BYU

Abstract by Alexandra Thornock

Personal Infomation


Presenter's Name

Alexandra Thornock

Co-Presenters

None

Degree Level

Undergraduate

Co-Authors

None

Abstract Infomation


Department

Chemistry and Biochemistry

Faculty Advisor

Joshua Andersen

Title

Interaction of ATG9A with the ULK1 Complex in Autophagy

Abstract

When a cell undergoes stress, autophagy, a “self-eating” metabolic pathway, is initiated and an autophagosome (a structure that envelops cell membrane) forms and fuses with the lysosome to degrade its contents and create energy. ATG9A is a transmembrane protein that carries structural membrane to the PAS (phagophore assembly site, the site of autophagosome initiation). Phosphorylation of ATG9A, dependent on interaction with ULK1 complex, is required for its trafficking to the PAS. ATG13 was thought to mediate the interaction between ATG9A and the ULK1 complex. However, our recent ATG13 knock-out experiments suggest that ATG9A interacts with ATG13 and ULK1 independently of each other, suggesting that ATG13 and ULK1 are in different locations in the cell. I have been using bimolecular fluorescence complementation (BiFC) to study the dimerization of ATG9A. Understanding which terminus of ATG9A is most active in dimerization will help to identify which is the mechanistic “business end” for interaction with specific proteins of the ULK1 complex.