CBL — Oryza sativa Japonica

Summary

OsCBL (Os06g0242600) in rice encodes a pyridoxal phosphate-dependent enzyme with cystathionine gamma-synthase, cysteine-S-conjugate β-lyase, mimosinase, and carbon-sulfur lyase activities, placing it in the CGS1/2 family of sulfur-amino-acid metabolism. The gene is associated with chloroplast stroma and cytoplasmic localization, and has been linked to transsulfuration, de novo L-methionine biosynthesis, selenium metabolism, raffinose anabolism, and protein storage. It is also associated with C4 photosynthesis, phytoalexin biosynthesis, auxin and sucrose metabolism, the TCA cycle, calcium signaling, virus-induced PTGS, hypersensitivity, detoxification, and nitrate response. Agronomically, OsCBL is associated with grain yield, cold and salt tolerance, lateral root and root length, and amino acid content. Studies of related genes in other species link the family to methionine accumulation, ethionine resistance, and tolerance to salt, cold, drought, osmotic, and heavy metal stresses.