Abstract
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.
Copyright © 2015, American Society for Microbiology. All Rights Reserved.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Amino Acid Sequence
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Animals
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Cell Line
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Cricetulus
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Crystallography, X-Ray
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Dengue Virus / chemistry*
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Dengue Virus / genetics
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Dengue Virus / metabolism
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Gene Expression
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Humans
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Molecular Dynamics Simulation
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Molecular Sequence Data
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Mutation
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Protein Structure, Secondary
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Protein Structure, Tertiary
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RNA, Viral / chemistry*
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RNA, Viral / metabolism
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Recombinant Proteins / chemistry
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Recombinant Proteins / genetics
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Recombinant Proteins / metabolism
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Sequence Alignment
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Viral Nonstructural Proteins / chemistry*
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Viral Nonstructural Proteins / genetics
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Viral Nonstructural Proteins / metabolism
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Virus Replication / physiology*
Substances
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NS5 protein, dengue virus
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RNA, Viral
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Recombinant Proteins
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Viral Nonstructural Proteins