MPP — Solanum tuberosum

Summary

PGSC0003DMG400028380, the potato MPP gene on chromosome 5, encodes a protein with domains characteristic of the MPP/UQCRC_Complex and peptidase M16 families, and is annotated as a metalloendopeptidase (EC 3.4.24.64) with quinol-cytochrome-c reductase, histone H3K9 acetyltransferase, and deacetylase activities. The protein localises to the mitochondrial processing peptidase complex, complex III, and mitochondrial membranes. MPP is associated with mitochondrial protein import, oxidative phosphorylation, cellular respiration, proteolysis, and electron transfer. It is also linked to chlorophyll and fatty acid anabolism, cell wall modification, defence response to bacteria, downregulation of defence, ethylene-mediated signalling, and responses to oxidative stress and salinity. Trait associations include osmotic and abscisic acid sensitivity, ethylene sensitivity, leaf composition, plant growth and development, salt tolerance, and a semi-dwarf phenotype with enhanced stress sensitivity and reduced electron transport. Related genes in other species link the family to salt and oxidative stress tolerance and mitochondrial redox status.