کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
444606 693016 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comprehensive structural characterization of the cyclic disulphide-bridged nonapeptides, Arg- and Lys-conopressins
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Comprehensive structural characterization of the cyclic disulphide-bridged nonapeptides, Arg- and Lys-conopressins
چکیده انگلیسی

Arg-conopressin-S and Lys-conopressin-G are cyclic disulphide-bridged nonapeptides isolated from the venom of cone snails. We performed a comprehensive conformational analysis for the cis and trans isomers of these conopeptides, in order to identify their characteristic structural and conformational features. In the course of our theoretical study, the Φ–Ψ and χ1 conformational spaces were explored in detail and the conformational distributions were compared to each other. For both cis and trans isomers of conopressins, the characteristic secondary structural elements and intramolecular H-bonds were identified. Our results pointed out that various turn structures stabilized by typical intramolecular H-bonds could be observed in the conformers of these conopeptides. Comparing the different conformational features of the cis and trans isomers of conopressins disclosed that several of them could be found for both isomers, however, structural properties characteristic for only the cis or trans isomer were also identified. Altogether, our comprehensive conformational study provided a detailed description of the three-dimensional (3D) structure of both conopressins.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Graphics and Modelling - Volume 27, Issue 8, June–July 2009, Pages 881–888
نویسندگان
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