Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8348076 | Peptides | 2015 | 5 Pages |
Abstract
The FGLamide allatostatins (ASTs) can inhibit the production of juvenile hormone in vitro, and they therefore are regarded as possible insect growth regulator candidates for pest control. To understand the structural features of the ASTs that cause the differences in their activity the pentapeptide and four N-terminal modifications of AST analogs (H17, K9, K10 and K23) were selected to investigate their conformations. From NMR spectroscopy and molecular modeling, it is clear that K23 and K9 have a type IV β-turn and a γ turn in DMSO, respectively. The pentapeptide, H17 and K10 form a flexible conformation. Our study indicates that this flexible conformation could be an important and indispensable structural element for activity, whereas the turn structure may not be especially significant for biological activity.
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Biochemistry
Authors
Xie Yong, Zhang Li, Wu Xiao Qing, Zhang Chuan Liang, Yang Xin Ling, Stephen S. Tobe,