TL1 — Arabidopsis thaliana

Summary

AT2G46790, also known as TL1, PRR9, or APRR9, encodes a pseudo-response regulator 9 in Arabidopsis thaliana. The protein contains a CCT domain and a CheY-like receiver domain, and exhibits DNA-binding transcription factor activity, phosphorelay response regulator activity, and protein homodimerization activity. PRR9 is associated with photoperiodism, shade avoidance, red/far-red light signaling, and de-etiolation. It is linked to the regulation of mRNA processing, TOR signaling, starch breakdown, and the TCA cycle. The gene is associated with numerous traits including photoperiod-sensitive flowering time, drought recovery, leaf area index, vegetative vigor, stem length, root number, and heterosis. Phenotypic associations include circadian rhythm and period, light sensitivity, leaf senescence, temperature response, cold stress tolerance, carotenoid and chlorophyll biosynthesis, mitochondrial homeostasis, and root thermomorphogenesis. PRR9 localizes to the nucleus, cytoplasm, and mitochondria.