Involved in the regulation of ethylene response (PubMed:18429939). Probable TREX-2 component required for nuclear RNA export. The TREX-2 complex (transcription and export complex 2) functions in docking export-competent ribonucleoprotein particles (mRNPs) to the nuclear entrance of the nuclear pore complex (nuclear basket). TREX-2 participates in mRNA export and accurate chromatin positioning in the nucleus by tethering genes to the nuclear periphery (PubMed:19843313). Interacts with EIN2 (via C-terminus). May also interact weakly with CSN8 (PubMed:18429939). Interacts with DSS1(V), AMPD, SAC3A, SAC3B and At5g61290 (AC Q9FLK4) (PubMed:19843313). Interacts with UCH1 (PubMed:19843313, PubMed:22951400) and UCH2 (PubMed:22951400). Interacts with NUP1, anchoring the TREX-2 complex on the nuclear pore complex (PubMed:19843313). Expressed at low levels in roots, leaves, stems and shoots (PubMed:18429939). Detected in seedlings, roots, leaves and anthers (PubMed:19843313). No visible phenotype, when grown in absence of ethylene. Extreme ethylene responsivness, when treated with saturating ethylene concentrations (PubMed:18429939). Curly leaf (PubMed:19843313).