General. Our research group studies the fundamental and applied aspects of molecular recognition in water. Through molecular design and organic synthesis, our group develops new functional polymer, peptide, lipid and nucleic acid assemblies to address problems in controlled chemical delivery. Though each research effort is grounded in organic synthesis, these synthetic systems are interrogated using biophysical, biochemical and cell culture methods.
Systems. Much of our current research centers
on the use of an unnatural triazine heterocycle, melamine, as an artificial base triple with U/U or T/T. When displayed multivalently, the melamine base engages with two Watson-Crick faces of thymine/uracil in DNA/RNA, resulting in the formation of triple-stranded hybrid structures. Synthetic triplex hybridizing molecules that utilize melamine as a base triple are in a family of molecules we call “bPNA” to represent bifacial [Peptide/Peptoid/Polymer] nucleic acid, according to the backbone used for melamine display. We have studied bPNAs as allosteric switches for aptamer binding and ribozyme catalysis, as well as packaging and targeting elements for siRNA delivery. Current research continues along these lines.
Congratulations to our new graduates, Chris DeSantis (PhD), Jie Mao (PhD) and Mr. Da’Sean Green (MSc)!
Welcome to our new postdoctoral researcher, Dr. Xueqiang Li!