Phage-assisted evolution of botulinum neurotoxin proteases with reprogrammed specificity.

Phage-assisted evolution of botulinum neurotoxin proteases with reprogrammed specificity.
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DOI:
10.1126/science.abf5972
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发表时间:
2021-02-19
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Liu DR
Liu DR
中科院分区:
其他
文献类型:
--
作者:
Blum TR;Liu H;Packer MS;Xiong X;Lee PG;Zhang S;Richter M;Minasov G;Satchell KJF;Dong M;Liu DR

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While bespoke sequence-specific proteases have the potential to advance biotechnology and medicine, generating proteases with tailor-made cleavage specificities remains a major challenge. We developed a phage-assisted protease evolution system with simultaneous positive and negative selection, and applied it to three botulinum neurotoxin (BoNT) light-chain proteases. We evolved BoNT/X protease into separate variants that preferentially cleave VAMP4 and Ykt6, evolved BoNT/F protease to selectively cleave the non-native substrate VAMP7, and evolved BoNT/E protease to cleave PTEN but not any natural BoNT protease substrate in neurons. The evolved proteases display large changes in specificity (218- to >11,000,000-fold) and can retain their ability to form holotoxins that self-deliver into primary neurons. These findings establish a versatile platform for reprogramming proteases to selectively cleave new targets of therapeutic interest. Phage-assisted evolution reprograms botulinum neurotoxin proteases to selectively cleave proteins of biomedical interest in vitro and in neurons.
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