The interaction of the Arabidopsis Xyloglucan Xylosyltransferases XXTs with the COPII member SAR1 via their di-Arginine motifs is critical for delivery to the Golgi.
Ning Zhang, Jordan D. Julian, Olga A. Zabotina
This study shows that Arabidopsis XXTs interact with SAR1 via di-arginine motifs for ER-to-Golgi transport, and mutations disrupt this interaction, causing mislocalization and reduced xyloglucan biosynthesis.
bioRxiv · Dec 31, 2025 · PreprintPlant Biology