Distinct Gag interaction properties of HIV-1 RNA 5' leader conformers reveal a mechanism for dimeric genome selection.
Distinct Gag interaction properties of HIV-1 RNA 5' leader conformers reveal a mechanism for dimeric genome selection.
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HIV-1 RNA 5â2 先导构象异构体的独特 Gag 相互作用特性揭示了二聚体基因组选择的机制
DOI:
10.1261/rna.079347.122
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发表时间:
2023-02
期刊:
影响因子:
--
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中科院分区:
文献类型:
--
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During HIV-1 assembly, two copies of viral genomic RNAs (gRNAs) are selectively packaged into new viral particles. This process is mediated by specific interactions between HIV-1 Gag and the packaging signals at the 5′ leader (5′L) of viral gRNA. 5′L is able to adopt different conformations, which promotes either gRNA dimerization and packaging or Gag translation. Dimerization and packaging are coupled. Whether the selective packaging of the gRNA dimer is due to favorable interactions between Gag and 5′L in the packaging conformation is not known. Here, using RNAs mimicking the two 5′L conformers, we show that the 5′L conformation dramatically affects Gag–RNA interactions. Compared to the RNA in the translation conformation (5′LT), the RNA in the packaging conformation (5′LP) can bind more Gag molecules. Gag associates with 5′LP faster than it binds to 5′LT, whereas Gag dissociates from 5′LP more slowly. The Gag–5′LP complex is more stable at high salt concentrations. The NC–SP2–p6 region of Gag likely accounts for the faster association and slower dissociation kinetics for the Gag–5′LP interaction and for the higher stability. In summary, our data suggest that conformational changes play an important role in the selection of dimeric genomes, probably by affecting the binding kinetics and stability of the Gag–5′L complex.
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影响因子:
4.5
作者:
Jones, Christopher P.;Saadatmand, Jenan;Musier-Forsyth, Karin
通讯作者:
Musier-Forsyth, Karin
影响因子:
5.4
作者:
Dilley, Kari A.;Nikolaitchik, Olga A.;Hu, Wei-Shau
通讯作者:
Hu, Wei-Shau
DOI:
10.1146/annurev-virology-092917-043448
发表时间:
2018-01-01
期刊:
ANNUAL REVIEW OF VIROLOGY, VOL 5
影响因子:
--
作者:
Bieniasz, Paul;Telesnitsky, Alice
通讯作者:
Telesnitsky, Alice
影响因子:
4.1
作者:
Dubois, Noe;Khoo, Keith K.;Bernacchi, Serena
通讯作者:
Bernacchi, Serena
影响因子:
30.3
作者:
Bou-Nader C;Muecksch F;Brown JB;Gordon JM;York A;Peng C;Ghirlando R;Summers MF;Bieniasz PD;Zhang J
通讯作者:
Zhang J