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Any of the various assemblies in which collagen chains form a left-handed triple helix; may assemble into higher order structures. Any constituent part of the collagen and cuticulin-based cuticle extracellular matrix, a collagen and cuticulin-based noncellular, multilayered structure that is synthesized by an underlying ectodermal (hypodermal) cell layer. Region of plant cell wall specialised to act as a seal to prevent back leakage of secreted material (analogous to tight junction between epithelial cells). Found particularly where root parenchymal cells secrete solutes into xylem vessels. The barrier is composed of suberin; a fatty substance, containing long chain fatty acids and fatty esters, also found in the cell walls of cork cells (phellem) in higher plants. A fibrous network that is part of the hyalin layer extracellular matrix. The apical lamina is thought to be principally composed of the glycoproteins fibropellins. This matrix has been found in echinoderms. A small pore in the outer wall of a mycelial spore through which the germ tube exits upon germination. It can be apical or eccentric in its location. The layer of sexine which forms a roof over the columella, granules or other infratectal elements. Extracellular matrix material consisting of polysaccharides and protein. The innermost of the major layers of the pollen grain wall which underlies the exine and borders the cytoplasm. The outer, sculptured layer of the exine, which lies above the nexine. The inner, non-sculptured part of the exine which lies below the sexine. The third layer of the sexine. A rod-like element of the sexine and ectexine, supporting either the tectum (the layer of sexine which forms a roof over the columella), or supporting a caput (an architectural element on top of a columella). The inner layer of the ectexine. The inner part of the exine, which stains. A layer of the basal lamina that contains collagen fibrils and connects the basal lamina to the underlying connective tissue. The electron-lucent layer of the basal lamina adjacent to the basal plasma membrane of the cells that rest on the lamina. The electron-dense layer of the basal lamina; lies just below the lamina lucida. A thin sheet of proteoglycans and glycoproteins, especially laminin, secreted by cells as an extracellular matrix. The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite. The narrow gap that separates the presynaptic and postsynaptic membranes, into which neurotransmitter is released. 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. The gel-like pectin matrix consists of the interlinked acidic and neutral pectin networks that are further cross-linked by calcium bridges. Pectins consist largely of long chains of mostly galacturonic acid units (typically 1,4 linkages and sometimes methyl esters). Three major pectic polysaccharides (homogalacturonan, rhamnogalacturonan I and rhamnogalacturonan II) are thought to occur in all primary cell walls. A thin layer of dense material found in various animal tissues interposed between the cells and the adjacent connective tissue. It consists of the basal lamina plus an associated layer of reticulin fibers. A layer of extracellular matrix deposited onto the surface of the pollen wall upon disintegration of the tapetal layer of the anther wall in the late stages of pollen development. The composition of this material is highly heterogeneous and includes waxes, lipid droplets, small aromatic molecules, and proteins. The pollen coat is proposed to have many functions, such as holding pollen in the anther until dispersal, facilitation of pollen dispersal, protection of pollen from water loss and UV radiation, and facilitation of adhesion of pollen to the stigma. A structure lying external to one or more cells, which provides structural support for cells or tissues; may be completely external to the cell (as in animals) or be part of the cell (as in plants). A network of glycoproteins; proteins with covalently attached sugar units, either bonded via the hydroxyl group of serine or threonine (O glycosylated) or through the amino terminal of asparagine (N glycosylated). Network composed of hemicelluloses; members of a class of plant cell wall polysaccharide that cannot be extracted from the wall by hot water or chelating agents, but can be extracted by aqueous alkali. Includes xylan, glucuronoxylan, arabinoxylan, arabinogalactan II, glucomannan, xyloglucan and galactomannan. A large, extracellular glycoprotein complex composed of three different polypeptide chains, alpha, beta and gamma. Provides an integral part of the structural scaffolding of basement membranes. A network composed of lignin; a complex polymer of phenylpropanoid subunits, laid down in the walls of plant cells such as xylem vessels and sclerenchyma. It imparts considerable strength to the wall and also protects it against degradation by microorganisms. It is also laid down as a defence reaction against pathogenic attack, as part of the hypersensitive response of plants. Fatty substance, containing long chain fatty acids and fatty esters, found in the cell walls of cork cells (phellem) in higher plants. Renders the cell wall impervious to water. The outer part of the exine, which stains positively with basic fuchsin in optical microscopy and has higher electron density in conventionally prepared TEM sections. The outer layer of the pollen grain wall which is composed primarily of sporopollenin. The complex wall surrounding a pollen grain. A small, granular structure that is found in the extracellular matrix of cell of the secretory tapetal layer that surrounds developing pollen grains. Ubisch bodies have a sporopollenin coat, are attached to the peritapetal wall, and may play a role in pollen development. Any constituent part of the extracellular matrix, the structure lying external to one or more cells, which provides structural support for cells or tissues; may be completely external to the cell (as in animals) or be part of the cell (as often seen in plants). Any constituent part of the extracellular region, the space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers constituent parts of the host cell environment outside an intracellular parasite.

View Gene Ontology (GO) Term

GO TERM SUMMARY
Name: extracellular matrix part
Acc: GO:0044420
Aspect: Cellular Component
Desc: Any constituent part of the extracellular matrix, the structure lying external to one or more cells, which provides structural support for cells or tissues; may be completely external to the cell (as in animals) or be part of the cell (as often seen in plants).
Proteins in PDR annotated with:
   This term: 3 [Search]
   Term or descendants: 282 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0044420 - extracellular matrix part (interactive image map)
YRC Informatics Platform - Version 3.0
Created and Maintained by: Michael Riffle