Cellular regulation and molecular interactions of the ferritins |
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Authors: | K?J?Hintze Email author" target="_blank">E?C?TheilEmail author |
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Institution: | (1) Center for BioIron at CHORI (Children’s Hospital Oakland Research Institute, Children’s Hospital & Research Center at Oakland), 5700 Martin Luther King Jr. Way, Oakland, California 94609, USA;(2) Department of Nutritional Sciences and Toxicology, University of California, Berkeley, California, USA |
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Abstract: | Controlling iron/oxygen chemistry in biology depends on multiple genes, regulatory messenger RNA (mRNA) structures, signaling
pathways and protein catalysts. Ferritin, a protein nanocage around an iron/oxy mineral, centralizes the control. Complementary
DNA (antioxidant responsive element/Maf recognition element) and mRNA (iron responsive element) responses regulate ferritin
synthesis rates. Multiple iron-protein interactions control iron and oxygen substrate movement through the protein cage, from
dynamic gated pores to catalytic sites related to di-iron oxygenase cofactor sites. Maxi-ferritins concentrate iron for the
bio-synthesis of iron/heme proteins, trapping oxygen; bacterial mini-ferritins, DNA protection during starvation proteins,
reverse the substrate roles, destroying oxidants, trapping iron and protecting DNA. Ferritin is nature’s unique and conserved
approach to controlled, safe use of iron and oxygen, with protein synthesis in animals adjusted by dual, genetic DNA and mRNA
sequences that selectively respond to iron or oxidant signals and link ferritin to proteins of iron, oxygen and antioxidant
metabolism.
Received 25 June 2005; received after revision 17 October 2005; accepted 25 November 2005 |
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Keywords: | Iron oxygen mRNA regulation DNA regulation ferritin |
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