Scalable Geometrically Designed Protein Cages Assembled via Genetically Encoded Split Inteins.
Scalable Geometrically Designed Protein Cages Assembled via Genetically Encoded Split Inteins.
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通过基因编码的分裂内含肽组装的可扩展几何设计的蛋白质笼。
DOI:
10.1016/j.str.2019.02.005
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Wright JN
中科院分区:
文献类型:
--
作者:
Wright JN
Engineering proteins to assemble into user-defined structures is key in their development for biotechnological applications. However, designing generic rather than bespoke solutions is challenging. Here we describe an expandable recombinant assembly system that produces scalable protein cages via split intein-mediated native chemical ligation. Three types of component are used: two complementary oligomeric "half-cage" protein fusions and an extendable monomeric "linker" fusion. All are composed of modular protein domains chosen to fulfill the required geometries, with two orthogonal pairs of split intein halves to drive assembly when mixed. This combination enables both one-pot construction of two-component cages and stepwise assembly of larger three-component scalable cages. To illustrate the system's versatility, trimeric half-cages and linker constructs comprising consensus-designed repeat proteins were ligated in one-pot and stepwise reactions. Under mild conditions, rapid high-yielding ligations were obtained, from which discrete proteins cages were easily purified and shown to form the desired trigonal bipyramidal structures.
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