Sandbox Reserved 717: Difference between revisions
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== '''Description of Bacteriophage T4''' == | == '''Description of Bacteriophage T4''' == | ||
[[Image:T4_schema.jpg|thumb| | [[Image:T4_schema.jpg|thumb|left|Schematic representation of bacteriophage T4]] | ||
Bacteriophage T4 belongs to the Myoviridae family and the Caudovirales order because of its complex tail structure with a high number of proteins involved. It infects Escherichia coli bacteria. It is consisting of three parts : a DNA-containing head, a doubles-tubed tail with a contractile outer tail-sheath and a baseplate with long and short tail fibers. | Bacteriophage T4 belongs to the Myoviridae family and the Caudovirales order because of its complex tail structure with a high number of proteins involved. It infects Escherichia coli bacteria. It is consisting of three parts : a DNA-containing head, a doubles-tubed tail with a contractile outer tail-sheath and a baseplate with long and short tail fibers. | ||
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== '''Adsorption and penetration phases''' == | == '''Adsorption and penetration phases''' == | ||
[[Image:chgm form.jpg|thumb| | [[Image:chgm form.jpg|100px|thumb|right|Deployement of short tails]] | ||
First, the viral particles recognize and bind reversibly to the outer membrane protein C (OmpC) or the cell-surface lipopolysaccharide receptors thanks to six long tail fibers which are connected to the baseplate. After at least three long tail fibers have bound, the baseplate conformation changes: from a hexagon shape, it becomes a six-pointed star. This change can be the result of changing the interactions between proteins. | First, the viral particles recognize and bind reversibly to the outer membrane protein C (OmpC) or the cell-surface lipopolysaccharide receptors thanks to six long tail fibers which are connected to the baseplate. After at least three long tail fibers have bound, the baseplate conformation changes: from a hexagon shape, it becomes a six-pointed star. This change can be the result of changing the interactions between proteins. | ||
