PPI1 — Pisum sativum

Summary

PSAT3G083600 (symbol PPI1, also known as TOC34) on chromosome 3LG5 encodes a protein with GTP binding and GTPase activity, a member of the GIMA/IAN/Toc family, and is associated with chloroplast targeting sequence receptor activity and voltage-gated monoatomic cation channel activity. The protein localises to the chloroplast outer membrane as part of the Toc and Tic complexes. PPI1 is associated with protein import into chloroplasts, chloroplast development, and the transition from vegetative to reproductive phase. It is linked to numerous agronomically relevant traits including chlorophyll content, photosynthetic ability, drought tolerance, seed viability, flowering time, plant growth and development, disease tolerance, and responses to abscisic acid, cold, and osmotic stress. Studies of related genes in other species link the family to plastid protein import and plastid development.