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GO:0005575
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cellular_component
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A location, relative to cellular compartments and structures, occupied by a macromolecular machine. There are three types of cellular components described in the gene ontology: (1) the cellular anatomical entity where a gene product carries out a molecular function (e.g., plasma membrane, cytoskeleton) or membrane-enclosed compartments (e.g., mitochondrion); (2) virion components, where viral proteins act, and (3) the stable macromolecular complexes of which gene product are parts (e.g., the clathrin complex). |
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GO:0110165
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cellular anatomical structure
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A part of a cellular organism consisting of a material entity with granularity above the level of a protein complex but below that of an anatomical system. Note that cellular organisms exclude viruses. |
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GO:0071944
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cell periphery
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The broad region around and including the plasma membrane of a cell, encompassing the cell cortex (inside the cell), the plasma membrane, and any external encapsulating structures. |
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GO:0031012
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extracellular matrix
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A structure lying external to one or more cells, which provides structural support, biochemical or biomechanical cues for cells or tissues. |
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GO:0030312
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external encapsulating structure
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A structure that lies outside the plasma membrane and surrounds the entire cell or cells. This does not include the periplasmic space. |
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GO:0062023
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collagen-containing extracellular matrix
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An extracellular matrix consisting mainly of proteins (especially collagen) and glycosaminoglycans (mostly as proteoglycans) that provides not only essential physical scaffolding for the cellular constituents but can also initiate crucial biochemical and biomechanical cues required for tissue morphogenesis, differentiation and homeostasis. The components are secreted by cells in the vicinity and form a sheet underlying or overlying cells such as endothelial and epithelial cells. |
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GO:0140047
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specialized extracellular matrix
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Species or cell-type specific extracellular matrices that are different from the two main types of extracellular matrices: the interstitial ECM and the basement membrane ECM in metazoa. |
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GO:0060102
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cuticular extracellular matrix
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A collagen and cuticulin-based noncellular, multilayered structure that is synthesized by an underlying ectodermal (hypodermal) cell layer. The cuticle serves essential functions in body morphology, locomotion, and environmental protection. An example of this component is found in Caenorhabditis elegans. |
