News Release

设计而成的黑色素

Peer-Reviewed Publication

American Association for the Advancement of Science (AAAS)

Pigments By Design

image: Polymeric pigments produced by guided oxidation of peptide assemblies. This material relates to a paper that appeared in the June 9, 2017, issue of Science, published by AAAS. The paper, by A. Lampel at City University of New York in New York, N.Y., and colleagues was titled, "Polymeric peptide pigments with sequence-encoded properties." view more 

Credit: Photography by Matej Vakula, NYC

研究人员发现了如何仅通过变换肽的顺序来调控黑色素的光学和电性质;黑色素是一种自然色素,它是影响皮肤颜色的主要因素。黑色素这种色素存在于大多数的生命形式中,其中包括植物、细菌、真菌和动物;该色素在这些生物体中的作用是呈现颜色及防护各种会损坏细胞的应激。然而,黑色素的光学、电子和自由基性质也令它们成为材料和生物医药应用的宠儿。在这里,Ayala Lampel和同事发现了一个小型的含有三肽前体的黑色素肽亚组,这些前体在酪氨酸酶存在时会进行自组装。他们发现,这些3肽的6种不同的序列组合会显示出明显不同的颜色,它们可显示出从米色至棕黑色等不同颜色。显微镜检查揭示,这些肽的不同序列会在纳米尺度影响其形态、刚度和氧化水平。=在一则相关的《视角》中,Marco d'Ischia和Phillip B. Messersmith提出,鉴于肽类所具有的结构和化学多样性,这一化学反应的范围可被大大地扩展。

###


Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.