Major capsid reinforcement by a minor protein in herpesviruses and phage.
Major capsid reinforcement by a minor protein in herpesviruses and phage.
复制标题
在疱疹病毒和噬菌体中,次要蛋白质的主要衣壳加固。
DOI:
10.1093/nar/gku634
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发表时间:
2014-08
影响因子:
14.9
通讯作者:
Evilevitch A
中科院分区:
文献类型:
--
作者:
Sae-Ueng U;Liu T;Catalano CE;Huffman JB;Homa FL;Evilevitch A
Herpes simplex type 1 virus (HSV-1) and bacteriophage λ capsids undergo considerable structural changes during self-assembly and DNA packaging. The initial steps of viral capsid self-assembly require weak, non-covalent interactions between the capsid subunits to ensure free energy minimization and error-free assembly. In the final stages of DNA packaging, however, the internal genome pressure dramatically increases, requiring significant capsid strength to withstand high internal genome pressures of tens of atmospheres. Our data reveal that the loosely formed capsid structure is reinforced post-assembly by the minor capsid protein UL25 in HSV-1 and gpD in bacteriophage λ. Using atomic force microscopy nano-indentation analysis, we show that the capsid becomes stiffer upon binding of UL25 and gpD due to increased structural stability. At the same time the force required to break the capsid increases by ∼70% for both herpes and phage. This demonstrates a universal and evolutionarily conserved function of the minor capsid protein: facilitating the retention of the pressurized viral genome in the capsid. Since all eight human herpesviruses have UL25 orthologs, this discovery offers new opportunities to interfere with herpes replication by disrupting the precise force balance between the encapsidated DNA and the capsid proteins crucial for viral replication.
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影响因子:
5.6
作者:
Conway JF;Cockrell SK;Copeland AM;Newcomb WW;Brown JC;Homa FL
通讯作者:
Homa FL
DOI:
10.1073/pnas.0400444101
发表时间:
2004-04-20
影响因子:
11.1
作者:
Fokine, A;Chipman, PR;Rossmann, MG
通讯作者:
Rossmann, MG
影响因子:
5.4
作者:
Coller, Kelly Elizabeth;Lee, Joy I-Hsuan;Smith, Gregory Allan
通讯作者:
Smith, Gregory Allan
DOI:
10.1073/pnas.0308198101
发表时间:
2004-05-18
影响因子:
11.1
作者:
Ivanovska, IL;de Pablo, PJ;Wuite, GJL
通讯作者:
Wuite, GJL
DOI:
10.1073/pnas.0703166104
发表时间:
2007-06-05
影响因子:
11.1
作者:
Ivanovska, Irena;Wuite, Gijs;Evilevitch, Alex
通讯作者:
Evilevitch, Alex