CMPG2 — Solanum tuberosum

Summary

StCMPG2 (PGSC0003DMG400000791) on potato chromosome 4 encodes a U-box domain-containing protein with ubiquitin ligase activity, annotated as a transmembrane receptor protein serine/threonine kinase binding protein and assigned to EC 2.3.2.27. It belongs to the PUB22/23/24-like and ARM_PUB families. The gene is associated with the regulation of hormone anabolism, including auxin and brassinosteroid-mediated signalling, as well as the downregulation of programmed cell death and defense responses. It has been linked to arbuscular mycorrhizae formation, response to symbiotic bacteria, and regulation of long-day photoperiodism and flowering. Localisation evidence places the product in the nucleus, cytosol, plasmalemma, plasmodesma, and vacuole. Trait associations include drought tolerance, water use efficiency, stomatal resistance and opening, days to flowering, fruit size, and proline content. Related genes in other species link the family to pathogen resistance.