کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2008421 1066411 2006 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structure–activity studies of new melanocortin peptides containing an aromatic amino acid at the N-terminal position
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Structure–activity studies of new melanocortin peptides containing an aromatic amino acid at the N-terminal position
چکیده انگلیسی

Cyclic melanotropin peptides, designed with an aromatic amino acid substitution at the N-terminal position of the MT-II-type scaffold, were prepared by solid-phase peptide synthesis and evaluated for their ability to bind to and activate human melanocortin-1, -3, -4, and -5 receptors. The structure–activity studies of these MT-II analogues have identified a selective antagonist at the hMC4R (H-Phe-c[Asp-Pro-d-Nal(2′)-Arg-Trp-Gly-Lys]-NH2, pA2 = 8.7), a selective partial agonist at the hMC4R (H-d-Nal(2′)-c[Asp-Pro-d-Phe-Arg-Trp-Gly-Lys]-NH2, IC50 = 11 nM, EC50 = 56 nM), and a selective partial agonist at the hMC3R (H-d-Phe-c[Asp-Pro-d-Phe-Arg-Trp-Lys]-NH2, IC50 = 3.7 nM, EC50 = 4.9 nM). Aromatic amino acid substitution at the N-terminus in conjuction with the expansion of the 23-membered cyclic lactam MT-II scaffold to a 26-membered scaffold by addition of a Gly residue in position 10 leads to melanotropin peptides with enhanced receptor selectivity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Peptides - Volume 27, Issue 2, February 2006, Pages 472–481
نویسندگان
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