The mosquito protein AEG12 displays both cytolytic and antiviral properties via a common lipid transfer mechanism.
Proc Natl Acad Sci U S A
; 118(11)2021 03 16.
Article
in English
| MEDLINE | ID: covidwho-1125727
ABSTRACT
The mosquito protein AEG12 is up-regulated in response to blood meals and flavivirus infection though its function remained elusive. Here, we determine the three-dimensional structure of AEG12 and describe the binding specificity of acyl-chain ligands within its large central hydrophobic cavity. We show that AEG12 displays hemolytic and cytolytic activity by selectively delivering unsaturated fatty acid cargoes into phosphatidylcholine-rich lipid bilayers. This property of AEG12 also enables it to inhibit replication of enveloped viruses such as Dengue and Zika viruses at low micromolar concentrations. Weaker inhibition was observed against more distantly related coronaviruses and lentivirus, while no inhibition was observed against the nonenveloped virus adeno-associated virus. Together, our results uncover the mechanistic understanding of AEG12 function and provide the necessary implications for its use as a broad-spectrum therapeutic against cellular and viral targets.
Keywords
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Antiviral Agents
/
Insect Proteins
/
Hemolytic Agents
/
Lipids
Limits:
Animals
/
Humans
Language:
English
Year:
2021
Document Type:
Article
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