nuclear membrane and the endoplasmic reticulum. The double lipid bilayer enclosing the nucleus and separating its contents from the rest of the cytoplasm; includes the intermembrane space, a gap of width 20-40 nm (also called the perinuclear space). A collection of membranous structures involved in transport within the cell. The main components of the endomembrane system are endoplasmic reticulum, Golgi bodies, vesicles, cell membrane and nuclear envelope. Members of the endomembrane system pass materials through each other or though the use of vesicles. The outer, i.e. cytoplasm-facing, lipid bilayer of the nuclear envelope; continuous with the endoplasmic reticulum of the cell and sometimes studded with ribosomes. Double layer of lipid molecules that encloses all cells, and, in eukaryotes, many organelles; may be a single or double lipid bilayer; also includes associated proteins. The external membrane of Gram-negative bacteria or certain organelles such as mitochondria and chloroplasts; freely permeable to most ions and metabolites. Any constituent part of the nucleus, a membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. Any constituent part of a cell, the basic structural and functional unit of all organisms. The lipid bilayer surrounding an organelle. Located in the nuclear 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. Loosely bound to one surface of the nuclear outer membrane, but not integrated into the hydrophobic region. Any constituent part of a membrane, a double layer of lipid molecules that encloses all cells, and, in eukaryotes, many organelles; may be a single or double lipid bilayer; also includes associated proteins.

View Gene Ontology (GO) Term

GO TERM SUMMARY
Name: nuclear outer membrane
Acc: GO:0005640
Aspect: Cellular Component
Desc: The outer, i.e. cytoplasm-facing, lipid bilayer of the nuclear envelope; continuous with the endoplasmic reticulum of the cell and sometimes studded with ribosomes.
Synonyms:
  • perinuclear membrane
  • outer envelope
Proteins in PDR annotated with:
   This term: 127 [Search]
   Term or descendants: 128 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0005640 - nuclear outer membrane (interactive image map)
YRC Informatics Platform - Version 3.0
Created and Maintained by: Michael Riffle