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Role of the amino-terminal domain of bacteriophage ø29 connector in DNA binding and packaging

AuthorsDonate, L. E.; Valpuesta, José M.; Rocher, Asunción ; Méndez Cormán, Enrique; Rojo, Fernando; Salas, Margarita ; Carrascosa, José L.
Issue Date1992
PublisherAmerican Society for Biochemistry and Molecular Biology
CitationJournal of Biological Chemistry 267: 10919-10924 (1992)
AbstractThe connector of bacteriophage phi 29 is required for prohead assembly, binds DNA, and drives DNA packaging into viral proheads. Limited proteolysis of the connector protein with endoproteinase Glu-C from Staphylococcus aureus V8 and chymotrypsin showed that a domain of the NH2-terminal region is involved in DNA binding and in the subsequent packaging into preformed proheads, but not in prohead assembly. Mutants in specific amino acids of the NH2-terminal domain, obtained by directed mutagenesis techniques, showed that the Ala1-Arg2-Lys3-Arg4 region of the connector is absolutely necessary for DNA packaging into the proheads as well as for efficient DNA binding.
Publisher version (URL)http://www.jbc.org/content/267/15/10919.full.pdf+html
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