AS1 — Asparagus officinalis

Summary

A4U43_C07F6930 (AoAS1) on asparagus chromosome 7 encodes an asparagine synthase (glutamine-hydrolyzing) (EC 6.3.5.4), an enzyme with an AsnB_N domain and GATase_2 domain. The gene is associated with L-asparagine anabolism, amino acid breakdown, and cellular responses to sucrose starvation, glucose, fructose, and sucrose. It is linked to fruit abscission and development, abscission, response to absence of light, stress response, NO storage, and translation initiation, with the protein localizing to the cytosol and cytoplasm. AoAS1 is associated with nitrogen-limiting stress tolerance, nitrogen metabolism and reutilization, phosphate starvation tolerance, leaf senescence, salt stress response, and asparagine biosynthesis. Studies of related genes in other species link the family to seed nitrogen content, acrylamide formation, and traits including leaf weight, seed protein content, nitrate content, and root length.