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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Chiral Transformation of Cyanine Dye Aggregates Induced by Small Peptides
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Chiral Transformation of Cyanine Dye Aggregates Induced by Small Peptides

机译：小肽诱导的花青染料聚集体的手性转化

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摘要

Three small peptides (K4, K5, and K6) with different length were designed to induce the transformation of the assembled state and the chirality of cyanine dye supramolecule. The absorption and circular dichroism (CD) results indicated that, the peptides tend to induce cyanine dye to H-aggregation, competed with Na~+ in PBS, which would induce dye to J-aggregation. Meanwhile, all three peptides could influence the chirality of both J-aggregates induced by Na~+ and H-aggregates, among which K6 could induce chiral reversion of J-aggregates. Furthermore, molecular modeling and energy calculation results have shown that the peptides with different chain length have different conformations. This might be the reason for cyanine dye to form the different chiral assembly induced by these oligo-peptide templates.
机译：设计了三个不同长度的小肽（K4，K5和K6），以诱导花青染料超分子的组装状态和手性的转变。吸收和圆二色性（CD）结果表明，该肽倾向于诱导花菁染料向H聚集，与PBS中的Na〜+竞争，从而导致染料向J聚集。同时，这三种肽均可影响Na〜+和H-聚集体诱导的J-聚集体的手性，其中K6可诱导J-聚集体的手性反转。此外，分子建模和能量计算结果表明，具有不同链长的肽具有不同的构象。这可能是花青染料形成由这些寡肽模板诱导的不同手性组装体的原因。

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