Modular assembly of proteins on nanoparticles.

Modular assembly of proteins on nanoparticles.
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DOI:
10.1038/s41467-018-03931-4
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发表时间:
2018-04-16
影响因子:
16.6
通讯作者:
Ferrari E
Ferrari E
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Ma W;Saccardo A;Roccatano D;Aboagye-Mensah D;Alkaseem M;Jewkes M;Di Nezza F;Baron M;Soloviev M;Ferrari E

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Generally, the high diversity of protein properties necessitates the development of unique nanoparticle bio-conjugation methods, optimized for each different protein. Here we describe a universal bio-conjugation approach which makes use of a new recombinant fusion protein combining two distinct domains. The N-terminal part is Glutathione S-Transferase (GST) from Schistosoma japonicum, for which we identify and characterize the remarkable ability to bind gold nanoparticles (GNPs) by forming gold–sulfur bonds (Au–S). The C-terminal part of this multi-domain construct is the SpyCatcher from Streptococcus pyogenes, which provides the ability to capture recombinant proteins encoding a SpyTag. Here we show that SpyCatcher can be immobilized covalently on GNPs through GST without the loss of its full functionality. We then show that GST-SpyCatcher activated particles are able to covalently bind a SpyTag modified protein by simple mixing, through the spontaneous formation of an unusual isopeptide bond. The conjugation of nanoparticles and proteins can require complex optimization for the addition of different proteins. Here, the authors report on the development of a simple isopeptide bond forming method of conjoining gold nanoparticles and fusion proteins.
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