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A prolongation or process extending from a nerve cell, e.g. an axon or dendrite. The basic structural and functional unit of all organisms. Includes the plasma membrane and any external encapsulating structures such as the cell wall and cell envelope. A long, thin, polarized cell projection that contains actin and can extend for distances many times the diameter of the cell. Cytonemes represent extensions of cell cytoplasm and typically have a diameter of approximately 0.2um. A prolongation or process extending from a cell, e.g. a flagellum or axon. The part of a cell or its extracellular environment in which a gene product is located. A gene product may be located in one or more parts of a cell and its location may be as specific as a particular macromolecular complex, that is, a stable, persistent association of macromolecules that function together. Any constituent part of a cell projection, a prolongation or process extending from a cell, e.g. a flagellum or axon. Thin, stiff protrusion extended by the leading edge of a motile cell such as a crawling fibroblast or amoeba, or an axonal growth cone; usually approximately 0.1 um wide, 5-10 um long, can be up to 50 um long in axon growth cones; contains a loose bundle of about 20 actin filaments oriented with their plus ends pointing outward. A long, thin cell projection that contains F-actin and tubulin, with microtubules centrally located and F-actin peripherally located. Projection at the leading edge of a crawling cell; the protrusions are supported by a microfilament meshwork. A thin sheetlike process extended by the leading edge of a crawling fibroblast; contains a dense meshwork of actin filaments. A temporary protrusion or retractile process of a cell, associated with flowing movements of the protoplasm, and serving for locomotion and feeding. Long whiplike or feathery structures borne either singly or in groups by the motile cells of many bacteria and unicellular eukaryotes and by the motile male gametes of many eukaryotic organisms, which propel the cell through a liquid medium. Dense covering of microvilli on the apical surface of epithelial cells in tissues such as the intestine, kidney, and choroid plexus; the microvilli aid absorption by increasing the surface area of the cell. A specialized eukaryotic organelle that consists of a filiform extrusion of the cell surface. Each cilium is bounded by an extrusion of the cytoplasmic membrane, and contains a regular longitudinal array of microtubules, anchored basally in a centriole. Thin cylindrical membrane-covered projections on the surface of an animal cell containing a core bundle of actin filaments. Present in especially large numbers on the absorptive surface of intestinal cells. A cell extension characterized by rapid formation, rounded shape, and scarcity of organelles within the protrusions. Complex basket- or funnel-like structure used by the cell to collect food and channel it to the cytostome; includes specialized sub-structures made up of closely-spaced cilia and underlying basal bodies and fibrillar systems. A cell projection that forms at the site of macropinocytosis, a form of endocytosis that results in the uptake of relatively large amounts of extracellular fluid. The macropinocytic cup membrane selectively excludes certain proteins, such as H36 or PM4C4 in Dictyostelium, and the underlying cytoskeleton is enriched in F-actin and coronin. A cell projection that emerges from the ECM-facing surface of a cell, is enriched in actin and associated cytoskeletal proteins, and displays localized proteolytic activity toward the substrate. Any constituent part of a cell, the basic structural and functional unit of all organisms. A membrane projection with related cytoskeletal components at the trailing edge of a cell in the process of migrating or being activated, found on the opposite side of the cell from the leading edge or immunological synapse, respectively. A proteinaceous hair-like appendage on the surface of bacteria ranging from 2-8 nm in diameter. The projection formed by unicellular fungi in response to mating pheromone. The specialized microvillar organelle on the apical surfaces of a photoreceptor cell containing the visual pigment rhodopsin and most of the proteins involved in phototransduction.

View Gene Ontology (GO) Term


Name: cell projection
Acc: GO:0042995
Aspect: Cellular Component
Desc: A prolongation or process extending from a cell, e.g. a flagellum or axon.
  • cellular process
  • cell process
  • cellular projection
Proteins in PDR annotated with:
   This term: 217 [Search]
   Term or descendants: 2492 [Search]


GO:0042995 - cell projection (interactive image map)

YRC Informatics Platform - Version 3.0
Created and Maintained by: Michael Riffle