SARS-CoV-2 Spike Alterations Enhance Pseudoparticle Titers and Replication-Competent VSV-SARS-CoV-2 Virus.
SARS-CoV-2 Spike Alterations Enhance Pseudoparticle Titers and Replication-Competent VSV-SARS-CoV-2 Virus.
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DOI:
10.3390/v12121465
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发表时间:
2020-12-18
期刊:
影响因子:
--
通讯作者:
Brindley MA
中科院分区:
文献类型:
--
作者:
Havranek KE;Jimenez AR;Acciani MD;Lay Mendoza MF;Reyes Ballista JM;Diaz DA;Brindley MA
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the causative agent of the most recent global pandemic that has caused more than a million deaths around the world. The spike glycoprotein (S) drives the entry and fusion of this virus and is the main determinant of cell tropism. To explore S requirements for entry under BSL2 conditions, S has been pseudotyped onto vesicular stomatitis virus (VSV) or retroviral particles with varied success. Several alterations to S were demonstrated to improve pseudoparticle titers, but they have not been systematically compared. In this study, we produced pseudotyped VSV particles with multiple modifications to S, including truncation, mutation, and tagging strategies. The main objective of this study was to determine which modifications of the S protein optimize cell surface expression, incorporation into pseudotyped particles, and pseudoparticle entry. Removal of the last 19 residues of the cytoplasmic tail produced a hyper-fusogenic S, while removal of 21 residues increased S surface production and VSV incorporation. Additionally, we engineered a replication-competent VSV (rVSV) virus to produce the S-D614G variant with a truncated cytoplasmic tail. While the particles can be used to assess S entry requirements, the rVSV∆G/SMet1D614G∆21 virus has a poor specific infectivity (particle to infectious titer ratio).
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影响因子:
--
作者:
Hulswit RJ;de Haan CA;Bosch BJ
通讯作者:
Bosch BJ
DOI:
10.1073/pnas.92.10.4477
发表时间:
1995-05-09
影响因子:
11.1
作者:
LAWSON, ND;STILLMAN, EA;ROSE, JK
通讯作者:
ROSE, JK
影响因子:
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通讯作者:
Ritter DG
影响因子:
30.3
作者:
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通讯作者:
Whelan, Sean P. J.
影响因子:
64.5
作者:
Korber, Bette;Fischer, Will M.;Montefiori, David C.
通讯作者:
Montefiori, David C.