Characterization of host proteins interacting with the lymphocytic choriomeningitis virus L protein

K. Khamina, A. Lercher, M. Caldera, C. Schliehe, B. Vilagos, M. Sahin, L. Kosack, A. Bhattacharya, P. Májek, A. Stukalov, R. Sacco, L. James, D. Pinschewer, K. Bennett, J. Menche, A. Bergthaler, PLoS Pathogens 13 (2017).

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Abstract
RNA-dependent RNA polymerases (RdRps) play a key role in the life cycle of RNA viruses and impact their immunobiology. The arenavirus lymphocytic choriomeningitis virus (LCMV) strain Clone 13 provides a benchmark model for studying chronic infection. A major genetic determinant for its ability to persist maps to a single amino acid exchange in the viral L protein, which exhibits RdRp activity, yet its functional consequences remain elusive. To unravel the L protein interactions with the host proteome, we engineered infectious L protein-tagged LCMV virions by reverse genetics. A subsequent mass-spectrometric analysis of L protein pulldowns from infected human cells revealed a comprehensive network of interacting host proteins. The obtained LCMV L protein interactome was bioinformatically integrated with known host protein interactors of RdRps from other RNA viruses, emphasizing interconnected modules of human proteins. Functional characterization of selected interactors highlighted proviral (DDX3X) as well as antiviral (NKRF, TRIM21) host factors. To corroborate these findings, we infected Trim21-/-mice with LCMV and found impaired virus control in chronic infection. These results provide insights into the complex interactions of the arenavirus LCMV and other viral RdRps with the host proteome and contribute to a better molecular understanding of how chronic viruses interact with their host.
Publishing Year
Date Published
2017-12-01
Journal Title
PLoS Pathogens
Volume
13
Issue
12
Article Number
e1006758
ISSN
IST-REx-ID

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Khamina K, Lercher A, Caldera M, et al. Characterization of host proteins interacting with the lymphocytic choriomeningitis virus L protein. PLoS Pathogens. 2017;13(12). doi:10.1371/journal.ppat.1006758
Khamina, K., Lercher, A., Caldera, M., Schliehe, C., Vilagos, B., Sahin, M., … Bergthaler, A. (2017). Characterization of host proteins interacting with the lymphocytic choriomeningitis virus L protein. PLoS Pathogens, 13(12). https://doi.org/10.1371/journal.ppat.1006758
Khamina, Kseniya, Alexander Lercher, Michael Caldera, Christopher Schliehe, Bojan Vilagos, Mehmet Sahin, Lindsay Kosack, et al. “Characterization of Host Proteins Interacting with the Lymphocytic Choriomeningitis Virus L Protein.” PLoS Pathogens 13, no. 12 (2017). https://doi.org/10.1371/journal.ppat.1006758.
K. Khamina et al., “Characterization of host proteins interacting with the lymphocytic choriomeningitis virus L protein,” PLoS Pathogens, vol. 13, no. 12, 2017.
Khamina K, Lercher A, Caldera M, Schliehe C, Vilagos B, Sahin M, Kosack L, Bhattacharya A, Májek P, Stukalov A, Sacco R, James L, Pinschewer D, Bennett K, Menche J, Bergthaler A. 2017. Characterization of host proteins interacting with the lymphocytic choriomeningitis virus L protein. PLoS Pathogens. 13(12).
Khamina, Kseniya, et al. “Characterization of Host Proteins Interacting with the Lymphocytic Choriomeningitis Virus L Protein.” PLoS Pathogens, vol. 13, no. 12, e1006758, Public Library of Science, 2017, doi:10.1371/journal.ppat.1006758.
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