background: lipopolysaccharides (lpss) and several antigenic proteins of brucella have been considered for preparation of diagnostic reagents and subunit vaccines. the objective of this study was to identify and compare immunogens of b. abortus s19 which induce humoral immune responses in human, goat and rabbit.   material and methods: the bacterial whole cell extract was prepared in extraction...

Snake venom is a complex mixture of proteins, peptides, enzymes, carbohydrates, and minerals. They contain a variety of chemicals with pharmacological and toxicological properties. The innate immune system is the first line of defense against toxins and microbes. Antibacterial and anticancer proteins produced by snake venom have recently attracted significant attention due to their relevance to...

The edible mushrooms (basidomycetes) have high nutritional value, promote the immune system, and as a source of natural antimicrobial substances have been used to cure bacterial infections since ancient times.Various kinds of proteins with several biological activities are produced by mushrooms. In this research, in order to evaluate antibacterial activity of edible mushrooms, we isolated prote...

the edible mushrooms (basidomycetes) have high nutritional value, promote the immune system, and as a source of natural antimicrobial substances have been used to cure bacterial infections since ancient times.various kinds of proteins with several biological activities are produced by mushrooms. in this research, in order to evaluate antibacterial activity of edible mushrooms, we isolated prote...

Across the world, many ice active bacteria utilize ice crystal controlling proteins for aid in freezing tolerance at subzero temperatures. Ice crystal controlling proteins include both antifreeze and ice nucleation proteins. Antifreeze proteins minimize freezing damage by inhibiting growth of large ice crystals, while ice nucleation proteins induce formation of embryonic ice crystals. Although ...

Surface-associated proteins play a key role in bacterial physiology and pathogenesis and are the major targets for vaccine development. Recent advances in defining the proteins associated with, and protruding out of, bacterial cells to a high level of accuracy are substantially contributing to accelerating the process of vaccine target identification and development.

soils bacteria are frequently faced with various adverse environmental conditions and have developed a complex regulatory network to respond rapidly to environmental changes. in this study usefulness and applicability of stress proteins of bacteria which are produced after stress conditions were examined. the adaptation of soil bacteria involves the induction of stress proteins provide a nonspe...

Bacteria and their associated bacteriophages are in a continuous battle, co-evolving defence, offence mechanisms. Bacterial xenogeneic silencers, H-NS family proteins, play important roles bacterial phage defence evolution by silencing incoming genes acquired through horizontal gene transfer. It is anticipated that the repression of these directly dependent on DNA binding modes proteins. protei...

protein secretory systems are found in all living organisms including gram negative bacteria, and eukaryotic cell’s organelles that are derived from these bacteria. unlike all other living organisms, gram negative bacteria have different protein secretory systems. at least there are four different independent secretory systems, which are responsible to transport the secreted proteins to the mil...