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Naturally occurring protein crystals in the potato : inhibitor of papain, chymopapain, and ficin.

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Protein crystals isolated from potato tubers were found to consist of a proteinase inhibitor active against the cysteine proteinases papain, chymopapain, and ficin. The molecular weight as determined by gel filtration at pH 4.3 or by gel electrophoresis in the presence of dodecylsulfate was 80

Enzymatic generation of peptides from potato proteins by selected proteases and characterization of their structural properties.

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The use of low grade starting material for the generation of peptides with bioactivity properties is of interest. The proteins from the potato starch industry byproduct is a promising source, as several health benefits may be associated with their hydrolysates. The efficiency of selected proteases

Combining hexanoic acid plant priming with Bacillus thuringiensis insecticidal activity against Colorado potato beetle.

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Interaction between insect herbivores and host plants can be modulated by endogenous and exogenous compounds present in the source of food and might be successfully exploited in Colorado potato beetle (CPB) pest management. Feeding tests with CPB larvae reared on three solanaceous plants (potato,

Methyl Jasmonate Induces Papain Inhibitor(s) in Tomato Leaves.

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Leaves of 18- to 24-d-old tomato (Lycopersicon esculentum) plants exposed to gaseous methyl jasmonate (MJ) for 24 h at 30[deg]C in continuous light contained high levels of soluble protein that inhibited papain. Chromatographic analysis demonstrated that the active protein had a molecular mass of 80

Diverse enzymatic specificities of digestive proteases, 'intestains', enable Colorado potato beetle larvae to counteract the potato defence mechanism.

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In response to insect attack, high levels of proteinase inhibitors are synthesised in potato leaves. This can cause inefficient protein digestion in insects, leading to reduced growth, delayed development and lower fecundity. It has been suggested that Colorado potato beetle overcomes this defence

Inhibitors of cysteine proteinases from potato.

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Potato tubers contain considerable amounts of inhibitors of cysteine proteinases. The majority of inhibitory activity is due to low-molecular mass inhibitors differing in isoelectric points. Three of them were obtained in homogenous form, namely PCPIs (potato cysteine proteinase inhibitors) 6.6 (Mr

Complete genome sequence and analyses of the subgenomic RNAs of sweet potato chlorotic stunt virus reveal several new features for the genus Crinivirus.

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The complete nucleotide sequences of genomic RNA1 (9,407 nucleotides [nt]) and RNA2 (8,223 nt) of Sweet potato chlorotic stunt virus (SPCSV; genus Crinivirus, family Closteroviridae) were determined, revealing that SPCSV possesses the second largest identified positive-strand single-stranded RNA

Sweet potato cysteine proteases SPAE and SPCP2 participate in sporamin degradation during storage root sprouting.

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Sweet potato sporamins are trypsin inhibitors and exhibit strong resistance to digestion by pepsin, trypsin and chymotrypsin. In addition, they constitute the major storage proteins in the sweet potato and, after degradation, provide nitrogen as a nutrient for seedling regrowth in sprouting storage

Molecular characterization of a senescence-associated gene encoding cysteine proteinase and its gene expression during leaf senescence in sweet potato.

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The structure and expression of a senescence-associated gene (SPG31) encoding a cysteine proteinase precursor of sweet potato have been characterized. The coding region of the gene consists of two exons encoding an enzyme precursor of 341 amino acids with conserved catalytic amino acids of papain.

Functional comparison of homologous members of three groups of Kunitz-type enzyme inhibitors from potato tubers (Solanum tuberosum L.).

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For functional studies, nine cDNAs encoding Kunitz-type enzyme inhibitors from potato tubers were expressed as GST (glutathione S transferase)-tagged fusion proteins in the fission yeast Schizosaccharomyces pombe. The inhibitors represented the three major homology groups A, B and C found in tubers.

Potato tuber protein proteinase inhibitors belonging to the Kunitz soybean inhibitor family.

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Three protein inhibitors of proteolytic enzymes with molecular weights 21, 22, and 23 kD were isolated from potato tubers (Solanum tuberosum L.) by ammonium sulfate precipitation followed by gel and ion-exchange chromatography. The 21- and 22-kD proteins were shown to be serine proteinase inhibitors

A model of the C14-EPIC complex indicates hotspots for a protease-inhibitor arms race in the oomycete-potato interaction.

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The oomycete pathogen Phytophthora infestans secretes cystatin-like effector proteins (EPICs) that inhibit secreted host proteases during infection. We recently found that the C14 protease is a relevant target of EPICs and that this protease is under diversifying selection in wild potato species

Proteolysis of the 85-kilodalton crystalline cysteine proteinase inhibitor from potato releases functional cystatin domains.

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The protein crystals found in potato (Solanum tuberosum L.) tuber cells consist of a single 85-kD polypeptide. This polypeptide is an inhibitor of papain and other cysteine proteinases and is capable of binding several proteinase molecules simultaneously (P. Rodis, J.E. Hoff [1984] Plant Physiol 74:

Heterologous expression, purification, and properties of a potato protein inhibitor of serine proteinases.

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The gene PKPI-B10 [AF536175] encoding in potato (Solanum tuberosum L., cv. Istrinskii) a Kunitz-type protein inhibitor of proteinases (PKPI) has been cloned into the pET23a vector and then expressed in Escherichia coli. The recombinant protein PKPI-B10 obtained as inclusion bodies was denatured,

[Molecular cloning and expression of genes of Kunitz-type C protease inhibitors from potato].

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We cloned the products of polymerase chain reaction of the genome DNA of potato (Solanum tuberosum L., Istrinskii cultivar) and isolated 35 clones, which represent copies of eight genes encoding Kunitz type C proteases. Their nucleotide sequences were established. All the genes were found for the

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