Escherichia coli cells lacking methylation-blocking factor (leucine- responsive regulatory protein) have precise timing of initiation of DNA replication in the cell cycle

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Abstract

A protein that is required for specific methylation inhibition of two GATC sites in the papBA pilin promoter region, known as methylation-blocking factor (Mbf) and recently shown to be identical to the leucine-responsive regulatory protein (Lrp), is not responsible for the delayed methylation at oriC implicated in an eclipse period following initiation of DNA replication. Cells containing a transposon mutation within the mbf (lrp) gene initiate DNA replication at the correct time during the cell cycle, whereas cells with increased amounts of the Dam methyltransferase initiate DNA replication randomly throughout the cell cycle.

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Smith, D. W., Stine, W. B., Svitil, A. L., Bakker, A., & Zyskind, J. W. (1992). Escherichia coli cells lacking methylation-blocking factor (leucine- responsive regulatory protein) have precise timing of initiation of DNA replication in the cell cycle. Journal of Bacteriology. https://doi.org/10.1128/jb.174.9.3078-3082.1992

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