Abstract
Autophagy is a fundamental homeostatic process in eukaryotic organisms, fulfilling essential roles in development and adaptation to stress. Among other factors, formation of autophagosomes critically depends on proteins of the Atg8 (autophagy-related protein 8) family, which are reversibly conjugated to membrane lipids. We have applied X-ray crystallography, nuclear magnetic resonance spectroscopy, and molecular dynamics simulations to study the conformational dynamics of Atg8-type proteins, using GATE-16 (Golgi-associated ATPase enhancer of 16 kDa), also known as GABARAPL2, as a model system. This combination of complementary approaches provides new insight into a structural transition centered on the C-terminus, which is crucial for the biological activity of these proteins.
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