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Correlation between the conformation of Escherichia coli −10 hexamer sequences and promoter strength: use of orthophenanthroline cuprous complex as a structural index.
Author(s) -
Spassky A.,
Rimsky S.,
Buc H.,
Busby S.
Publication year - 1988
Publication title -
the embo journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.484
H-Index - 392
eISSN - 1460-2075
pISSN - 0261-4189
DOI - 10.1002/j.1460-2075.1988.tb03020.x
Subject(s) - random hexamer , biology , escherichia coli , genetics , correlation , index (typography) , escherichia coli proteins , computational biology , gene , microbiology and biotechnology , geometry , mathematics , world wide web , computer science
The lac and gal control regions contain two functional overlapping promoters P1 and P2. Point mutations can shift transcription from P1 to P2 and vice versa. We show that the reactivity of DNA fragments towards nucleolytic attack with orthophenanthroline cuprous complex can be used to predict which promoter competes more efficiently for RNA polymerase binding. Furthermore, similar changes in reactivity are observed as closed complexes isomerize to form the final open complexes, provided that the functional start is taken as a reference. We found a correlation between the reactivity pattern of −10 regions in uncomplexed DNA and the rate of open complex formation.