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Ferrochelatase binds the iron-responsive element present in the erythroid 5-aminolevulinate synthase mRNA.

Ferrochelatase, the terminal enzyme of the heme biosynthetic pathway, binds an iron-responsive element (IRE) present in the 5'untranslated region of the mRNA for erythroid 5-aminolevulinate synthase, the first enzyme of the heme biosynthetic pathway. This IRE-binding activity of ferrochelatase may play a critical role in the regulation of heme biosynthesis in differentiating erythrocytes.