Pol
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gag-pol
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LEDGF/p75 is recruited to HIV-1 particles through its direct interaction with the IN domain of Pol |
PubMed
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gag-pol
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HIV-1 Pol is identified to have a physical interaction with PC4 and SFRS1 interacting protein 1 (PSIP1; p75/LEDGF) in human HEK293 and/or Jurkat cell lines by using affinity tagging and purification mass spectrometry analyses |
PubMed
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Rev
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rev
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Rev 35-50, Rev 75-84, LEDGF 361-370, and LEDGF 402-411 peptides can specifically prevent formation of the Rev-LEDGF/p75 complex |
PubMed
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rev
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HIV-1 Rev interacts with LEDGF/p75 to promote dissociation of HIV-1 IN-LEDGF/p75 complex |
PubMed
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capsid
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gag
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LEDGF/p75 is incorporated in HIV-1 particles, and fractionates with HIV-1 CA and IN viral proteins in velocity gradient purification assay |
PubMed
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gag
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HIV-1 CA mutant N74D and depletion of NUP153 and LEDGF/p75 significantly reduce HIV-1 DNA integration into gene-rich regions of chromosomes and gene bodies |
PubMed
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gag
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HIV-1 CA mutants, including Q63A/Q67A, N74D, G89V, P90A, and A92E, are less dependent on LEDGF/p75 than the wild type CA in infectivity |
PubMed
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integrase
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gag-pol
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HIV-1 Integrase interacts with PSIP1 (LEDGF/p75) to determine the site of integration |
PubMed
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gag-pol
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PSIP1 (LEDGF/p75) L368A mutant demonstrates reduced binding to HIV-1 IN |
PubMed
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gag-pol
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PSIP1 (LEDGF/p75) K407D mutation increases binding to HIV-1 IN |
PubMed
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gag-pol
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The IN catalytic core domain has a higher binding affinity (Kd) for PSIP1 (LEDGF/p75) than the physiological binding partners, CDCA7L (JOP2), POGZ, KMT2A (MML1) and IWS1 |
PubMed
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gag-pol
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The HIV IN interaction site on the PSIP1 (LEDGF/p75) intergrase binding domain (IBD) overlaps with that of POGZ, JPO2 and KMT2A (MLL1) |
PubMed
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gag-pol
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A domesticated transposase, POGZ, carries a DDE domain (amino acids 1117-1323) and interacts with LEDGF/p75. HIV-1 IN is efficient in displacing POGZ from LEDGF/p75 |
PubMed
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gag-pol
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The interaction of HIV-1 integrase with LEDGF/p75 accounts for the karyophilic properties and chromosomal targeting of integrase, which co-localizes with LEDGF/p75 in the nuclei of human cells |
PubMed
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gag-pol
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LEDGF/p75 complexes with HIV-1 integrase and stimulates integrase strand transfer activity in vitro |
PubMed
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gag-pol
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LEDGF/p75 is incorporated in HIV-1 particles, and fractionates with HIV-1 CA and IN viral proteins in velocity gradient purification assay |
PubMed
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gag-pol
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LEDGF/p75 is recruited to HIV-1 particles through its direct interaction with the IN domain of Pol |
PubMed
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gag-pol
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LEDGINs are novel allosteric HIV-1 IN inhibitors, which inhibit the catalytic activity of IN, abrogate the interaction between LEDGF/p75 and IN, and enhance IN oligomerization in viral particles |
PubMed
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gag-pol
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HIV-1 IN mutant K42E reduces its ability of binding to LEDGF/p75, whereas HIV-1 IN mutants EE10/13RR and EEE6/10/13RRE abolish to bind a detectable level of LEDGF/p75 |
PubMed
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gag-pol
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Small molecules are identified to inhibit HIV-1 IN dimerization, IN/viral DNA assembly, and/or IN/LEDGF interaction |
PubMed
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gag-pol
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(E)-3-(2-chlorophenyl)-1-(2,4-dihydroxyphenyl)prop-2-en-1-one (NPD170) shows the antiviral activity by blocking the binding of transfected IN to endogenous LEDGF/p75 in cells |
PubMed
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gag-pol
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N-(cyclohexylmethyl)-2,3-dihydroxy-5-(piperidin-1-ylsulfonyl) benzamide (5u) inhibits the HIV-1 IN-LEDGF/p75 interaction |
PubMed
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gag-pol
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2-(quinolin-3-yl) acetic acid derivatives inhibit the IN-LEDGF interaction in vitro and impair HIV-1 replication in infected cells. |
PubMed
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gag-pol
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Studies on integrase strand transfer activity in vitro show that LEDGF/p75 only binds HIV-1 integrase before the latter binds donor DNA, whereas donor DNA engages either free or LEDGF/p75-bound integrase |
PubMed
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gag-pol
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LEDGF/p75 interferes with HIV-1 integrase (IN) full-site product formation by competing for HIV-1 IN dimer-dimer interactions or interfering with assembled synaptic complexes that harbor a single integrated end |
PubMed
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gag-pol
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LEDGF strongly stabilizes HIV-1 integrase-LEDGF/p75 interactions and promotes IN tetramerization |
PubMed
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gag-pol
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LEDGF/p75 binds to HIV-1 integrase (IN) and tethers IN to chromatin; the N-terminal PWWP domain (residues 1-93) in LEDGF/p75, and its beta-barrel substructure (first 63 residues) are required for chromatin binding and IN tethering to chromatin |
PubMed
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gag-pol
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The N-terminal zinc binding domain (amino acids 1-52) and the central core domain (amino acids 53-212) of HIV-1 integrase are involved in the interaction with LEDGF/p75, with the core domain harboring the main determinant for interaction |
PubMed
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gag-pol
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The NMR structure of the integrase-binding domain (IBD) in LEDGF/p75 reveals that residues Ile365, Asp366, or Phe406 in LEDGF/p75 mediate binding to HIV-1 integrase, and amino acids 165-173 of HIV-1 integrase are involved in the binding to LEDGF/p75 |
PubMed
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gag-pol
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A single mutation at residue Q168 of HIV-1 integrase disrupts its interaction with LEDGF/p75 and results in defective HIV-1 replication |
PubMed
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gag-pol
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HIV-1 IN K264A/K266A mutant exhibits wild-type level of LEDGF/p75 binding, whereas A128T mutant displays slightly reduced binding to the cellular cofactor |
PubMed
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gag-pol
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Enhanced nuclear accumulation of HIV-1 IN in mouse MEF cells expressing human LEDGF/p75 suggests LEDGF/p75 stably transports the viral protein to chromatin |
PubMed
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gag-pol
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Molecular modeling study demonstrates that the LEDGF/p75 integrase binding domain residues Ile365, Asp366, Phe406 and Val408 have significant contributions to the binding of LEDGF/p75 to HIV1 IN |
PubMed
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gag-pol
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Depletion of LEDGF/p75 leads to the accumulation of HIV-1 IN complex, which contains tetramers of IN exclusively in nuclear. IN Q168A mutant fails to accumulate in a nuclear low molecular weight complex |
PubMed
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gag-pol
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Mass spectrometry and Fluorescence Correlation Spectroscopy analyses show a stable complex between HIV-1 IN, viral U5 DNA, LEDGF/p75, and the integrase binding domain (amino acids 174-289) of INI1 with a 4/2/2/2 stoichiometry |
PubMed
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gag-pol
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Knockdown of HRP-2 by siRNA in LEDGF/p75-depleted cells reduces integration frequency in transcription units and shifts the integration distribution towards random |
PubMed
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gag-pol
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HRP-2 functions as a co-factor of HIV-1 IN in LEDGF/p75-depleted cells. HRP-2 overexpression rescues HIV-1 replication and restored integration in genes to wild-type levels |
PubMed
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gag-pol
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The NLS (amino acids 148-156) and AT-hook like domains (amino acids 178-197) constitute important contributions to enhance the binding of HIV-1 Integrase (IN) to DNA |
PubMed
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gag-pol
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Three peptides (354-378, 360-370, 400-413) derived from the IBD of LEDGF compete with LEDGF binding to HIV-1 IN. LEDGF-354-378 peptide shows the strongest binding competition |
PubMed
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gag-pol
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In LEDGF/p75 knock-down cells, there is an increase in ubiquitinated HIV-1 integrase, which is found exclusively in the cytoplasm of these cells, and protection of HIV-1 integrase from the proteasome requires only interaction with LEDGF/p75 |
PubMed
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gag-pol
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Using a pull-down assay, LEDGF/p75 interacts with HIV-1, HIV-2, and FIV integrases and strongly promotes the binding of HIV-1 integrase to DNA in vitro |
PubMed
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gag-pol
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HIV-1 integrase (IN) increases the binding strength of LEDGF/p75 deltaPWWP to chromatin, which requires the direct interaction of these two proteins. Integrase fails to increase chromatin binding of a LEDGF/p75 deltaPWWP/AT mutant |
PubMed
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gag-pol
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HIV-1 IN mutant K264E supports the wild-type level of concerted integration activity and the efficient integration of endogenous viral DNA in vitro in the presence of LEDGF/p75 |
PubMed
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gag-pol
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The triple mutant RRK262/3/4/EEE in HIV-1 IN still maintains wild type levels of binding with LEDGF/p75 |
PubMed
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gag-pol
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LEDGF-derived peptides inhibit HIV-1 IN binding to DNA by shifting its oligomerization equilibrium toward the tetramer. The LEDGF peptides inhibit HIV-1 replication in cell culture by eliminating viral DNA integration |
PubMed
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gag-pol
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The 146-156 amino acid stretch of LEDGF/p75 is critical for nuclear localization and a single amino acid mutation at K150A in LEDGF/p75 renders HIV-1 integrase cytoplasmic |
PubMed
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gag-pol
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Two LEDGF mutants (K401E/K402S/R405E and K401E/K402E/R405E) fail to interact with HIV-1 IN. The IN mutant (D6K/E10K/E13K) complements the interaction with the LEDGF mutant (K401E/K402E/R405E) |
PubMed
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gag-pol
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Replacing the N-terminal domain ensemble (NDE) of IN with strongly divergent chromatin-binding modules (i.e. H1 or KSHV LANA) can rescue integrase tethering and HIV-1 integration in LEDGF/p75-deficient cells |
PubMed
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gag-pol
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A serine cluster (residues 271, 273, and 275) in LEDGF/p75 is phosphorylated by protein kinase casein kinase 2 (PKCK2). S271/273/275A mutant impairs LEDGF/p75-mediate HIV-1 DNA integration without altering IN and chromatin binding |
PubMed
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gag-pol
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Alanine scan, fluorescence anisotropy studies, homology modeling and NMR demonstrate that all residues in LEDGF 361-370 contribute to IN binding and inhibition. Kinetic studies in cells show direct inhibition of viral cDNA integration by LEDGF 361-370 |
PubMed
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gag-pol
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A bi-helix motif (residues 149-186) in HIV-1 IN consists of the alpha(4) and alpha(5) helices connected by a 3 to 5-residue turn and binds to the LTR ends of virus DNA and to the IN binding domain (IBD) but not the IBD-Asp366Asn variant of LEDGF |
PubMed
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gag-pol
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HIV-1 integrase (IN) and JPO2 bind mutually exclusively to LEDGF/p75. Two LEDGF/p75 mutants (I365A and D366N) abrogate interaction between LEDGF/p75 and IN but interact with JPO2 to the same extent as wild-type LEDGF/p75 |
PubMed
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gag-pol
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HIV-1 integration in cells depleted for LEDGF/p75 is less frequent in transcription units, less frequent in genes regulated by LEDGF/p75 and more frequent in GC-rich DNA |
PubMed
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gag-pol
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Results from molecular dynamics simulations show residues Gln168, Glu170 and Thr174 in chain A of HIV-1 Integrase (IN), Thr125 and Trp131 in chain B of IN as well as Ile365, Asp366, Phe406 and Val408 in LEDGF/p75 are responsible for IN-LEDGF/p75 binding |
PubMed
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gag-pol
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HIV-1 IN mutants (V165A, A179P, and KR186,7AA) exhibit no chromatin-binding ability and fails to interact with LEDGF/p75 |
PubMed
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gag-pol
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HIV-1 Rev interacts with LEDGF/p75 to promote dissociation of HIV-1 IN-LEDGF/p75 complex |
PubMed
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gag-pol
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Mass spectrometry analysis shows a stable complex between human LEDGF/p75 and HIV-1 IN with a stoichiometry of 2 LEDGF/p75 and 4 IN |
PubMed
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gag-pol
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The C-terminal domain of HIV-1 IN is masked in the presence of LEDGF/p75 protein in cell lysates, suggesting a structural rearrangement or oligomerization of IN |
PubMed
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gag-pol
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HIV-1 IN mutants (H171A, L172A, and EH170,1AA), located between the alpha4 and alpha5 helices of IN, severely impair the interaction with LEDGF/p75 but are still able to bind chromatin, suggesting IN-mediated LEDGF-independent chromatin targeting |
PubMed
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gag-pol
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Multiangle light scattering and small angle x-ray scattering analysis indicate full-length IN (wild-type and C56S/F139D/F185H/C280S mutant) and LEDGF/p75 (amino acids 325-530) form a tetramer complex with stoichiometry 4:4 |
PubMed
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gag-pol
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Multiangle light scattering and small angle x-ray scattering analysis indicate full-length IN (C56S/F139D/F185H/C280S) and LEDGF/p75 (amino acids 347-471) form a tetramer, where each IN dimer binds only one LEDGF/p75 |
PubMed
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gag-pol
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Analytical ultracentrifugation indicates IN (amino acids 1-212) and LEDGF/p75 (amino acids 347-471) form a complex with a molecular weight consistent with a 2:2 complex |
PubMed
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gag-pol
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Overexpression of the integrase binding domain (IBD) of LEDGF/p75 severely inhibits HIV-1 replication, while no inhibition is observed in cell lines overexpressing the interaction-deficient D366A mutant of integrase |
PubMed
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gag-pol
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A single mutation at residue A128 or H171 of HIV-1 integrase diminishes its interaction with LEDGF/p75 |
PubMed
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gag-pol
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Intensified RNA interference and dominant-negative protein approaches show that LEDGF/p75 is an essential linkage between HIV-1 integrase and chromatin |
PubMed
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gag-pol
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T-cell lines expressing a C-terminal fragment (residues 325-530) of LEDGF/p75 exhibit a reduced affinity of integrase for LEDGF/p75 and the blockage of viral replication. Both A128T and E170G IN mutations are together sufficient for viral rescue |
PubMed
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retropepsin
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gag-pol
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HIV-1 PR cleaves LEDGF/p75 at amino-acid positions 110-111, 159-160, 357-358, and 433-434 in HIV-1 particles |
PubMed
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