Multiple N-methylation of MT-II backbone amide bonds leads to melanocortin receptor subtype hMC1R selectivity: pharmacological and conformational studies.

Multiple N-methylation of MT-II backbone amide bonds leads to melanocortin receptor subtype hMC1R selectivity: pharmacological and conformational studies.
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DOI:
10.1021/ja101428m
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发表时间:
2010-06-16
影响因子:
15
通讯作者:
Kessler, Horst
Kessler, Horst
中科院分区:
化学1区
文献类型:
--
作者:
Doedens, Lucas;Opperer, Florian;Cai, Minying;Beck, Johannes G.;Dedek, Matt;Palmer, Erin;Hruby, Victor J.;Kessler, Horst

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多重N-甲基化是一种提高多肽生物利用度和增加受体亚型选择性的新技术。该技术已应用于这里的超级有效的,但非选择性的环肽MT-II。已经合成了所有可能的31种骨架N-甲基化衍生物的文库,并测试了在黑皮质素受体亚型1、3、4和5处的结合和活化。结果表明,每引入一个N-甲基基团,选择性都得到了提高,从而产生了几种N-甲基化的hMC 1 R选择性和有效的激动剂。这些衍生物中最有效的是在环状结构中的五个酰胺键中的四个上N-甲基化。其溶液结构表明强烈优选的骨架构象,其类似于其他a-MSH类似物,但具有小得多的灵活性,此外在单个氨基酸侧链的空间排列中具有明显差异。
Multiple N-methylation is a novel technology to improve bioavailability of peptides and increase receptor subtype selectivity. This technique has been applied here to the superpotent but non-selective cyclic peptide MT-II. A library of all possible 31 backbone N-methylated derivatives has been synthesized and tested for binding and activation at melanocortin receptor subtypes 1, 3, 4 and 5. It turned out that selectivity is improved with every introduced N-methyl group, resulting in several N-methylated selective and potent agonists for the hMC1R. The most potent of these derivatives is N-methylated on four out of five amide bonds in the cyclic structure. Its solution structure indicates a strongly preferred backbone conformation which resembles other a-MSH analogs but possesses much less flexibility and in addition distinct differences in the spatial arrangement of individual amino acid side chains.
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发表时间: 1981-01-01
期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
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