Volume 270,
Number 39,
Issue of September 29, pp. 22665-22668, 1995
©1995 by The American Society for Biochemistry and Molecular Biology, Inc.
The
Interaction of TFIIIA with Specific RNA-DNA Heteroduplexes
(Received for publication, July 10,
1995; and in revised form, August 1, 1995)
Karl P.
Nightingale,
Alan P.
Wolffe
We examine the association of transcription factor TFIIIA with
RNA-DNA heteroduplexes containing sequences from the Xenopus
borealis 5 S rRNA gene. Under conditions where TFIIIA selectively
binds to 5 S rRNA or the internal control region of the 5 S rRNA gene,
no specific association of TFIIIA with DNA-RNA heteroduplexes
containing either strand of 5 S DNA could be detected. We discuss our
results with respect to specific models of TFIIIA recognition of the
internal control region and of DNA-RNA hybrids by zinc finger proteins.