Experimental and computational insights into the conformations of tunicyclin E, a new cycloheptapeptide from Psammosilene tunicoides
文献类型：期刊论文
| 作者 | Tian, Jun-Mian1; Ou-Yang, Si-Sheng2; Zhang, Xu3; Di, Ying-Tong4; Jiang, Hua-Liang2,5; Li, Hong-Lin5; Dai, Wei-Xing1; Chen, Ke-Yu1; Liu, Mai-Li3; Hao, Xiao-Jiang4 |
| 刊名 | RSC ADVANCES
 |
| 出版日期 | 2012 |
| 卷号 | 2期号:3页码:1126-1135 |
| 英文摘要 | Tunicyclin E (1), a new cyclic heptapeptide, cyclo(Pro(1)-Ser(2)-Trp(3)-Leu(4)-Val(5)-Gly(6)-Ser(7)), was isolated from the root of Psammosilene tunicoides. The presence of two sets of resonance signals in its NMR spectra (1a:1b, similar to 3 : 1 abundance) indicated that it has two conformations in solution, while only one conformation was found in its crystal state by X-ray diffraction. To explore the molecular basis of the two conformations of 1 in solution and their interconversion mechanism, X-ray diffraction, NMR experiments, and theoretical calculations were performed. The results disclosed that two conformers of 1 in solution were derived from the cis/trans isomers of the Ser(7)-Pro(1) peptide bond (1a, trans; 1b, cis). The fast interconversion of the two conformations in solution is explained by an intramolecular catalysis mechanism and solvent effects. Furthermore, the existence of several unusual pseudo turns characterized for the first time plays a key role for dominant trans conformation in solution. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Chemistry, Multidisciplinary |
| 研究领域[WOS] | Chemistry |
| 关键词[WOS] | CIS-TRANS-ISOMERIZATION ; PEPTIDE-BOND ISOMERIZATION ; CYCLIC-PEPTIDES ; CIS/TRANS ISOMERIZATION ; PROLINE ISOMERIZATION ; MOLECULAR-DYNAMICS ; CATALYSIS ; PROTEIN ; SPECTROSCOPY ; ACIDS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000299177000055 |
| 公开日期 | 2015-07-14 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/1738]  |
| 专题 | 武汉物理与数学研究所_磁共振基础研究部 |
| 作者单位 | 1.Second Mil Med Univ, Sch Pharm, Dept Phytochem, Shanghai 200433, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Mat Med, Drug Discovery & Design Ctr, Shanghai 201203, Peoples R China 3.Chinese Acad Sci, Wuhan Inst Phys & Math, Sate Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China 4.Chinese Acad Sci, Kunming Inst Bot, State Key Lab Phytochem & Plant Resources W China, Kunming 650204, Peoples R China 5.E China Univ Sci & Technol, Sch Pharm, Shanghai 200237, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tian, Jun-Mian,Ou-Yang, Si-Sheng,Zhang, Xu,et al. Experimental and computational insights into the conformations of tunicyclin E, a new cycloheptapeptide from Psammosilene tunicoides[J]. RSC ADVANCES,2012,2(3):1126-1135. |
| APA | Tian, Jun-Mian.,Ou-Yang, Si-Sheng.,Zhang, Xu.,Di, Ying-Tong.,Jiang, Hua-Liang.,...&Zhang, Wei-Dong.(2012).Experimental and computational insights into the conformations of tunicyclin E, a new cycloheptapeptide from Psammosilene tunicoides.RSC ADVANCES,2(3),1126-1135. |
| MLA | Tian, Jun-Mian,et al."Experimental and computational insights into the conformations of tunicyclin E, a new cycloheptapeptide from Psammosilene tunicoides".RSC ADVANCES 2.3(2012):1126-1135. |
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来源：武汉物理与数学研究所
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