Title : Iron-responsive degradation of iron-regulatory protein 1 does not require the Fe-S cluster.

Pub. Date : 2006 Feb 8

PMID : 16424901






8 Functional Relationships(s)
Download
Sentence
Compound Name
Protein Name
Organism
1 Iron-responsive degradation of iron-regulatory protein 1 does not require the Fe-S cluster. Iron aconitase 1 Mus musculus
2 The generally accepted role of iron-regulatory protein 1 (IRP1) in orchestrating the fate of iron-regulated mRNAs depends on the interconversion of its cytosolic aconitase and RNA-binding forms through assembly/disassembly of its Fe-S cluster, without altering protein abundance. Iron aconitase 1 Mus musculus
3 Here, we show that IRP1 protein abundance can be iron-regulated. Iron aconitase 1 Mus musculus
4 Modulation of IRP1 abundance by iron did not require assembly of the Fe-S cluster, since a mutant with all cluster-ligating cysteines mutated to serine underwent iron-induced protein degradation. Iron aconitase 1 Mus musculus
5 Modulation of IRP1 abundance by iron did not require assembly of the Fe-S cluster, since a mutant with all cluster-ligating cysteines mutated to serine underwent iron-induced protein degradation. Iron aconitase 1 Mus musculus
6 Phosphorylation of IRP1 at S138 favored the RNA-binding form and promoted iron-dependent degradation. Iron aconitase 1 Mus musculus
7 Our results reveal a mechanism for regulating IRP1 action relevant to the control of iron homeostasis during cell proliferation, inflammation, and in response to diseases altering cytosolic Fe-S cluster assembly or disassembly. Iron aconitase 1 Mus musculus
8 Our results reveal a mechanism for regulating IRP1 action relevant to the control of iron homeostasis during cell proliferation, inflammation, and in response to diseases altering cytosolic Fe-S cluster assembly or disassembly. Iron aconitase 1 Mus musculus