ATP4 — Brassica juncea

Summary

BJUB05G45930S (ATP4) on Indian mustard chromosome B05 encodes a protein containing a Smr domain, PROP1-like PPR domain, PPR repeats, and TPR-like helical domain superfamily, with molecular functions including pre-rRNA binding, ssRNA binding, RNA binding, identical protein binding, mRNA binding, and zinc binding. It is associated with chloroplast RNA processing, group II intron splicing, mitochondrial mRNA modification, positive regulation of translation, mRNA stabilization, regulation of translation, and mRNA processing. The gene product localizes to the chloroplast stroma, mitochondria, and cytoplasm. ATP4 is associated with cytoplasmic male sterility. Related genes in other species, such as rice PPR5, OGR1, Rf1, CRP1, and PPR10, connect the family to similar RNA processing roles in organelles, though these associations are not yet established in Indian mustard.