UMMS Affiliation

Program in Molecular Medicine; Graduate School of Biomedical Sciences

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Amino Acids, Peptides, and Proteins | Biochemistry | Enzymes and Coenzymes | Immunology and Infectious Disease | Molecular Biology | Molecular Genetics | Virology


Tripartite motif-containing protein 5alpha (TRIM5alpha) is a cellular antiviral restriction factor that prevents early events in retrovirus replication. The activity of TRIM5alpha is thought to be limited to retroviruses as a result of highly specific interactions with capsid lattices. In contrast to this current understanding, we show that both human and rhesus macaque TRIM5alpha suppress replication of specific flaviviruses. Multiple viruses in the tick-borne encephalitis complex are sensitive to TRIM5alpha-dependent restriction, but mosquito-borne flaviviruses, including yellow fever, dengue, and Zika viruses, are resistant. TRIM5alpha suppresses replication by binding to the viral protease NS2B/3 to promote its K48-linked ubiquitination and proteasomal degradation. Importantly, TRIM5alpha contributes to the antiviral function of IFN-I against sensitive flaviviruses in human cells. Thus, TRIM5alpha possesses remarkable plasticity in the recognition of diverse virus families, with the potential to influence human susceptibility to emerging flaviviruses of global concern.


TRIM5α, flavivirus, interferon, interferon stimulated genes, restriction factor, retrovirus, tick-borne encephalitis virus

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This is an open access article under the CC BY license (

DOI of Published Version



Cell Rep. 2019 Jun 11;27(11):3269-3283.e6. doi: 10.1016/j.celrep.2019.05.040. Link to article on publisher's site

Journal/Book/Conference Title

Cell reports

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Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.