arachis magna/tyrosine

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Gatekeeper tyrosine phosphorylation is autoinhibitory for Symbiosis Receptor Kinase.

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Plant receptor-like kinases (RLKs) are distinguished by having a tyrosine in the 'gatekeeper' position. Previously we reported Symbiosis Receptor Kinase from Arachis hypogaea (AhSYMRK) to autophosphorylate on the gatekeeper tyrosine (Y670), though this phosphorylation was not necessary for the

Autophosphorylation of gatekeeper tyrosine by symbiosis receptor kinase.

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Plant receptor-like kinases (RLKs) share their evolutionary origin with animal interleukin-1 receptor-associated kinase (IRAK)/Pelle family of soluble kinases and are distinguished by having tyrosine as 'gatekeeper'. This position is adjacent to the hinge region and is hidden in a hydrophobic pocket

Mutational analysis of stress-responsive peanut dual specificity protein kinase. Identification of tyrosine residues involved in regulation of protein kinase activity.

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We recently reported that Arachis hypogaea serine/threonine/tyrosine (STY) protein kinase is developmentally regulated and is induced by abiotic stresses (Rudrabhatla, P., and Rajasekharan, R. (2002) Plant Physiol. 130, 380-390). Other than MAPKs, the site of tyrosine phosphorylation has not been

In vitro screening for protein tyrosine phosphatase 1B and dipeptidyl peptidase IV inhibitors from selected Nigerian medicinal plants.

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OBJECTIVE Protein tyrosine phosphatase 1B (PTP 1B) and dipeptidyl peptidase IV (DPP IV) have been identified as one of the drug targets for the treatment of Type-2 diabetes. This study was designed to screen for PTP 1B and DPP-IV inhibitors from some Nigerian medicinal plants. METHODS PTP 1B and

Serine/threonine/tyrosine protein kinase phosphorylates oleosin, a regulator of lipid metabolic functions.

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Plant oils are stored in oleosomes or oil bodies, which are surrounded by a monolayer of phospholipids embedded with oleosin proteins that stabilize the structure. Recently, a structural protein, Oleosin3 (OLE3), was shown to exhibit both monoacylglycerol acyltransferase and phospholipase A(2)

Production of resveratrol from tyrosine in metabolically engineered Saccharomyces cerevisiae.

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Resveratrol, a polyphenol compound found in grape skins, has been proposed to account for the beneficial effects of red wine against heart disease. To produce resveratrol in Saccharomyces cerevisiae, four heterologous genes were introduced: the phenylalanine ammonia lyase gene from Rhodosporidium

Circular dichroism studies on the effects of sodium dodecyl sulfate on the conformation of some phytohemagglutinins.

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Conformation and conformational transitions of phytohemagglutinins (lectins) from Arachis hypogaea (peanut), Lens culinaris (lentil), Glycine max (soybean), and Ricinus communis (castor bean) were studied by the circular dichroism probe. The lectins were found to possess a high amount of the pleated

Galectin-1-mediated cell adhesion, invasion and cell death in human anaplastic large cell lymphoma: regulatory roles of cell surface glycans.

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Galectin-1 is known to be one of the extracellular matrix proteins. To elucidate the biological roles of galectin-1 in cell adhesion and invasion of human anaplastic large cell lymphoma, we performed cell adhesion and invasion assays using the anaplastic large cell lymphoma cell line H-ALCL, which

Involvement of a tyrosyl residue in the interaction of peanut lectin with lactose.

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The role of a tyrosyl residue in the binding of Arachis hypogaea (peanut) agglutinin, AHA, to lactose has been studied using two techniques, titration of the phenolic hydroxyl group of the tyrosine residue and chemical modification of the tyrosine with iodine. More than three tyrosyl residues per

Evaluation of correct endogenous reactive oxygen species content for human sperm capacitation and involvement of the NADPH oxidase system.

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BACKGROUND Generation of controlled amounts of reactive oxygen species (ROS) and phosphorylation of protein tyrosine residues (Tyr) are two closely related changes involved in sperm capacitation. This study investigated the effect of altered endogenous ROS production on Tyr-phosphorylation (Tyr-P),

Biosynthesis of plant-specific phenylpropanoids by construction of an artificial biosynthetic pathway in Escherichia coli.

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Biological synthesis of plant secondary metabolites has attracted increasing attention due to their proven or assumed beneficial properties and health-promoting effects. Phenylpropanoids are the precursors to a range of important plant metabolites such as the secondary metabolites belonging to the

Biosynthesis of plant-specific stilbene polyketides in metabolically engineered Escherichia coli.

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BACKGROUND Phenylpropanoids are the precursors to a range of important plant metabolites such as the cell wall constituent lignin and the secondary metabolites belonging to the flavonoid/stilbene class of compounds. The latter class of plant natural products has been shown to function in a wide

Engineering of a microbial coculture of Escherichia coli strains for the biosynthesis of resveratrol.

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BACKGROUND Resveratrol is a plant natural product with many health-protecting effects which makes it an attractive chemical both for academic studies and industrial purposes. However, the low quantities naturally produced by plants as well as the unsustainable procedures of extraction, purification

In vitro capacitation and acrosome reaction of dog spermatozoa can be feasibly attained in a defined medium without glucose.

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Incubation of dog spermatozoa in a medium without glucose and in the presence of lactate and pyruvate (l-CCM) for 4 h at 38.5 degrees C in a 5% CO(2) atmosphere induced in vitro capacitation of these cells. This was verified after the combined specific capacitation-like changes in percentages of

Developmentally regulated dual-specificity kinase from peanut that is induced by abiotic stresses.

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Tyrosine (Tyr) phosphorylation represents an important biochemical mechanism to regulate many cellular processes. No Tyr kinase has been cloned so far in plants. Dual-specificity kinases are reported in plants and the function of these kinases remains unknown. A 1.7-kb cDNA that encodes

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