Modeling of alpha-MSH conformations with implicit solvent.

Modeling of alpha-MSH conformations with implicit solvent.
复制标题

使用隐式溶剂对 α-MSH 构象进行建模。

DOI:
--
复制
发表时间:
1999
期刊:
Journal of Peptide Research
影响因子:
--
通讯作者:
B. Pettitt
B. Pettitt
中科院分区:
--
文献类型:
--
作者:
N. Prabhu;J. Perkyns;B. Pettitt

文献摘要

参考文献

被引文献

相似文献

对荷尔蒙α-MSH在水溶液中最可能的结构进行了构象搜索,以帮助确定生物活性所必需的结构特征。自由能表面采用积分方程法模拟,高温分子动力学用于加强构象采样。已经发现了低自由能结构的家族。最小能量结构在推测的信息区显示出稳定的β转角构象,该构象由Glu5和Lys11之间的盐桥稳定。侧链的取向反映了多肽的两亲性,观察到His6、Phe7和Trp9的侧链之间存在密切的相互作用。在最小能量结构中观察到的几个结构特征与实验结果吻合得很好。这些构象特征导致了一种受体-激素相互作用模型的假说,在该模型中,Phe7和Trp9的疏水侧链与人黑素皮质素(MC1)受体的跨膜部分相互作用。此外,Arg8的正电侧链和His6的咪唑侧链可能与受体的负电部分相互作用,这些负电部分甚至可能位于受体的胞外环上。
A conformational search for the most probable structures of the hormone alpha-MSH in aqueous solution was performed in order to help determine the structural features necessary for biological activity. The free-energy surface was modeled using methods from integral equation theory, and high-temperature molecular dynamics was used to enhance conformational sampling. Families of low free-energy structures have been found. The minimum energy structure shows a stable beta-turn conformation in the putative message region that is stabilized by a salt bridge between Glu5 and Lys11. The orientation of the side chains reflects the amphiphilic nature of the peptide, and a close interaction between the side chains of the His6, Phe7 and Trp9 was observed. Several structural features observed in the minimum energy structure agree well with experimental results. The conformational features led to a hypothesis of a receptor-hormone interaction model in which the hydrophobic side chains of Phe7 and Trp9 interact with the transmembrane portion of the human melanocortin (MC1) receptor. Also, the positively charged side chain of Arg8 and the imidazole side chain of His6 may interact with the negatively charged portions of the receptor which may even be on the receptor's extracellular loops.
Ac-[Nle4]α-MSH4-11-NH2 的环状内酰胺类似物。
DOI: 10.1021/bi00421a029
发表时间: 1988
期刊: Biochemistry
影响因子: 2.9
作者:
Sugg,EE;Castrucci,AM;Hadley,ME;vanBinst,G;Hruby,VJ
通讯作者: Hruby,VJ
高效环状 [Cys4,Cys10]促黑素类似物的结构-活性研究。
DOI: 10.1021/jm00356a002
发表时间: 1983
影响因子: 7.3
作者:
Knittel,JJ;Sawyer,TK;Hruby,VJ;Hadley,ME
通讯作者: Hadley,ME
hMC1R 黑皮质素受体的三维分子模型:与促黑素肽激动剂的复合物。
DOI: --
发表时间: 1996
期刊: Drug design and discovery.
影响因子: --
作者:
Haskell-Luevano,C;Sawyer,TK;Trumpp-Kallmeyer,S;Bikker,JA;Humblet,C;Gantz,I;Hruby,VJ
通讯作者: Hruby,VJ
DOI: 10.1073/pnas.77.10.5754
发表时间: 1980-01-01
期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子: --
作者:
SAWYER, TK;SANFILIPPO, PJ;HADLEY, ME
通讯作者: HADLEY, ME
DOI: 10.1126/science.1325670
发表时间: 1992-08-28
期刊: SCIENCE
影响因子: 56.9
作者:
MOUNTJOY, KG;ROBBINS, LS;CONE, RD
通讯作者: CONE, RD