PIN3 — Medicago truncatula

Summary

MTR_4G084870 (MtPIN3) on barrel medic chromosome 4 encodes an auxin efflux carrier, a member of the PIN-like family with auxin efflux transmembrane transporter activity, and also exhibits inositol-1,4-bisphosphate 1-phosphatase activity, phosphatidylinositol phosphate binding, and protein phosphatase regulator activity. The gene is associated with auxin export across the plasma membrane, basipetal auxin transport, tropism, regulation of shade avoidance, detection of oxidative stress, regulation of seed development, and pattern specification. It is linked to traits including gravity response, phototropism, root and shoot development, leaf and cotyledon morphology, flowering time, chlorophyll content, and responses to osmotic stress, ethylene, brassinosteroids, and low temperature. Localization evidence connects the product to the auxin efflux carrier complex, lateral and basal plasma membranes, and the PP2A complex.