کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1937516 1050717 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Interactions between α-conotoxin MI and the Torpedo marmorata receptor α-δ interface
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Interactions between α-conotoxin MI and the Torpedo marmorata receptor α-δ interface
چکیده انگلیسی
The muscle-type nicotinic receptor has two distinguishable acetylcholine binding sites at the α-γ and α-δ subunit interfaces; α-conotoxins can bind them selectively. Moreover, we previously reported that α-conotoxin MI can interact with Torpedo californica and Torpedo marmorata receptors showing that conotoxins can also detect receptors from different species of the same genus [L. Cortez, S.G. del Canto, F. Testai, M.B. de Jiménez Bonino, Conotoxin MI inhibits the acetylcholine binding site of the Torpedo marmorata receptor, Biochem. Biophys. Res. Commun. 295 (2002) 791-795]. Herein, to identify T. marmorata receptor regions involved in α-conotoxin MI binding, a photoactivatable reagent was used and labeled sites were mapped by enzymatic proteolysis, MALDI-TOF-MS and Edman degradation. α-Conotoxin MI binding determinants were found and studies revealed a second binding motif at the α/δ interface. A proposal for receptor-toxin interaction is discussed based on experimental results and docking studies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical and Biophysical Research Communications - Volume 355, Issue 1, 30 March 2007, Pages 275-279
نویسندگان
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