We have cloned part of the genes encoding two antigens of 71 and 72 Kd froi P. falciparua (1,2). These polypeptides differ in their cellular location, expression during the parasite's erythrocytic cycle , isoeletric point in bi-dimensiona 1 gel electrophoresis and reaction with rabbit immune sera (1-3). The sequence of the 72 Kd gene identified it as a member of the P. falciparua heat-shock fam...

Background: The Heat shock proteins are stress induced and there is increased evidence of presence of these chaperons extracellular which is considered to be intracellular. Their present cytokine like effect and help in immune recognition, thus indicate strong extracellular action of heat shock protein 70 in maintaining integrity of oral cavity. Hypothesis: The aim of this study was to evaluate...

Introduction: Increased oxidative stress is widely accepted to be a factor in the development and progression of Alzheimer’s disease. Triazine derivatives possess a wide range of pharmacological activities including anti-oxidative and anti-in.ammatory actions. In this study, we aimed to investigate the possible protective effect of 3-thioethyl-5,6-dimethoxyphenyl-1,2,4-triazine (TEDMT) on H2O2-...

Accumulated evidence shows that some phytochemicals provide beneficial effects for human health. Recently, a number of mechanistic studies have revealed that direct interactions between phytochemicals and functional proteins play significant roles in exhibiting their bioactivities. However, their binding selectivities to biological molecules are considered to be lower due to their small and sim...

In 1990, HSP40 was identified as a novel mammalian heat shock protein with molecular weight of approximately 40 kDa. Subsequent its partial amino acid sequence and cDNA cloning revealed that is homologue bacterial DnaJ protein. It has been found together HSP70 involved in the folding, protection denaturation promotion recovery heat-denatured also jointly inhibit formation aggregates characteris...

The grass family Poaceae includes annual species cultivated as major grain crops and perennial species cultivated as forage or turf grasses. Heat stress is a primary factor limiting growth and productivity of cool-season grass species and is becoming a more significant problem in the context of global warming. Plants have developed various mechanisms in heat-stress adaptation, including changes...

Cells may sense heat shock via the accumulation of thermally misfolded proteins. To explore this possibility, we determined the effect of protein misfolding on gene expression in the absence of temperature changes. The imino acid analog azetidine-2-carboxylic acid (AZC) is incorporated into protein competitively with proline and causes reduced thermal stability or misfolding. We found that addi...

Elevation of the incubation temperature of Chinook salmon embryo cells from 20 to 24 degrees C or exposure to heavy metals such as CdCl2 (5 microM) or ZnCl2 (100 to 500 microM) induces the reversible expression of a set of heat shock or stress proteins. Continuous exposure of the cells to either metal ions or heat shock results in recovery of protein synthesis to a control-like pattern. Treatme...

Skin is one of the main targets for reactive oxygen species; thus, reactive oxygen species-induced damage and protein and lipid modifications occur, and skin can undergo a wide array of diseases, from photosensitivity to cancer. In this study, human dermal fibroblasts exposed to hydrogen peroxide (0-1000 micromol/L) exhibited a marked increase in both protein carbonyls and 4-hydroxy-2-nonenal, ...

Eukaryotic translation initiation factor 2-alpha kinase (EIF2AK) proteins inhibit protein synthesis at translation initiation level, in response to various stress conditions, including oxidative stress, heme deficiency, osmotic shock, and heat shock. Origin and functional diversification of EIF2AK sequences remain ambiguous. Here we determine the origin and molecular evolution of EIF2AK protein...