Non-classical Helices with<i>cis</i>Carbon-Carbon Double Bonds in the Backbone: Structural Features of α,γ-Hybrid Peptide Foldamers
作者:Mothukuri Ganesh Kumar、Varsha J. Thombare、Mona M. Katariya、Kuruva Veeresh、K. Muruga Poopathi Raja、Hosahudya N. Gopi
DOI:10.1002/anie.201602861
日期:2016.6.27
The impact of geometrically constrained cis α,β‐unsaturated γ‐amino acids on the folding of α,γ‐hybrid peptides was investigated. Structure analysis in single crystals and in solution revealed that the cis carbon–carbon double bonds can be accommodated into the 12‐helix without deviation from the overall helical conformation. The helical structures are stabilized by 4→1 hydrogen bonding in a similar
研究了几何约束的顺式α,β-不饱和γ-氨基酸对α,γ-杂合肽折叠的影响。对单晶和溶液的结构分析表明,顺式碳-碳双键可以容纳在12螺旋中,而不会偏离整体螺旋构象。螺旋结构通过4→1氢键稳定,与β肽的12个螺旋和3个10个α肽的螺旋相似。这些结果表明,功能性顺式碳-碳双键可以容纳在螺旋肽的骨架中。