"Skinny" and "Fat" DNA: Two New Double Helices.Hoshika, S., Singh, I., Switzer, C., Molt Jr., R.W., Leal, N.A., Kim, M.J., Kim, M.S., Kim, H.J., Georgiadis, M.M., Benner, S.A.
(2018) J. Am. Chem. Soc. 140: 11655-11660
- PubMed: 30148365
- DOI: 10.1021/jacs.8b05042
- Primary Citation of Related Structures:
- PubMed Abstract:
According to the iconic model, the Watson-Crick double helix exploits nucleobase pairs that are both size complementary (big purines pair with small pyrimidines) and hydrogen bond complementary (hydrogen bond donors pair with hydrogen bond acceptors) ...
According to the iconic model, the Watson-Crick double helix exploits nucleobase pairs that are both size complementary (big purines pair with small pyrimidines) and hydrogen bond complementary (hydrogen bond donors pair with hydrogen bond acceptors). Using a synthetic biology strategy, we report here the discovery of two new DNA-like systems that appear to support molecular recognition with the same proficiency as standard Watson-Crick DNA. However, these both violate size complementarity (big pairs with small), retaining hydrogen bond complementarity (donors pair with acceptors) as their only specificity principle. They exclude mismatches as well as standard Watson-Crick DNA excludes mismatches. In crystal structures, these "skinny" and "fat" systems form the expected hydrogen bonds, while conferring novel minor groove properties to the resultant duplex regions of the DNA oligonucleotides. Further, computational tools, previously tested primarily on natural DNA, appear to work well for these two new molecular recognition systems, offering a validation of the power of modern computational biology. These new molecular recognition systems may have application in materials science and synthetic biology, and in developing our understanding of alternative ways that genetic information might be stored and transmitted.
Department of Biochemistry & Molecular Biology , Indiana University School of Medicine , Indianapolis , Indiana 46202 , United States.,ENSCO, Inc. , 4849 North Wickham Road , Melbourne , Florida 32940 , United States.,Firebird Biomolecular Sciences LLC , 13709 Progress Boulevard, Box 17 , Alachua , Florida 32615 , United States.,Department of Chemistry , University of California , Riverside , California 92521 , United States.,Foundation for Applied Molecular Evolution (FfAME) , 13709 Progress Boulevard, Box 7 , Alachua , Florida 32615 , United States.