EXPA4 — Solanum tuberosum

Summary

PGSC0003DMG400016650 (EXPA4) on potato chromosome 6 encodes an expansin protein, characterized by expansin and RlpA-like DPBB domains. This gene is associated with plant-type cell wall loosening and organization, as well as cell cycle, cell differentiation, and cell division processes. It is linked to hormone and starch anabolism, wax and starch metabolism, and responses to defense, thirst, and AOS. The encoded product localizes to the extracellular region and membrane. Associations with monosaccharide content and fruit firmness have also been noted. Studies of related expansin family members in other species, including EXP1, EXP2, EXP4, EXP5, EXP6, EXP7, EXP11, EXP12, and EXP21, further connect this family to cell wall modification and growth regulation.