Nucleic Acids Research, 1989, Vol. 17, No. 19 7771-7778
© 1989
MOLECULAR BIOLOGY |
A cis-acting transcription element of the c-myc gene can assume an H-DNA conformation
Department of Human Genetics, Roswell Park Memorial Institute Elm and Carlton Streets, Buffalo, NY 14263, USA
Received June 26, 1989. Revised August 23, 1989. Accepted August 23, 1989.
I have used chemical probes and an oligonucleotide-association assay to determine the structure of a nuclease-sensitive, c-myc DNA region. I find that this DNA region can form a triplex-single stranded conformer in vitrothe H-DNA conformer. This DNA region has been shown previously to be a positive, cis-acting transcription element of the c-myc gene and to bind nuclear factors, including a base-paired ribonucleoprotein10. Therefore, H-DNA may be a functionally important in vivo topoisomer where the H-DNA and B-DNA conformers have different transcriptional activities.
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