BP19 — Solanum tuberosum

Summary

PGSC0003DMG400005208, also known as StPME4 or BP19, is a potato gene on chromosome 1 that encodes a pectinesterase with both pectinesterase activity (EC 3.1.1.11) and pectinesterase inhibitor activity. The protein contains pectinesterase catalytic and inhibitor domains, as well as an invertase/methylesterase inhibitor domain. StPME4 is associated with pectin anabolism, phloem loading, protein methylation, and regulation of enzyme activity. The gene product localizes to the pollen tube. StPME4 has been linked to starch yield and content, drought tolerance and sensitivity, plant height, flower color, and rhizome formation.