Bacterial extracellular protein interacts with silver ions to produce protein-encapsulated bactericidal AgNPs

Noreen Ashraf, Fiaz Ahmad, Yandu Lu, Da Chuan Yin

科研成果: 期刊稿件文章同行评审

12 引用 (Scopus)

摘要

Silver nanoparticles (AgNPs) have several applications in nanomedicine where the use of bacterial proteins for synthesis and capping of nanoparticles remain unstudied. Therefore, an extracellular protein of Enterobacter cloacae (SMP1) with ∼15.6 kDa size was partially purified and utilized for the synthesis of AgNPs. Synthesized AgNPs were detected by UV–vis spectrophotometer and characterized by dynamic light scattering (DLS), atomic force microscopy (AFM), cryo-scanning transmission electron microscopy (Cryo-STEM), and high-resolution transmission electron microscopy (HR-TEM). These AgNPs were monodispersed, spherical/quasi-spherical with zeta potential (ZP) of -26.9 mV with an average size of 58.75 nm measured by DLS. The encapsulation of AgNPs with protein was confirmed by electron elemental mapping and the potential mechanism of the synthesis of protein encapsulated AgNPs is outlined. These AgNPs showed broad spectrum bactericidal activity to clinical antibiotic-resistant bacteria. This study revealed that the extracellular protein of bacteria play a vital role in the synthesis of protein-encapsulated bactericidal AgNPs.

源语言英语
页(从-至)120-129
页数10
期刊Process Biochemistry
106
DOI
出版状态已出版 - 7月 2021

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