SIR — Phaseolus vulgaris

Summary

PHAVU_011G021800 (PvSIR) encodes a protein with ferredoxin-nitrite reductase activity and sulfite reductase (ferredoxin) activity, and binds 4Fe-4S clusters, heme, copper, and DNA. In French bean, PvSIR is associated with sulfate assimilation, nitrate assimilation, sulfide oxidation, response to nitrate and cold, plastid DNA packaging, DNA replication, and transcriptional regulation. The protein localizes to the chloroplast stroma, envelope, nucleoid, stromule, apoplast, and plasma membrane. PvSIR is linked to plant growth, development, assimilatory sulfate reduction, and oxidative stress tolerance. Studies of related genes in other species connect the SiR family to sulfite reduction, sulfite tolerance, leaf necrosis, chlorophyll content, protein content, and plant growth and development traits.