High-throughput analysis and protein engineering using microcapillary arrays.

High-throughput analysis and protein engineering using microcapillary arrays.
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DOI:
10.1038/nchembio.1978
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发表时间:
2016-02
影响因子:
14.8
通讯作者:
Cochran JR
Cochran JR
中科院分区:
生物学1区
文献类型:
--
作者:
Chen B;Lim S;Kannan A;Alford SC;Sunden F;Herschlag D;Dimov IK;Baer TM;Cochran JR

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We describe a multi-purpose technology platform, termed μSCALE (Microcapillary Single Cell Analysis and Laser Extraction), that enables massively parallel, quantitative biochemical and biophysical measurements on millions of protein variants expressed from yeast or bacteria. μSCALE spatially segregates single cells within a microcapillary array, enabling repeated imaging, cell growth, and protein expression. We performed high-throughput analysis of cells and their protein products using a range of fluorescent assays, including binding affinity measurements and dynamic enzymatic assays. A precise laser-based extraction method allows rapid recovery of live clones and their genetic material from microcapillaries for further study. With μSCALE, we discovered a new antibody against a clinical cancer target, evolved an orange fluorescent protein biosensor, and engineered an enzyme with reduced sensitivity to its inhibitor. These three distinct protein analysis and engineering applications, each with unique assay requirements and different host organisms, highlight the flexibility and technical capabilities of our platform.
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