ATP4 — Brassica juncea

Summary

BJUB07G18100S (symbol ATP4) in Indian mustard (Brassica juncea) on chromosome B07 encodes a pentatricopeptide repeat (PPR) protein, containing PPR repeats and a TPR-like helical domain superfamily. The product binds pre-rRNA, single-stranded RNA, mRNA, and identical proteins, and is localized to the chloroplast stroma, mitochondria, and cytoplasm. It is associated with chloroplast RNA processing, group II intron splicing, mRNA stabilization, mRNA processing, and both positive regulation and regulation of translation. The gene has also been linked to cytoplasmic male sterility. Studies of related genes in other species connect the PPR family to similar RNA processing and fertility restoration functions.