Arabinogalactan-proteins (AGPs) are highly glycosylated proteins (glycoproteins) found in the cell walls of plants. Each one consists of a protein with sugar molecules attached (which can account for more than 90% of the total mass). They are members of the wider class of hydroxyproline (Hyp)-rich cell wall glycoproteins, a large and diverse group of glycosylated wall proteins.
AGPs have been reported in a wide range of higher plants in seeds, roots, stems, leaves and inflorescences. AGPs account for only a small portion of the cell wall, usually no more than 1% of dry mass of the primary wall. They have also been reported in secretions of cell culture medium of root, leaf, endosperm and embryo tissues, and some exudate producing cell types such as stylar canal cells are capable of producing lavish amounts of AGPs. They are implicated in various aspects of plant growth and development, including root elongation, somatic embryogenesis, hormone responses, xylem differentiation, pollen tube growth and guidance, programmed cell death, cell expansion, salt tolerance, host-pathogen interactions, and cellular signaling.
AGPs have attracted considerable attention due to their highly complex structures and potential roles in signalling. In addition, they have industrial and health applications due to their chemical/physical properties (water-holding, adhesion and emulsification).
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Arabinogalactan-proteins (AGPs) are highly glycosylated proteins (glycoproteins) found in the cell walls of plants. Each one consists of a protein with...
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identified as covalently linked to carbohydrate moieties of the arabinogalactan-protein fraction. While gum arabic has been harvested in Arabia and West...
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polysaccharides, such as arabinogalactan, galactomannan, and cellulose, contributing to the tasteless flavor of green coffee. Arabinogalactan makes up to 17% of...
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shown that the nanoparticles are likely composed in large part of arabinogalactanproteins (AGPs), which exist in other plant adhesives as well. The matrix...
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their linkages, scientists have determined the presence of pectin, arabinogalactanproteins, xyloglucan, arabinan, and xylan, which are plant-specific polysaccharides...
identified to be covalently linked to carbohydrate moieties of the arabinogalactan-protein fraction of gum arabic. Diferulic acids are thought to have a structural...
peptidoglycan, arabinogalactan, and mycolic acid; a waxy outer mycomembrane of mycolic acid; and an outermost capsule of glucans and secreted proteins for virulence...
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(CmrA) to generate the mycolic acid; and Transfer of mycolic acids to arabinogalactan and other acceptors such as trehalose via the antigen 85 complex The...
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characteristic of gram-negatives, but has a significant peptidoglycan-arabinogalactan-mycolic acid wall structure which provides an external permeability...
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