A single point mutation in precursor protein VI doubles the mechanical strength of human adenovirus.
A single point mutation in precursor protein VI doubles the mechanical strength of human adenovirus.
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DOI:
10.1007/s10867-017-9479-y
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发表时间:
2018-06
影响因子:
1.8
通讯作者:
Roos WH
中科院分区:
文献类型:
--
作者:
van Rosmalen MGM;Nemerow GR;Wuite GJL;Roos WH
Viruses are extensively studied as vectors for vaccine applications and gene therapies. For these applications, understanding the material properties of viruses is crucial for creating optimal functionality. Using atomic force microscopy (AFM) nanoindentation, we studied the mechanical properties of human adenovirus type 5 with the fiber of type 35 (Ad5F35) and compared it to viral capsids with a single point mutation in the protein VI precursor protein (pVI-S28C). Surprisingly, the pVI-S28C mutant turned out to be twice as stiff as the Ad5F35 capsids. We suggest that this major increase in strength is the result of the DNA crosslinking activity of precursor protein VII, as this protein was detected in the pVI-S28C mutant capsids. The infectivity was similar for both capsids, indicating that mutation did not affect the ability of protein VI to lyse the endosomal membrane. This study highlights that it is possible to increase the mechanical stability of a capsid even with a single point mutation while not affecting the viral life cycle. Such insight can help enable the development of more stable vectors for therapeutic applications. The online version of this article (10.1007/s10867-017-9479-y) contains supplementary material, which is available to authorized users.
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影响因子:
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作者:
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通讯作者:
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影响因子:
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作者:
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DOI:
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发表时间:
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