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The phage tail-like tubule of the T6SS assembles on a structure analogous to bacteriophage baseplates. It consists of the proteins TssE, TssF, TssG, and TssK. The baseplate and phage tail-like complex interact in the bacterial cytoplasm, and then are recruited to the cell envelope by the membrane complex. [10]
Structural model at atomic resolution of bacteriophage T4 [1] The structure of a typical myovirus bacteriophage Anatomy and infection cycle of bacteriophage T4. A bacteriophage (/ b æ k ˈ t ɪər i oʊ f eɪ dʒ /), also known informally as a phage (/ ˈ f eɪ dʒ /), is a virus that infects and replicates within bacteria and archaea.
The tape measure protein gp29 is present in the baseplate-tail tube complexes, but it could not be modeled. [12] During assembly of the bacteriophage (phage) T4 virion, the morphogenetic proteins encoded by the phage genes interact with each other in a characteristic sequence.
The functions of the capsid are to: protect the genome, deliver the genome, and; interact with the host. The virus must assemble a stable, protective protein shell to protect the genome from lethal chemical and physical agents. These include extremes of pH or temperature and proteolytic and nucleolytic enzymes. For non-enveloped viruses, the ...
The tailspike protein (P22TSP) of Enterobacteria phage P22 mediates the recognition and adhesion between the bacteriophage and the surface of Salmonella enterica cells. It is anchored within the viral coat and recognizes the O-antigen portion of the lipopolysaccharide (LPS) on the outer-membrane of Gram-negative bacteria .
structure summary In molecular biology , a phage major coat protein is an alpha-helical protein that forms a viral envelope of filamentous bacteriophages . These bacteriophages are flexible rods, about one to two micrometres long and six nm in diameter, with a helical shell of protein subunits surrounding a DNA core.
In molecular biology, bacteriophage scaffolding proteins are proteins involved in bacteriophage assembly. The assembly of a macromolecular structure proceeds via a specific pathway of ordered events and involves conformational changes in the proteins as they join the assembly. The assembly process is aided by scaffolding proteins, which act as ...
P1 is a temperate bacteriophage that infects Escherichia coli and some other bacteria. When undergoing a lysogenic cycle the phage genome exists as a plasmid in the bacterium [1] unlike other phages (e.g. the lambda phage) that integrate into the host DNA. P1 has an icosahedral head containing the DNA attached to a contractile tail with six ...