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Updated: Aug 19, 2026

Direct Protein Delivery to Mammalian Cells Using Cell-permeable Cys2-His2 Zinc-finger Domains
Published on: March 25, 2015
Specific DNA-RNA hybrid binding by zinc finger proteins
1Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
Abstract:
Zinc finger proteins of the Cys2His2 type represent a large class of proteins that have been assumed to function by means of specific interactions with DNA. Experiments motivated by structural characteristics of zinc finger protein-DNA complexes revealed that certain zinc finger proteins bound DNA-RNA hybrids with affinities comparable to or greater than those for DNA duplexes. The interactions between the zinc finger proteins and the DNA-RNA hybrids were dependent on which strand was RNA and were sequence-specific. Thus, interactions with DNA-RNA hybrids should be considered with regard to the biological roles of zinc finger proteins.
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