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The purification and properties of the lectin from potato tubers, a hydroxyproline-containing glycoprotein.

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1. Potato lectin has been purified and shown to be a glycoprotein containing about 50% of carbohydrate. Most of the sugar residues (92%) are arabinose; small amounts of galactose, glucose and glucosamine are also present. 2. The most abundant amino acid is hydroxyproline (16% of the residues), 11.5%

Potato lectin: a three-domain glycoprotein with novel hydroxyproline-containing sequences and sequence similarities to wheat-germ agglutinin.

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Potato (Solanum tuberosum) tuber lectin is a chitin-binding, hydroxyproline-rich glycoprotein, which may be involved in the defence mechanism of the plant. We had previously obtained evidence that it consists of at least two very dissimilar domains. The aim was to use a combination of accurate

Extensin from suspension-cultured potato cells: a hydroxyproline-rich glycoprotein, devoid of agglutinin activity.

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Enhanced deposition and cross-linking of hydroxyproline-rich glycoproteins (HRGPs) in the plant cell wall is acknowledged to contribute to the formation of a resistant barrier against pathogen infection. We have isolated, from suspension-cultured potato (Solanum tuberosum L. cv. Desiree) cells, two

Hydroxyproline-rich bacterial agglutinin from potato : extraction, purification, and characterization.

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A protein, extracted from Katahdin potato (Solanum tuberosum L. cv ;Katahdin') tubers and purified by ion exchange chromatography and gel filtration, agglutinates avirulent strains of the bacterial wilt pathogen, Pseudomonas solanacearum, but only weakly agglutinates virulent strains. The agglutinin

Hydroxyproline-rich glycopeptide signals in potato elicit signalling associated with defense against insects and pathogens.

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HypSys peptides are 18-20 amino acids glycopeptide defense signal first discovered in tobacco and tomato that activate expression of defensive genes against insect-herbivores. Discovery of their orthologs in other Solanaceaous and nonsolanaceous plants demonstrated their possible ubiquitous nature

The location of arabinosyl:hydroxyproline transferase in the membrane system of potato tissue culture cells.

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Incubation of a particulate preparation from potato tissue culture cells with UDP-beta-L-[1-3H] arabinose yielded a glycoprotein fraction containing labelled material with the characteristics of hydroxyproline arabinosides. The sugar-protein linkage was resistant to hot alkaline hydrolysis, and the

Properties of potato lectin and the nature of its glycoprotein linkages.

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1. Potato lectin is a glycoprotein that contains about 47% (by weight) l-arabinose, 3% d-galactose and 11% hydroxyproline. It has a monomeric molecular weight of about 50000 and probably exists as a monomer-dimer system in aqueous solution, with the monomer predominating. It has a very high

Analysis of the Components Released from Potato Tuber Tissues during Maceration by Pectolytic Enzymes.

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Endo-pectin lyase and endo-polygalacturonase of Aspergillus japonicus attack the middle lamella of plant tissue and cause tissue maceration. Galacturonides, neutral sugars, and proteins were released from potato tuber tissues during maceration by both purified enzymes. These three components

A second extensin-like hydroxyproline-rich glycoprotein from carrot cell walls.

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The insoluble extensin matrix of dicot cell walls has been studied most fruitfully by examining the salt-extractable precursors to this matrix. Multiple extensin-like hydroxyproline-rich glycoproteins (HRGPs) have been isolated, or their existence inferred, from tomato, potato, bean, soybean, melon,

Signal transduction and regulation of IbpreproHypSys in sweet potato.

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Hydroxyproline-rich glycopeptides (HypSys) are small signalling peptides containing 18-20 amino acids. The expression of IbpreproHypSys, encoding the precursor of IbHypSys, was induced in sweet potato (Ipomoea batatas cv. Tainung 57) through wounding and IbHypSys treatments by using jasmonate and H2

Structural characterization and hypoglycemic effects of arabinogalactan-protein from the tuberous cortex of the white-skinned sweet potato (Ipomoea batatas L.).

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An arabinogalactan-protein (WSSP-AGP) was isolated from the tuberous cortex of the white-skinned sweet potato (WSSP; Ipomoea batatas L.). It consists of 95% (w/w) carbohydrate and 5% (w/w) protein with high contents of hydroxyproline, alanine, and serine. Its sugar composition is

Structural studies of the carbohydrate moieties of lectins from potato (Solanum tuberosum) tubers and thorn-apple (Datura stramonium) seeds.

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1. Methylation analysis of potato (Solanum tuberosum) lectin and thorn-apple (Datura stramonium) lectin confirmed previous conclusions that both glycoproteins contained high proportions of l-arabinofuranosides and lesser amounts of d-galactopyranosides. The arabinofuranosides are present in both

First Report of Potato Scab Caused by Streptomyces turgidiscabies in China.

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Potato scab, caused by several plant pathogenic Streptomyces species, is known to occur in potato-planting areas worldwide. Symptoms of disease on potato tubers are shallow, raised, or pitted corky lesions (2). In 1998, Streptomyces turgidiscabies was reported as a new potato scab pathogen from

Systemin, hydroxyproline-rich systemin and the induction of protease inhibitors.

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Systemin, an 18-amino acid signaling peptide isolated from tomato leaves, has been found to be an integral component of the jasmine acid signaling pathway, leading to the synthesis of protease inhibitors (PIs). The discovery of systemin has led to a search for other peptide signals involved in

Potato lectin: a modular protein sharing sequence similarities with the extensin family, the hevein lectin family, and snake venom disintegrins (platelet aggregation inhibitors).

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Potato (Solanum tuberosum) lectin, is a chimeric chitin-binding protein comprised of a lectin domain fused to a hydroxyproline-rich glycoprotein domain. Here peptide sequence information from both domains is presented. A partial sequence of a major tryptic peptide T2:

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