A streptavidin variant with slower biotin dissociation and increased mechanostability.
A streptavidin variant with slower biotin dissociation and increased mechanostability.
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DOI:
10.1038/nmeth.1450
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发表时间:
2010-05
期刊:
影响因子:
48
通讯作者:
Howarth, Mark
中科院分区:
文献类型:
--
作者:
Chivers, Claire E.;Crozat, Estelle;Chu, Calvin;Moy, Vincent T.;Sherratt, David J.;Howarth, Mark
Streptavidin binds biotin-conjugates with exceptional stability, but dissociation does occur and can be limiting in imaging, DNA amplification, and nanotechnology. We identified a mutant streptavidin, which we call traptavidin, showing ~10-fold slower biotin off-rate, increased mechanical strength, and improved thermostability; this resilience should find diverse applications. We show that the motor protein FtsK could strip proteins from DNA, rapidly displacing streptavidin from biotinylated DNA; traptavidin resisted displacement and thus indicated the force generated by FtsK translocation.
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