Distance that the lac repressor slides along chromosomal DNA when searching for its operator sequence

Value 45 base pairs Range: ±10 base pairs
Organism Bacteria Escherichia coli
Reference Hammar P et al. The lac Repressor Displays Facilitated Diffusion in Living Cells. Science. 2012 June 22 336(6088):1595-1598. doi: 10.1126/science.1221648 abstract, p.1598 right column bottom paragraph and middle column bottom paragraphPubMed ID22723426
Method P.1595 right column 2nd paragraph: "Using a yellow fluorescent protein–labeled LacI in Escherichia coli cells, [investigators] developed an assay for measuring the search time based on the distinction between localized and diffuse fluorescence signals (ref 14)."
Comments Abstract: "Here [investigators] show that the lac repressor slides 45±10 base pairs on chromosomal DNA and that sliding can be obstructed by other DNA-bound proteins near the operator." P.1598 right column bottom paragraph and middle column bottom paragraph: link
Entered by BC2333
ID 114239