Specific Interaction of DARPin with HIV-1 CANTD Disturbs the Distribution of Gag, RNA Packaging, and Tetraspanin Remodelling in the Membrane

A designed repeat scaffold protein (AnkGAG1D4) recognizing the human immunodeficiency virus-1 (HIV-1) capsid (CA) was formerly established with antiviral assembly. Here, we investigated the molecular mechanism of AnkGAG1D4 function during the late stages of the HIV-1 replication cycle. By applying s...

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Bibliographic Details
Published in:Viruses 2022-04, Vol.14 (4), p.824
Main Authors: Moonmuang, Sutpirat, Maniratanachote, Rawiwan, Chetprayoon, Paninee, Sornsuwan, Kanokporn, Thongkum, Weeraya, Chupradit, Koollawat, Tayapiwatana, Chatchai
Format: Article
Language:English
Subjects:
Acquired immune deficiency syndrome
AIDS
ankyrin
Antiviral activity
CD81 antigen
Encapsidation
Flow cytometry
Gag polyprotein
Gag protein
HIV
HIV-1
Human immunodeficiency virus
Life cycles
Packaging
Peptides
Polymerase chain reaction
Polymerization
Producer cells
Proteins
RNA-directed DNA polymerase
tetraspanin
virus assembly inhibitor
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Summary:A designed repeat scaffold protein (AnkGAG1D4) recognizing the human immunodeficiency virus-1 (HIV-1) capsid (CA) was formerly established with antiviral assembly. Here, we investigated the molecular mechanism of AnkGAG1D4 function during the late stages of the HIV-1 replication cycle. By applying stimulated emission-depletion (STED) microscopy, Gag polymerisation was interrupted at the plasma membrane. Disturbance of Gag polymerisation triggered Gag accumulation inside producer cells and trapping of the CD81 tetraspanin on the plasma membrane. Moreover, reverse transcriptase-quantitative polymerase chain reaction (RT-qPCR) experiments were performed to validate the packaging efficiency of RNAs. Our results advocated that AnkGAG1D4 interfered with the Gag precursor protein from selecting HIV-1 and cellular RNAs for encapsidation into viral particles. These findings convey additional information on the antiviral activity of AnkGAG1D4 at late stages of the HIV-1 life cycle, which is potential for an alternative anti-HIV molecule.
ISSN:1999-4915
1999-4915
DOI:10.3390/v14040824