P-l,3-glucans

FoIynKr/p-l -Glucan Fig.28 Concept of in situ polymerization reaction utilizing j8-l,3-glucan as a vessel... 

CelIulose.-Most biologists know that cellulose (l->4-linked P-D-glucan) is a polysaccharide component of all primary and secondary cell walls. Indeed, plant cell walls are... 

IV. PARASITISM. Lysis by hydrolytic enzymes excreted by microorganisms is a well-known feature of mycoparasitism. Chitinase and P-l,3 glucanase (laminarase) are particularly important enzymes secreted by fungal mycoparasites capable of degrading the fungal cell wall components, chitin, and P-1,3 glucan (131-134). 

Figure 2 Effect of branch frequency on glucan conformation. Conformational characterization of glucans was carried out as described in the experimental section. Curdlan is a linear p(l-3)linked glucan Yeast glucan has a 30% P(l-6) branch frequency and PGG-R glucan has a 50% p(l-6) branch frequency. The Congo Red-single/triple helix complex absorption maxima are indicated.

Kiho, T., Katsuragawa, M., Nagai, K., Ugai, S. and Haga, M. (1992) Structure and antitumor activity of a branched (l-3)-p-D-glucan from the alkaline extract of Amanita muscaria. Carbohydr. Res. 224,237-243. 

Nakanishi, I., Kimura, K., Kusui, S., and Yamazaki, E. (1974). Complex formation of gel-forming bacterial (l,3)-P-D-glucans (curdlan-type polysaccharides) with dyes in aqueous solution. Carbohydr. Res. 32 47-52. 

Enzymes involved in rp endo- 3-l,4-glucanase, exo-P-l,4-cellobiohydrolase. Enzymes involved in r2 exo-P-l,4-cellobiohydrolase, exo-P-l,4-glucan glucohydrolase. Enzymes involved in r3 P-bludosidse or cellobiases. 

Hemicellulase Hydrolysis of P-l,4-glucans, a-L-arabinosides, P-D-mannosides, 1,3-P-D-xylans, and other polysaccharides, yielding polysaccharides of lower molecular weight. 

Pisum TLPs IFW16-1 Pisum sativum (pea) PM- p-l,3-Glucan ligands... 

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