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A complex of cell wall invaginations in a synergid cell, similar to those in transfer cells. A structure that lies outside the plasma membrane and surrounds the entire cell. The rigid or semi-rigid envelope lying outside the cell membrane of plant, fungal, and most prokaryotic cells, maintaining their shape and protecting them from osmotic lysis. In plants it is made of cellulose and, often, lignin; in fungi it is composed largely of polysaccharides; in bacteria it is composed of peptidoglycan. Any constituent part of an external encapsulating structure, a structure that lies outside the plasma membrane and surrounds the entire cell. Crater-like ring of chitinous scar tissue located on the surface of the daughter cell, in budding fungi, at the site of separation from the mother cell. It is formed after the newly emerged daughter cell separates, thereby marking the site of cytokinesis and septation. 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. The cell wall material that surrounds the septum in fungal cells. 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. Crater-like ring of chitinous scar tissue located on the surface of the mother cell. It is formed after the newly emerged daughter cell separates thereby marking the site of cytokinesis and septation. The number of bud scars that accumulate on the surface of a cell is a useful determinant of replicative age. Cellulose is a straight chain polysaccharide composed of B(14) linked glucose subunits. It is a major component of plant cell walls where it is found as microfibrils laid down in orthogonal layers. Higher plant microfibrils are about 10nm in diameter and extremely long in relation to their width. The cellulose molecules are oriented parallel to the long axis of the microfibril in a paracrystalline array, which provides great tensile strength. The microfibrils are held in place by the wall matrix and their orientation is closely controlled by the cell. 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). The side of the cell wall that is opposite to the side that faces the cell and its contents. The second outermost layer of the spore wall, as described in Saccharomyces. 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. The outermost layer of the spore wall, as described in Saccharomyces. 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. Either of the two innermost layers of the spore wall, as described in Saccharomyces. 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. Any constituent part of a cell, the basic structural and functional unit of all organisms. Any constituent part of the cell wall, the rigid or semi-rigid envelope lying outside the cell membrane of plant, fungal, and most prokaryotic cells, maintaining their shape and protecting them from osmotic lysis.

View Gene Ontology (GO) Term

GO TERM SUMMARY
Name: cell wall part
Acc: GO:0044426
Aspect: Cellular Component
Desc: Any constituent part of the cell wall, the rigid or semi-rigid envelope lying outside the cell membrane of plant, fungal, and most prokaryotic cells, maintaining their shape and protecting them from osmotic lysis.
Proteins in PDR annotated with:
   This term: 0
   Term or descendants: 32 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0044426 - cell wall part (interactive image map)
YRC Informatics Platform - Version 3.0
Created and Maintained by: Michael Riffle