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  • Undergraduate Student
  • Veterinary
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  • Deputy Head of Facility
  • Director of Center
  • Director of Department
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© Research
Publication : Viruses

Uncovering Flavivirus Host Dependency Factors through a Genome-Wide Gain-of-Function Screen.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Viruses - 15 Jan 2019

Petrova E, Gracias S, Beauclair G, Tangy F, Jouvenet N,

Link to Pubmed [PMID] – 30650657

Link to DOI – E6810.3390/v11010068

Viruses 2019 01; 11(1):

Flaviviruses, such as dengue (DENV), West Nile (WNV), yellow fever (YFV) and Zika (ZIKV) viruses, are mosquito-borne pathogens that present a major risk to global public health. To identify host factors that promote flavivirus replication, we performed a genome-wide gain-of-function cDNA screen for human genes that enhance the replication of flavivirus reporter particles in human cells. The screen recovered seventeen potential host proteins that promote viral replication, including the previously known dolichyl-diphosphooligosaccharide–protein glycosyltransferase non-catalytic subunit (DDOST). Using silencing approaches, we validated the role of four candidates in YFV and WNV replication: ribosomal protein L19 (RPL19), ribosomal protein S3 (RPS3), DDOST and importin 9 (IPO9). Applying a panel of virological, biochemical and microscopic methods, we validated further the role of RPL19 and DDOST as host factors required for optimal replication of YFV, WNV and ZIKV. The genome-wide gain-of-function screen is thus a valid approach to advance our understanding of flavivirus replication.