Journal
JOURNAL OF VIROLOGY
Volume 89, Issue 20, Pages 10717-10721Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/JVI.01239-15
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Funding
- NMRC [NMRC/1315/2011, NMRC/CBRG/0073/2014]
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We examined the function of the conserved Val/Ile residue within the dengue virus NS5 interdomain linker (residues 263 to 272) by site-directed mutagenesis. Gly substitution or Gly/Pro insertion after the conserved residue increased the linker flexibility and created slightly attenuated viruses. In contrast, Pro substitution abolished virus replication by imposing rigidity in the linker and restricting NS5's conformational plasticity. Our biochemical and reverse genetics experiments demonstrate that NS5 utilizes conformational regulation to achieve optimum viral replication.
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