The DNA damage-inducible dinD gene of Escherichia coli is equivalent to orfY upstream of pyrE.

The DNA damage-inducible gene dinD, originally identified by Kenyon and Walker (C. J. Kenyon and G. C. Walker, Proc. Natl. Acad. Sci. USA 77:2819-2823, 1980) by selection of the dinD::MudI (Ap lac) fusion, is shown here to be equivalent to the open reading frame orfY near pyrE. The evidence for identity between the two genes includes results from P1 transduction, Southern hybridization, and cloning and sequencing of the dinD fusion. No data were obtained that reveal any hints about the function of the dinD gene.