کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1927065 | 1536496 | 2007 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Regulation of the cysteine desulfurase Nfs1 and the scaffold protein IscU in macrophages stimulated with interferon-γ and lipopolysaccharide
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Regulation of the cysteine desulfurase Nfs1 and the scaffold protein IscU in macrophages stimulated with interferon-γ and lipopolysaccharide Regulation of the cysteine desulfurase Nfs1 and the scaffold protein IscU in macrophages stimulated with interferon-γ and lipopolysaccharide](/preview/png/1927065.png)
چکیده انگلیسی
Biogenesis of iron-sulfur (Fe-S) clusters in mammals involves a complex mitochondrial machinery that provides inorganic sulfide and iron for their assembly and insertion into apo-proteins. Mechanisms of Fe-S cluster assembly are just being unraveled, and regulation of the genes of this machinery remains unknown. In this study, we report that expression of two essential components of the Fe-S machinery, the cysteine desulfurase Nfs1 and its scaffold protein partner IscU, is down-regulated at both mRNA and protein levels when murine macrophages are physiologically stimulated with IFN-γ and LPS. Regulation did not rely on cluster disassembly or NO production because exposure of cells to exogenous sources of NO did not alter Nfs1 expression, while it converted cytosolic Fe-S aconitase into its apo-form and because macrophages from NOS2 deficient mice displayed Nfs1 down-regulation. While IFN-γ alone induced Nfs1 protein instability, LPS triggered a delayed decline of Nfs1, rather involving transcriptional events or mRNA instability. Also, the expression of IscU was down-regulated in IFN-γ- and/or LPS-stimulated macrophages independently of NO, pointing to a general mechanism for marshalling the regulation of the Fe-S cluster assembly machinery in macrophages exposed to inflammatory stimuli.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Archives of Biochemistry and Biophysics - Volume 465, Issue 1, 1 September 2007, Pages 282-292
Journal: Archives of Biochemistry and Biophysics - Volume 465, Issue 1, 1 September 2007, Pages 282-292
نویسندگان
Frédéric Canal, Cédric Fosset, Marie-Jeanne Chauveau, Jean-Claude Drapier, Cécile Bouton,