Detection of CPSF6 in Biomolecular Condensates as a Reporter of HIV-1 Nuclear Import.
Methods Mol Biol
; 2807: 127-138, 2024.
Article
in En
| MEDLINE
| ID: mdl-38743225
ABSTRACT
The initial stages of HIV-1 infection involve the transport of the viral core into the nuclear compartment. The presence of the HIV-1 core in the nucleus triggers the translocation of CPSF6/CPSF5 from paraspeckles into nuclear speckles, forming puncta-like structures. While this phenomenon is well-documented, the efficiency of CPSF6 translocation to nuclear speckles upon HIV-1 infection varies depending on the type of cell used. In some human cell lines, only 1-2% of the cells translocate CPSF6 to nuclear speckles when exposed to a 95% infection rate. To address the issue that only 1-2% of cells translocate CPSF6 to nuclear speckles when a 95% infection rate is achieved, we screened several human cell lines and identified a human a cell line in which approximately 85% of the cells translocate CPSF6 to nuclear speckles when 95% infection rate is achieved. This cellular system has enabled the development of a robust fluorescence microscopy method to quantify the translocation of CPSF6 into nuclear speckles following HIV-1 infection. This assay holds the potential to support studies aimed at understanding the role of CPSF6 translocation to nuclear speckles in HIV-1 infection. Additionally, since the translocation of CPSF6 into nuclear speckles depends on the physical presence of the viral core in the nucleus, our method also serves as a reporter of HIV-1 nuclear import.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Cell Nucleus
/
HIV-1
/
Active Transport, Cell Nucleus
/
MRNA Cleavage and Polyadenylation Factors
Limits:
Humans
Language:
En
Journal:
Methods Mol Biol
Journal subject:
BIOLOGIA MOLECULAR
Year:
2024
Document type:
Article
Affiliation country:
Estados Unidos