ATR2 (AT5G46760) — Arabidopsis thaliana

Summary

AT5G46760 (ATR2/MYC3) on Arabidopsis thaliana chromosome 5 encodes a protein of the AIB/MYC-like family, with annotated activities including RNA polymerase II cis-regulatory region sequence-specific DNA binding, transcription corepressor and coactivator activity, and histidine phosphotransfer kinase activity. The gene is associated with regulation of glucosinolate biosynthetic process, tryptophan formation, UDP-glucose biosynthesis, chlorophyll a breakdown, seed growth, and trichome spacing. Observed phenotypes link it to herbivory resistance, resveratrol production, and ginsenoside biosynthesis. It localizes to the nucleus, plasmodesmata, and Golgi complex, and participates in jasmonate signaling pathways including COI1-JA-Ile conjugate binding and MYC-induced transcription of JA-responsive genes. The gene is also associated with traits such as grain size, seed protein content, anther length, root hair density, and responses to sulfur, potassium, and phosphorus.