The Effects of C-Terminal Modifications on the Opioid Activity of [<i>N</i>-BenzylTyr<sup>1</sup>]Dynorphin A-(1−11) Analogues
作者:Kshitij A. Patkar、Thomas F. Murray、Jane V. Aldrich
DOI:10.1021/jm900715m
日期:2009.11.12
peptide dynorphin (Dyn) A have focused on the N-terminal “message” sequence based on the “message-address” concept. To test the hypothesis that changes in the C-terminal “address” domain could affect efficacy, modified amino acids and cyclic constraints were incorporated into this region of the partial agonist [N-benzylTyr1]Dyn A-(1−11). Modifications in the C-terminal domain of [N-benzylTyr1]Dyn A-(1−11)NH2
影响内源性阿片肽强啡肽 (Dyn) A 类似物功效的结构修饰侧重于基于“消息地址”概念的 N 端“消息”序列。为了检验 C 端“地址”结构域的变化可能影响功效的假设,将修饰的氨基酸和循环约束并入部分激动剂 [ N- benzylTyr 1 ]Dyn A-(1-11) 的该区域。[ N- benzylTyr 1 ]Dyn A-(1−11)NH 2的 C 端结构域中的修饰导致所有线性类似物的 κ 阿片受体 (KOR) 亲和力增加,但不影响这些肽在韩国。位置 5 和 8 之间的环化产生 [ N-benzylTyr 1 , cyclo ( d -Asp 5 ,Dap 8 )]Dyn A-(1−11)NH 2 (zyklophin, 13 ) ( J. Med. Chem. 2005 , 48 , 4500−4503) 对 KOR 具有高选择性. 与线性肽相比,该肽在腺苷酸环化酶 (AC) 测定中的功效可忽略不计,并且是