کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10765959 | 1050618 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Liver-specific enhancer in ABCC6 promoter-Functional evidence from natural polymorphisms
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موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
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چکیده انگلیسی
Pseudoxanthoma elasticum (PXE) is a heritable connective tissue disease caused by mutations in the ABCC6 gene that encodes a transmembrane transporter of unknown function, expressed mainly in the liver. It has been suggested that some PXE patients for whom no mutations can be found in the coding region of ABCC6 probably suffer from insufficient level of active protein due to lowered gene expression. Here we report the functional analysis of previously reported natural polymorphisms found in the ABCC6 gene promoter. The only polymorphism known to be significantly more common in PXE patients was located within one of the PLAG transcription factor binding sites located by us previously. This mutation negatively influenced PLAG-mediated induction of ABCC6 promoter in a reporter gene system. Moreover, site-directed mutagenesis of an analogous sequence within another PLAG-binding site in the promoter both depressed PLAG binding and specifically repressed ABCC6 promoter activity in cells of liver origin. Thus, we have identified novel sequence determinants of liver-specific transcription of the ABCC6 gene with direct relevance for at least some PXE patients.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical and Biophysical Research Communications - Volume 383, Issue 1, 22 May 2009, Pages 73-77
Journal: Biochemical and Biophysical Research Communications - Volume 383, Issue 1, 22 May 2009, Pages 73-77
نویسندگان
Marcin Ratajewski, Hugues de Boussac, Lukasz Pulaski,