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Jason R. Stagno, Ph.D.

Portait Photo of Jason Stagno
Structural Biophysics Laboratory
Staff Scientist
Center for Cancer Research
National Cancer Institute
Building 538, Room 167A
Frederick, MD 21702
Phone:  
301-846-6539
Fax:  
301-846-6231
E-Mail:  
jason.stagno@nih.gov

Biography

Dr. Stagno conducted his graduate work in molecular biology at the University of California, Irvine in the lab of Professor Hartmut (Hudel) Luecke. His research focused on structure determination by X-ray crystallography of terminal uridylyltransferases (TUTases) to study substrate specificity, catalysis, and their role in RNA editing in trypanosomes. In 2009, he received his Ph.D. and joined Dr. Xinhua Ji's group as a postdoctoral fellow in the Macromolecular Crystallography Lab at CCR. Here, his research focused on structure determination of protein-nucleic acid complexes involved in bacteriophage lambda transcription antitermination and RNA supercoiling. In 2012, Dr. Stagno became a Health Science Policy Analyst in the Office of Science Policy, Office of the Director, NIH, where he was involved in major science policy issues involving biosafety, biosecurity, and so-called dual use research of concern. In June 2014, he returned to CCR, joining Yun-Xing Wang's group as a staff scientist in the Structural Biophysics Laboratory.

Research

As a member of the Protein-Nucleic Acid Interaction (PNAI) Section, Dr. Stagno's research focuses on using structure-based approaches to understand key molecular interactions involving RNA in the regulation of gene expression. By combining various biophysical methods, including NMR, small-angle X-ray scattering (SAXS), and X-ray crystallography, the PNAI is currently investigating the molecular structures and key interactions of two RNA elements that are of great significance to public health. The first is the adenine riboswitch found in the 5'-UTR of mRNAs of many bacterial pathogens. This structured RNA element is essential for regulating gene expression in response to adenine as a metabolite. The second is the Rev response element (RRE), a large (~350 nt) RNA structure located in the env-coding region of the HIV-1 genome. The HIV-1 Rev protein binds to RRE in a highly specific manner, resulting in Rev oligomerization. Formation of this Rev-RRE complex facilitates nuclear export of unspliced and partially spliced mRNAs, which are essential for producing late-stage viral proteins and for providing genomes for budding virions. Because RRE is a unique feature of HIV-1 mRNA and is essential to the virus life-cycle, this RNA element may serve as an important molecular target for HIV-therapeutic design. In 2013, the PNAI determined the three-dimensional topological structure of RRE using SAXS. Although this structure was a major breakthrough in furthering our understanding of the Rev-RRE interaction, atomic resolution is needed to design molecules that specifically target the Rev binding sites on RRE. Toward this goal, Dr. Stagno is using X-ray crystallography to elucidate the structures of RRE-containing complexes.

This page was last updated on 7/10/2014.