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Catalytic role of traditional enzymes for biosynthesis of biogenic metallic nanoparticles: a mini-review

机译：传统酶对生物金属纳米颗粒生物合成的催化作用：综述

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摘要

Although the formation mechanism of biogenically metallic nanoparticles is broadly associated to enzyme mediation, major attention has been given to the role of proteins and peptides in oxido-reduction of metallic ions leading to these nanostructures. Among the wide range of biomolecules that can act not only as capping agents but also as non-enzymatic agents to form nanoparticles, disulphide bridge-containing peptides and amino acids particularly stand out. The literature proposes that they actively participate in the process of nanoparticles' synthesis, with thiols groups and disulphide bridge moieties as the reaction catalytic sites. Similarly, denaturated enzymes containing exposed S-S or S-H moieties are also able to reduce metallic ions to form nanoparticles. This mini-review is focused on the biogenic synthesis of metallic nanoparticles such as gold, silver, copper, platinum, palladium, lead and selenium, in which proteins, peptides, reductases and even oxido-reductases act as non-enzymatic catalysts of the reduction reaction, opening economically and ecologically favourable perspectives in the nanoparticles synthesis field.
机译：尽管生物型金属纳米颗粒的形成机理广泛地与酶介导有关，但是人们已经对蛋白质和肽在导致这些纳米结构的金属离子的氧化还原中的作用给予了极大的关注。在不仅可以用作封端剂而且可以用作形成纳米颗粒的非酶试剂的多种生物分子中，含二硫键的肽和氨基酸尤其突出。文献提出，它们以硫醇基和二硫键部分作为反应催化位点，积极参与纳米颗粒的合成过程。类似地，含有暴露的S-S或S-H部分的变性酶也能够还原金属离子以形成纳米颗粒。这篇小型综述的重点是金属纳米颗粒（如金，银，铜，铂，钯，铅和硒）的生物合成，其中蛋白质，肽，还原酶甚至氧化还原酶充当还原反应的非酶催化剂反应，在纳米颗粒合成领域开辟了经济和生态上有利的前景。

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