TTG — Arabidopsis thaliana

Summary

AT5G24520, known as TTG1 (TRANSPARENT TESTA GLABRA 1) in Arabidopsis thaliana, encodes a WD40 repeat-containing protein with DNA-binding transcription factor activity and protein kinase activity. It is associated with epidermal cell fate specification, trichome formation and spacing, root hair density, anthocyanin breakdown, flavonol metabolism, and regulation of proanthocyanidin anabolism. The gene has been connected to seed coat proportion and color, leaf trichome density, root epidermal cell length, brassinosteroid content and sensitivity, auxin content, iron concentration, water use efficiency, lignin content, stem elongation, and phototropism response. TTG1 is also linked to proteotoxic stress tolerance, abscisic acid sensitivity, phosphate starvation response, and interploidy hybrid viability. Studies of related genes in other species connect the family to fruit quality, flower color, and spine development.