Gpa2 — Solanum tuberosum

Summary

PGSC0003DMG400018502, symbol Gpa2 (also known as StXLG1, XLG2, XLG1, XLG3, StXLG2, StXLG3), on potato chromosome 8 encodes a protein with GproteinA_insert, Gprotein_alpha_su, and P-loop_NTPase domains, and has GTPase activity, GTP binding, and G protein-coupled receptor binding. It is associated with nematode resistance, particularly potato cyst nematode resistance, and disease resistance. The gene is associated with GPCR signaling pathway, gibberellin-mediated signaling, auxin transport, root morphogenesis, and reactive oxygen species metabolism. It localizes to the heterotrimeric G-protein complex, plasmalemma, cytoplasm, nucleus, and other compartments. Associations include flower diameter, petal length, seed weight, seed yield, leaf morphology, stomatal resistance, and responses to biotic stress, osmotic stress, high and low temperature, and oxidative stress. Studies of related genes in other species link the family to organ size, grain size, and stress tolerance.