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Biochemistry

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City University of New York (CUNY)

Theses/Dissertations

2014

Iron

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Iron Regulates Mrna Translation Initiation Through Rna Iron Responsive Element (Ire), Jia Ma Feb 2014

Iron Regulates Mrna Translation Initiation Through Rna Iron Responsive Element (Ire), Jia Ma

Dissertations, Theses, and Capstone Projects

The non-coding IRE-RNA structure, a 30 nt stem loop structure, regulates synthesis of proteins in iron trafficking, cell cycling, and nervous system function. IRE-RNA binding with iron regulatory protein (IRP) proteins inhibits ribosome accessing mRNA. Increasing iron concentration decreases IRP binding with IRE-RNA. Previous models of IRE-mRNA translation regulation concentrate on Fe-S binding to IRP and IRP degradation after release from IRE-RNA. These models lack information on the details of decreasing IRE-RNA/IRP protein binding with iron concentration elevation. This research shows 1. Eukaryotic initiation factor 4F (eIF4F) binds to IRE-RNA with high affinity and works as a positive control element …