The N-terminus of alpha-1 giardin, a parasitic annexin orthologue, is essential for oligomerization and lipid-binding activity.

The N-terminus of alpha-1 giardin is essential for oligomerization and lipid-binding activity in Giardia lamblia.

• Why it matters: Understanding annexin functions in Giardia lamblia is important because they are involved in membrane processes and may influence parasite virulence and vaccine development.
• What they did: Researchers used site-directed mutagenesis, confocal microscopy, mass photometry, lipid-binding assays, XL-MS, structural modeling, and molecular dynamics simulations to analyze alpha-1 giardin, focusing on its N-terminal region.
• The result: Findings show that the short N-terminal region of alpha-1 giardin is critical for its oligomerization and membrane association, providing insights into annexin-mediated processes and potential targets for intervention.