Transcription regulator involved in iron deficiency response and tolerance. May regulate directly iron transporters or other transcription factors involved in iron-deficiency response. Binds specifically to the DNA sequence 5'-CATGC-3' of the IDE1 element found in the promoter of the barley iron deficiency-inducible gene IDS2. Expressed in roots. Up-regulated during the early stage of iron deficiency (at protein level). Polyubiquitinated (PubMed:27137867). Ubiquitination leads to its subsequent degradation via the proteasome pathway (PubMed:27137867).