کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10770744 1050835 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
T-cadherin GPI-anchor is insufficient for apical targeting in MDCK cells
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
T-cadherin GPI-anchor is insufficient for apical targeting in MDCK cells
چکیده انگلیسی
T-cadherin is a 95 kDa glycoprotein member of the cadherin family of adhesion molecules attached to the extracellular surface of the cell membrane through a glycosyl-phosphatidylinositol (GPI)-anchor. Whether a T-cadherin ectodomain apical targeting signal or the GPI-anchor itself targets this protein to the apical membrane is not known. Chimeras of the reporter EGFP and T-cadherin have demonstrated that a minimal construct consisting of the C-terminal 25 amino acids including the N690 (ω-site) of T-cadherin was sufficient to GPI-anchor the EGFP protein. However, efficient GPI-anchor with minimal secretion of the protein required an additional 5 residues (ω-1 to ω-5). The GPI-anchored chimeras fractionated to the Triton X-100 detergent insoluble fraction and were released to the cell culture supernatant by phosphoinositide-specific phospho-lipase C digestion. When expressed in MDCK cells, all GPI-anchored chimeras targeted to the basolateral membrane, while the T/N-chimera and the wild-type T-cadherin targeted to the apical membrane. Therefore, T-cadherin is an example of another rare GPI-anchored protein where the anchor itself is not sufficient for apical targeting in MDCK cells.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical and Biophysical Research Communications - Volume 329, Issue 2, 8 April 2005, Pages 624-631
نویسندگان
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