Iron-dependent degradation of IRP2 requires its C-terminal region and IRP structural integrity.

Abstract excerpt

BACKGROUND: Iron regulatory protein 2 (IRP2), a post-transcriptional regulator of cellular iron metabolism, undergoes iron-dependent degradation via the ubiquitin-proteasome pathway. A stretch of 73 amino acids within the N-terminal domain 1 of the protein was reported to function as an iron sensor. However, mutants lacking this fragment remain sensitive to degradation in iron-replete cells. RESULTS: To identify...

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