ATR2 — Cucumis sativus

Summary

CsATR2 (CSA_3G902270) on cucumber chromosome 3 encodes a bHLH transcription factor of the AIB/MYC-like family. The gene product is associated with bHLH transcription factor binding, transcription corepressor and coactivator activities, RNA polymerase II cis-regulatory region sequence-specific DNA binding, and SUMO transferase activity. CsATR2 is linked to induced systemic resistance, ethylene-mediated signaling, regulation of glucosinolate biosynthesis, defense response to insects, trichome spacing and papilla formation, seed maturation, and dehiscence. It is also associated with cellular response to sulfur starvation, ascorbate biosynthesis regulation, and retrograde response. Localization evidence places the product at the nuclear ubiquitin ligase complex, mediator complex, plasmodesmata, and Golgi. The gene participates in jasmonate signaling pathways including MYC-induced transcription of JA-induced genes and JAZ/MYC repressor complexes. Studies of related genes in other species link the family to chilling tolerance, drought tolerance, fruit quality, and resistance to Botrytis cinerea and bacterial pathogens.