Thermostable exoshells fold and stabilize recombinant proteins.

Thermostable exoshells fold and stabilize recombinant proteins.
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DOI:
10.1038/s41467-017-01585-2
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发表时间:
2017-11-13
影响因子:
16.6
通讯作者:
Drum CL
Drum CL
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Deshpande S;Masurkar ND;Girish VM;Desai M;Chakraborty G;Chan JM;Drum CL

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The expression and stabilization of recombinant proteins is fundamental to basic and applied biology. Here we have engineered a thermostable protein nanoparticle (tES) to improve both expression and stabilization of recombinant proteins using this technology. tES provides steric accommodation and charge complementation to green fluorescent protein (GFPuv), horseradish peroxidase (HRPc), and Renilla luciferase (rLuc), improving the yields of functional in vitro folding by ~100-fold. Encapsulated enzymes retain the ability to metabolize small-molecule substrates, presumably via four 4.5-nm pores present in the tES shell. GFPuv exhibits no spectral shifts in fluorescence compared to a nonencapsulated control. Thermolabile proteins internalized by tES are resistant to thermal, organic, chaotropic, and proteolytic denaturation and can be released from the tES assembly with mild pH titration followed by proteolysis. Improving recombinant protein expression and stabilization remains a significant challenge. Here, the authors engineer Archaeoglobus fulgidus ferritin as a thermostable exoshell to provide steric accommodation and charge complementation for recombinant proteins, which can improve yields by 100 fold.
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