Methylation-dependent DNA synthesis in Escherichia coli mediated by DNA polymerase I.
An in vitro system was used to study DNA synthesis in lysates of Escherichia coli cells which had been grown in the presence of ethionine. Such lysates showed a reduced capacity to incorporate [3H]TTP into high-molecular-weight material. Activity could be restored by incubation with S-adenosyl methionine and ATP. S-adenosyl methionine-reactivated TTP incorporation required the presence of DNA polymerase I, ATP, and all four deoxyribonucleotide triphosphates. DNA polymerase III was not required.
11 references, click to expand
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