MS1 — Asparagus officinalis

Summary

A4U43_C07F33400, designated AoMS1 on asparagus chromosome 7, encodes a 5-methyltetrahydropteroyltriglutamate--homocysteine S-methyltransferase (EC 2.1.1.14) with cobalamin-independent methionine synthase activity. The gene is associated with de novo L-methionine biosynthesis, the S-adenosyl-L-methionine cycle, and regulation of starch biosynthesis. It has been linked to whole plant size, seed growth and development, root morphology, and responses to oxidative stress, ozone, insects, bacteria, and hypoxia. Associations include male sterility, pollen exine development, anther development, chromatin silencing, defense activation, programmed cell death, reactive oxygen species accumulation, and indolic glucosinolate biosynthesis. The protein localises to the chloroplast envelope, stroma, apoplast, vacuole, Golgi, plasmodesmata, mitochondria, cytosol, and plasma membrane. Related genes in other species link the family to methionine levels, salt tolerance, seed germination, immunity, and pathogen resistance.