VIH1 — Asparagus officinalis

Summary

A4U43_C03F15140 (AoVIH1) on asparagus chromosome 3 encodes a protein with inositol hexakisphosphate 1-kinase activity (EC 2.7.4.24), also annotated as PP-IP5 kinase and 5-diphosphoinositol pentakisphosphate 1-kinase, and binds ATP. The protein contains VIP1_N, His_Pase_VIP1, and Acid_Pase_AS domains. AoVIH1 is associated with inositol phosphate and inositol metabolism, upregulation of antifungal innate immune response, defence response to fungi, jasmonic acid/ethylene-dependent systemic resistance, upregulation of defense response to insects, upregulation of vitamin E anabolism, and GA and JA signaling. It is associated with jasmonate-dependent defense and phosphate homeostasis. The protein localises to the plastid, cytosol, plasmalemma, and cytoplasm. Related genes in other species link the family to inositol pyrophosphate synthesis, abiotic stress tolerance, abscisic acid stress response, and Agrobacterium-mediated plant transformation.