Catalysis of a rotational transition in a peptide by crystal forces.

Catalysis of a rotational transition in a peptide by crystal forces.
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通过晶体力催化肽中的旋转转变。

DOI:
10.1021/bi00419a002
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发表时间:
1988
期刊:
影响因子:
2.9
通讯作者:
Hagler,AT
Hagler,AT
中科院分区:
生物学3区
文献类型:
--
作者:
Kitson,DH;Hagler,AT

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方法分别在真空和晶体环境下对cyc/o-(Ala-Pro-D-Phe) 2进行100-ps分子动力学轨迹分析(Kitson & Hagler, 1988)。这种肽在一个正交单元细胞中结晶,每个单元细胞有2个肽分子和16个水分子(Brown & Teller, 1976)。晶体模拟以细胞内的两个肽分子(和16个水分子)为“不对称单元”,采用周期性边界条件再现晶体环境。临界值为15 Á。同时,这项工作得到了美国国家科学基金会的Grant DMB 8510865和美国国立卫生研究院的Grant GM 30564的支持。计算机时间(在圣地亚哥超级计算机中心的Cray X-MP/48上)由国家科学基金会(Grant PCM 8421273)和Cray研究公司提供。
Methods The 100-ps molecular dynamics trajectories were carried out on cyc/o-(Ala-Pro-D-Phe) 2 both in vacuo and in the crystal environment (Kitson & Hagler, 1988). This peptide crys-tallizes in an orthorhombic unit cell with 2 peptide molecules and 16 water molecules per unit cell (Brown & Teller, 1976). For the crystal simulation, the two peptide molecules (and the 16 waters) in the cell were taken as the “asymmetric unit” and periodic boundary conditions were used to reproduce the crystal environment. A cutoff of 15 Á was used. The simufThis work was supported by Grant DMB 8510865 from the National Science Foundation and by Grant GM 30564 from the National Insti-tutes of Health. Grants of computer time (on the Cray X-MP/48 at the San Diego Supercomputer Center) were provided by the National Sci-ence Foundation (Grant PCM 8421273) and by Cray Research Inc.
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