SR1 — Nicotiana attenuata

Summary

A4A49_25547 (SR1, also known as CMTA5) in coyote tobacco (Nicotiana attenuata) encodes a protein with a CG-1 domain, ankyrin repeats and an IQ motif. It is a sequence-specific DNA-binding transcription factor and transcriptional co-regulator that also binds calmodulin. The gene is associated with cellular responses to aluminum, reactive oxygen species and hydrogen peroxide biosynthesis, cytokinin metabolism, exocytosis, pigmentation, anthocyanin regulation, pistil development, cold and freezing responses, and defense against insects. It has been linked to traits including total soluble sugar content, fruit quality, axillary bud morphology, brassinosteroid content, flowering time, seed size, root development, leaf senescence, and responses to high and low temperature stress. Studies of related CAMTA genes in other species connect the family to immunity, pathogen resistance, salt tolerance, freezing tolerance, and aluminum resistance.