PIN1 — Pisum sativum

Summary

PsPIN1 (PSAT7G003040) on garden pea chromosome 7LG7 encodes a PIN-like auxin efflux carrier with auxin efflux transmembrane transporter activity, inositol-1,4-bisphosphate 1-phosphatase activity, and phosphatidylinositol phosphate binding. It is associated with auxin signalling, acropetal auxin transport, regulation of cell polarization, endocytic recycling, and clathrin-mediated endocytosis. The gene is linked to seed development, regulation of seed size, reproductive structure development, and growth processes. Traits associated with PsPIN1 include gravity response, phototropism, shoot growth angle, lateral root number, root length, leaf vein morphology, seed set, stamen morphology, and responses to brassinosteroids, cytokinins, ethylene, and osmotic stress. It localizes to the auxin efflux carrier complex, recycling endosome, clathrin-coated vesicles, and basal plasma membrane. Studies of related genes in other species link the family to polar auxin transport, leaf vascular patterning, flower formation, root meristem growth, phototropism, and salt tolerance.