Investigating the Structure and Function of the Arf GEFs Gea1 and Gea2.
Investigating the Structure and Function of the Arf GEFs Gea1 and Gea2.
In eukaryotes, vesicle formation at the Golgi complex is initiated by the conserved small GTPase Arf1. In budding yeast, Arf1 localization and activity is controlled by three separate guanine nucleotide exchange factors (GEFs) Gea1, Gea2, and Sec7. Sec7 activates Arf1 at the trans‐Golgi network, and mechanisms regulating the activity and recruitment of Sec7 to the Golgi have been well characterized. For example, Sec7 is recruited to the TGN by four small GTPases including its substrate Arf1. However, Gea1 and Gea2, which activate Arf1 at earlier Golgi, do not share the same regulatory mechanisms as Sec7. While initially thought to be redundant paralogs, we have found that Gea1 and Gea2 localize to separate regions of the Golgi despite sharing common regulatory elements. As such, the purpose and mechanism for their differential localization remains unclear. I will present my work in trying to understand the role of Gea1 and Gea2 in the formation of retrograde vesicles and my advances in using Cryo‐EM to obtain a structure of these proteins.
- Cornell University United States
5 Research products, page 1 of 1
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