PKI1 — Solanum tuberosum

Summary

PGSC0003DMG400010128 (PKI1) on potato chromosome 3 encodes a Kunitz-type protease inhibitor family protein, specifically annotated as KTI-B, with aspartic-type and serine-type endopeptidase inhibitor activity. The gene is associated with vacuolar localization and a range of carbohydrate-related processes, including starch metabolism, starch breakdown, starch anabolism, carbohydrate transport, and carbohydrate metabolism. It has also been linked to digestion, pollen tube growth, response to abscisic acid, and NO storage. Agronomically, PKI1 is associated with starch yield, starch content, sugar content, and protein content. Studies of related genes in other species further connect this gene family to protease inhibition.