Frontiers in Chemistry and Biochemistry Seminar: Prof. Jennifer Heemstra

MoSE 3201A and online at
Thursday, July 22, 2021 - 4:00pm to 5:00pm

A chemical biology toolbox for probing A-to-I RNA editing

 RNA undergoes extensive modification through enzymatic post-transcriptional editing events. Adenosine-to-inosine (A-to-I) editing is one of the most widespread and impactful of these modifications and is catalyzed by adenosine deaminases acting on RNA (ADARs). Resulting inosines base pair with cytosine, essentially re-coding adenosine sites to guanine. Editing is essential for a number of processes including embryogenesis, neurological function, and innate cellular immunity. Dysfunctional editing is also linked to auto-immune diseases, neurological disorders, and several types of cancer. Despite this importance, numerous challenges remain for studying A-to-I editing, and our overall understanding of the locations and frequency of inosine sites remains limited. To address this challenge, we have repurposed EndoV from an RNA-cleaving enzyme into an RNA-binding protein and demonstrated its use for mapping of A-to-I editing sites and global profiling of RNA inosine content in cells and tissue samples. We are also harnessing single-cell sequencing methods to quantify the cell-to-cell variability in A-to-I editing at key sites linked to cancer progression.

Contact Information: 
Host:  M.G. Finn
Map of Georgia Tech

School of Chemistry & Biochemistry

901 Atlantic Drive Atlanta, GA 30332-0400

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