Isolation and detection of a KDEL-tagged recombinant cholera toxin B subunit from Nicotiana benthamiana.
Isolation and detection of a KDEL-tagged recombinant cholera toxin B subunit from Nicotiana benthamiana.
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DOI:
10.1016/j.procbio.2020.10.018
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发表时间:
2021-03
期刊:
影响因子:
--
通讯作者:
Matoba N
中科院分区:
文献类型:
--
作者:
Morris DA;Reeves MA;Royal JM;Hamorsky KT;Matoba N
Here we describe refined methods for the isolation and detection of a KDEL-tagged, plant-produced recombinant cholera toxin B subunit (CTB) that exhibits unique mucosal wound healing activity. The protein was transiently overexpressed in Nicotiana benthamiana, which generates some C-terminal KDEL truncated molecular species that are deficient in epithelial repair activity. With a new CHT chromatographical method described herein, these product-derived impurities were successfully separated from CTB with the intact KDEL sequence, as confirmed by mass spectrometry. In addition, an immunoassay capable of specifically detecting GM1 ganglioside-binding CTB with intact KDEL sequences was developed. Coupled together, these methods will aid in the quality control of KDEL-attached CTB produced in plant-based manufacturing systems towards a novel topical biotherapeutic for the treatment of acute and chronic mucosal inflammation.
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