Regulation of plant phototropic growth by NPH3/RPT2-like substrate phosphorylation and 14-3-3 binding

Abstract

The plasma membrane-localized NPH3 protein is required for phototropic growth in Arabidopsis. Here the authors show that phototropin 1 phosphorylates NPH3 at a conserved C-terminal sequence motif triggering binding of 14-3-3 proteins to NPH3 that is necessary for the phototropic response.