MS1 — Asparagus officinalis

Summary

A4U43_C03F4670, designated AoMS1 on asparagus chromosome 3, encodes a cobalamin-independent methionine synthase (EC 2.1.1.14) and is also annotated with ADP-glucose pyrophosphatase, ADP-ribose pyrophosphatase, and DNA-binding transcription factor activities. The gene is associated with de novo L-methionine biosynthesis, regulation of starch biosynthesis, DNA methylation-dependent heterochromatin assembly, and responses to ozone, insects, bacteria, and hypoxia. It has been linked to whole plant size, seed growth and development, root morphology, salt tolerance, and disease tolerance. Associations with male sterility, pollen exine development, and anther development have been noted. The protein localises to the chloroplast envelope, stroma, apoplast, plasmodesma, mitochondria, cytosol, and plasma membrane. Studies of related genes in other species link the family to chromatin silencing and plant defense activation.