SAP1 — Asparagus officinalis

Summary

A4U43_C07F33240, designated SAP1 in asparagus (Asparagus officinalis) on chromosome 7, encodes a stress-associated protein containing AN1 and A20 zinc-finger domains. The product exhibits microtubule binding, ubiquitin ligase activity, ubiquitin-protein transferase activity, transmembrane receptor protein serine/threonine kinase activity, DNA binding, zinc binding, and protein binding. This gene is associated with defense response to other organisms, phloem transport, leaf vascular tissue pattern formation, protein ubiquitination, cellular response to hypoxia, osmotic response, auxin and brassinosteroid signaling, and response to heat. It is linked to leaf vein morphology, brassinosteroid sensitivity, germination rate, osmotic stress tolerance, salt tolerance, flowering time, lateral root development, reduced root length, premature senescence with leaf cell death, abnormal leaf venation, and vascular development. The protein localizes to plasmodesmata, cytosol, plasmalemma, cytoplasm, and nucleus. Studies of related genes in other species connect the family to drought tolerance, disease resistance, and ABA sensitivity.