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Abstract: 1. An arabinogalactan-peptide from wheat endosperm was studied by using physicochemical techniques and some aspects of its chemical structure were determined. 2. The arabinogalactan-peptide is a non-associating, polydisperse macromolecule ([unk]=22000) which exhibits only minor non-ideal effects in aqueous solution. 3. Examination of the products of partial acid hydrolysis of the polysaccharide component showed that arabinose is present in the alpha-l-arabinofuranosyl configuration, and i.r.-absorption spectro… Show more

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Cited by 142 publications
(54 citation statements)
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References 49 publications
(60 reference statements)
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“…The amino acid composition suggests that no more than approximately 10% of the residues could possibly be glycosylated, which would mean that each branched oligosaccharide side chain contained on average a minimum 120 sugar residues. This would agree with estimates for side chain size in AGPs isolated from wheat endosperm (Fincher et al, 1974). From the dimensions of the imaged AGP, we can calculate a rough volume of 3000 nm 3 , which, if we assume a typical proteoglycan occupancy of maybe 30%, would predict a mol wt for each monomer imaged of just under 10 6 .…”
Section: Visualization and Spectroscopic Studies Of Agpsupporting
confidence: 69%
“…The amino acid composition suggests that no more than approximately 10% of the residues could possibly be glycosylated, which would mean that each branched oligosaccharide side chain contained on average a minimum 120 sugar residues. This would agree with estimates for side chain size in AGPs isolated from wheat endosperm (Fincher et al, 1974). From the dimensions of the imaged AGP, we can calculate a rough volume of 3000 nm 3 , which, if we assume a typical proteoglycan occupancy of maybe 30%, would predict a mol wt for each monomer imaged of just under 10 6 .…”
Section: Visualization and Spectroscopic Studies Of Agpsupporting
confidence: 69%
“…Several regulatory proteins have been shown to have important functions in cell signaling and recognition during plant development. Arabinogalactan proteins (AGPs) are an abundant and heterogeneous class of highly glycosylated Hyp-rich glycoproteins widely distributed in the plant kingdom (Fincher et al, 1974;Clarke et al, 1979;Kreuger and van Holst, 1996;SommerKnudsen et al, 1998;Gaspar et al, 2001;Showalter, 2001). The recent characterization of genes encoding different AGP backbones in several species gave rise to the current distinction between classical and nonclassical AGPs (Chen et al, 1994;Du et al, 1994;Mau et al, 1995;Knox, 1999).…”
Section: Introductionmentioning
confidence: 99%
“…Arabinogalactan proteins (AGPs) 3 are a family of complex proteoglycans widely distributed in plants (1,2). AGPs are also found in tree exudate gums and coniferous woods (3) and are characterized by the presence of large amounts of carbohydrate components rich in galactose (all the sugars in the present study are in the D-configuration unless otherwise specified) and L-arabinose and by protein components rich in hydroxyproline, serine, threonine, alanine, and glycine (4).…”
mentioning
confidence: 99%