Crystal and molecular structure of cyclo(L-prolyl-glycyl)3. A cyclic hexapeptide with a cis peptide bond.
Crystal and molecular structure of cyclo(L-prolyl-glycyl)3. A cyclic hexapeptide with a cis peptide bond.
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环(L-脯氨酰-甘氨酰)3 的晶体和分子结构。
DOI：
10.1111/j.1399-3011.1986.tb01799.x
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发表时间：
1986
期刊：
影响因子：
--
通讯作者：
Varughese,KI
中科院分区：
文献类型：
--
作者：
Kartha,G;Aimoto,S;Varughese,KI
使用X射线晶体学技术解析了环(L-Pro-Gly)3的晶体结构。该肽的主链是不对称的，由五个转肽单元和一个顺肽组成。有一个氢键水桥连接羰基氧 O1 和 O4。分子以二聚体形式存在于晶格中。二聚体的两个分子通过晶体双重对称性相关，并通过两个 N-H O 氢键连接。该晶体为三角晶体，空间群 P3212，a = 11.379(3)、c = 32.93(1) 和 z = 6。该结构通过多解法求解，并通过最小二乘技术精修至 R 为 0.083。
The crystal structure of cyclo(L‐Pro‐Gly)3was solved using X‐ray crystallographic techniques. The backbone of the peptide is asymmetric and is made up of fivetranspeptide units and onecispeptide. There is a hydrogen bonded water bridge that links the carbonyl oxygens, O1 and O4. The molecules exist as dimers in the crystal lattice. The two molecules of the dimer are related by crystallographic twofold symmetry and are linked by two N‐H O hydrogen bonds. The crystals are trigonal, space group P3212 with a = 11.379(3), c = 32.93(1) and z = 6. The structure was solved by multisolution methods and refined by least squares technique to an R of 0.083.