GATA-type transcription repressor that regulates iron- acquisition genes through specific binding the GATA sequence elements of target promoters (PubMed:23980626). SRE1 targets repressed under iron-replete conditions include genes encoding a number of key iron-regulated factors such as those involved in siderophore biosynthesis NPS6, SIDA2 and ABC6, as well as the high-affinity iron permease FTR1, the catalase CAT1, and the superoxide dismutase SOD1 encoding genes (PubMed:23980626). The conserved cystein-rich region (CRR) localized between the zinc fingers is also involved in DNA-binding and transcription repressor activity (By similarity). Impairs the repression of siderophore biosynthesis and utilization genes in the presence of abundant iron and thus produces siderophores even under iron-replete conditions (PubMed:23980626).