Polysaccharides biogenesis

Inositol and Plant Cell Wall Polysaccharide Biogenesis... 

Inositol and plant cell wall polysaccharide biogenesis 23... 

G. O. AspiuaU, iu F. Loewus ed.. Biogenesis of Plant Cell Wall Polysaccharides, Academic Press, Inc., New York, 1973. 

Brown, R. M., Herth, W., Franke, W. W., Romanovicz, D. The role of the Golgi apparatus in the biosynthesis and secretion of a cellulosic glycoprotein in Pleurochrysis a model system for the synthesis of structural polysaccharides. In Biogenesis of plant cell wall polysaccharides, pp. 207. Loewus, F. (ed.). New York Academic Press 1973... 

There is at present no precise information concerning either the control mechanisms that govern wall-biogenesis or the interactions between wall biogenetic-processes and general cellular metabolism. The number of steps involved in the formation of a polysaccharide from a glycosyl-nucleotide is not known, and it is not clear how cellular control is extended beyond the plasma membrane, or how the cell wall is formed from the component polymers. Thus, it appears that the major questions posed by the problem of cell-wall biosynthesis have yet to be answered (see also, Ref. 217). 

Loewus, F., and Labarca, C. 1973. In Biogenesis of the Plant Cell Wall Polysaccharides (F. Loewus, ed.) pp. 175-193. Academic Press, New York. 

Dickinson, D.B., Hopper, J.E., and Davies, M.D., 1973, A study of pollen enzymes involved in sugar nucleotide formation. In Loewus, F. (ed.), Biogenesis of Plant Cell Wall Polysaccharides. Academic Press, NY, pp. 29 48. 

The )8-(1 2)- and a-(1 5)-linked arabinose residues are incorporated into the polymer from the activated polyprenyl sugar phosphate 10, which is in turn synthesized from glucose via 5-phosphoribose pyrophosphate (pRpp) [46-48]. Elongation of the polymer chain is believed to involve a family of arabinosyltransferases (AraT s) that recognize both 10 and arabinofuranoside-based acceptors of differing structures (Fig. 5) [18,19,49,50]. In AG biosynthesis, the entire polysaccharide appears to be assembled as a polyprenol diphosphate intermediate, which is transferred to peptidoglycan prior to the addition of the mycolate esters [18]. In LAM biogenesis, the arabinan portion is believed to be synthesized as a polyprenol phosphate that is transferred to lipomannan [51]. 

This chapter will review the current mechanisms strictly operating in the biogenesis of the 0-specific EPS. More comprehensive information on the biosynthesis and assembly of other EPS components and capsular polysaccharides can be found in recent reviews. ... 

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