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MedChemExpress haloprotac3

<t>HaloPROTAC3</t> efficiently binds Halotag and HaloG3BP1 fusion proteins. ( A ) Chemical structure of HaloPROTAC3 and the enantiomeric form ent -HaloPROTAC3; the scheme indicates the warhead-binding VHL E3 ubiquitin ligase <t>(VH285)</t> and the chloroalkene moiety-binding Halotag (generated using Marvin JS 22.11.1, web-based chemical sketch tool by Chemaxon). ( B ) BV2 ΔG3BP1 + HaloG3 BP1 cells were treated with the indicated concentrations of HaloPROTAC3 for 48 h, and metabolic cell death was measured using CellTiter-Blue. Cell death was calculated as relative to the DMSO control, and CC 50 is indicated by a dotted line. ( C–E ) BV2 + Halotag, BV2 ΔG3BP1 + Halotag, or BV2 ΔG3BP1 + HaloG3 BP1 cells treated with the indicated concentrations of HaloPROTAC3 for 48 h were subjected to flow cytometry analysis after incubation for 2 h with the fluorescent ligand Halotag Janelia 647. ( C ) Gating strategy of Halotag + cells in the live cell population. ( D ) Representative histograms and ( E ) dose-response curves of the quantified percentage of Halotag + cells. The corresponding curve fitting parameters for each cell line are shown.

Haloprotac3, supplied by MedChemExpress, used in various techniques. Bioz Stars score: 94/100, based on 2 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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1) Product Images from "Proof of concept: targeted protein degradation of the stress granules component G3BP1 as an antiviral strategy against norovirus infection"

Article Title: Proof of concept: targeted protein degradation of the stress granules component G3BP1 as an antiviral strategy against norovirus infection

Journal: Antimicrobial Agents and Chemotherapy

doi: 10.1128/aac.01118-25

HaloPROTAC3 efficiently binds Halotag and HaloG3BP1 fusion proteins. ( A ) Chemical structure of HaloPROTAC3 and the enantiomeric form ent -HaloPROTAC3; the scheme indicates the warhead-binding VHL E3 ubiquitin ligase (VH285) and the chloroalkene moiety-binding Halotag (generated using Marvin JS 22.11.1, web-based chemical sketch tool by Chemaxon). ( B ) BV2 ΔG3BP1 + HaloG3 BP1 cells were treated with the indicated concentrations of HaloPROTAC3 for 48 h, and metabolic cell death was measured using CellTiter-Blue. Cell death was calculated as relative to the DMSO control, and CC 50 is indicated by a dotted line. ( C–E ) BV2 + Halotag, BV2 ΔG3BP1 + Halotag, or BV2 ΔG3BP1 + HaloG3 BP1 cells treated with the indicated concentrations of HaloPROTAC3 for 48 h were subjected to flow cytometry analysis after incubation for 2 h with the fluorescent ligand Halotag Janelia 647. ( C ) Gating strategy of Halotag + cells in the live cell population. ( D ) Representative histograms and ( E ) dose-response curves of the quantified percentage of Halotag + cells. The corresponding curve fitting parameters for each cell line are shown.

Figure Legend Snippet: HaloPROTAC3 efficiently binds Halotag and HaloG3BP1 fusion proteins. ( A ) Chemical structure of HaloPROTAC3 and the enantiomeric form ent -HaloPROTAC3; the scheme indicates the warhead-binding VHL E3 ubiquitin ligase (VH285) and the chloroalkene moiety-binding Halotag (generated using Marvin JS 22.11.1, web-based chemical sketch tool by Chemaxon). ( B ) BV2 ΔG3BP1 + HaloG3 BP1 cells were treated with the indicated concentrations of HaloPROTAC3 for 48 h, and metabolic cell death was measured using CellTiter-Blue. Cell death was calculated as relative to the DMSO control, and CC 50 is indicated by a dotted line. ( C–E ) BV2 + Halotag, BV2 ΔG3BP1 + Halotag, or BV2 ΔG3BP1 + HaloG3 BP1 cells treated with the indicated concentrations of HaloPROTAC3 for 48 h were subjected to flow cytometry analysis after incubation for 2 h with the fluorescent ligand Halotag Janelia 647. ( C ) Gating strategy of Halotag + cells in the live cell population. ( D ) Representative histograms and ( E ) dose-response curves of the quantified percentage of Halotag + cells. The corresponding curve fitting parameters for each cell line are shown.

Techniques Used: Binding Assay, Ubiquitin Proteomics, Generated, Control, Flow Cytometry, Incubation

HaloPROTA3 degrades Halotag and HaloG3BP1 fusion proteins. ( A–E ) Protein samples from BV2 + Halotag, ΔG3BP1 + Halotag, or ΔG3BP1 + HaloG3 BP1 cells treated for either 24 h or 48 h with HaloPROTAC3 or ent -HaloPROTAC3 were subjected to Western blot analysis using antibodies against Halotag, G3BP1, or GAPDH. ( A ) Representative Western blots and ( B ) quantification of the Halotag protein expression in cells treated with HaloPROTAC3 normalized to GAPDH. ( C ) BV2 ΔG3BP1 + HaloG3 BP1 cells treated for 48 h with either 1.2 µM of HaloPROTAC3 or the indicated concentrations of ent -HaloPROTAC3 were subjected to flow cytometry analysis, as stated in . Data is expressed as mean ± standard error of the mean with ∗∗∗∗ indicating P ≤ 0.0001. ( D ) Representative Western blots and ( E ) quantification of the Halotag protein expression in cells treated with ent- HaloPROTAC3 normalized to GAPDH.

Figure Legend Snippet: HaloPROTA3 degrades Halotag and HaloG3BP1 fusion proteins. ( A–E ) Protein samples from BV2 + Halotag, ΔG3BP1 + Halotag, or ΔG3BP1 + HaloG3 BP1 cells treated for either 24 h or 48 h with HaloPROTAC3 or ent -HaloPROTAC3 were subjected to Western blot analysis using antibodies against Halotag, G3BP1, or GAPDH. ( A ) Representative Western blots and ( B ) quantification of the Halotag protein expression in cells treated with HaloPROTAC3 normalized to GAPDH. ( C ) BV2 ΔG3BP1 + HaloG3 BP1 cells treated for 48 h with either 1.2 µM of HaloPROTAC3 or the indicated concentrations of ent -HaloPROTAC3 were subjected to flow cytometry analysis, as stated in . Data is expressed as mean ± standard error of the mean with ∗∗∗∗ indicating P ≤ 0.0001. ( D ) Representative Western blots and ( E ) quantification of the Halotag protein expression in cells treated with ent- HaloPROTAC3 normalized to GAPDH.

Techniques Used: Western Blot, Expressing, Flow Cytometry

Degradation of G3BP1 using HaloPROTAC3 shows antiviral activity against norovirus. BV2 ΔG3BP1 + HaloG3 BP1 cells were treated for 48 h with the shown concentrations of HaloPROTA3 and infected with MNV1. After 1 h of virus adsorption, the virus inoculum was removed, and HaloPROTAC3 was re-added to the cell culture medium for the remaining infection time. ( A ) Scheme of the experimental setup of the antiviral assays. ( B–D ) Cells infected with MOI 1 TCID 50 /cell for 16 h were incubated with fluorescent ligand Halotag Janelia 647 for 2 h, harvested, and stained with anti-dsRNA antibody to assess the percentage of infection. Cells were then subjected to flow cytometry analysis. ( B ) Gating strategy showing first the duplet exclusion for selection of single cells, followed by dead cell exclusion within the single-cell population. Halotag + cells and dsRNA + cells were gated exclusively from the live cell population. ( C ) Quantification of the percentage of Halotag + and ( D ) dsRNA + (infected) cells across HaloPROTAC3 concentrations. ( E ) Total RNA was isolated from cells infected with MOI 1 TCID 50 /cell for 10 h and used to quantify the levels of viral RNA (expressed as vRNA copies/µg RNA, normalized to the DMSO control), by RT-qPCR. ( F ) Extracellular infectious virus yield in supernatants from cells infected with MOI 1 TCID 50 /cell for 16 h and treated with the indicated concentrations of HaloPROTAC3 was quantified by TCID 50 in BV2 cells. ( G, H ) Infection-induced cell death was detected using the NIR dye measured in the live-cell imaging IncuCyte system. ( G ) Representative pictures after 24 h.p.i.; NIR + cells are shown in blue. ( H ) Quantification of the total number of NIR + cells for the shown HaloPROTAC3 concentrations. Data is expressed as mean ± standard error of the mean with ∗ , ∗∗ , ∗∗∗ , and ∗∗∗∗ indicating P ≤ 0.05, P ≤ 0.01, P ≤ 0.001, and P ≤ 0.0001 respectively.

Figure Legend Snippet: Degradation of G3BP1 using HaloPROTAC3 shows antiviral activity against norovirus. BV2 ΔG3BP1 + HaloG3 BP1 cells were treated for 48 h with the shown concentrations of HaloPROTA3 and infected with MNV1. After 1 h of virus adsorption, the virus inoculum was removed, and HaloPROTAC3 was re-added to the cell culture medium for the remaining infection time. ( A ) Scheme of the experimental setup of the antiviral assays. ( B–D ) Cells infected with MOI 1 TCID 50 /cell for 16 h were incubated with fluorescent ligand Halotag Janelia 647 for 2 h, harvested, and stained with anti-dsRNA antibody to assess the percentage of infection. Cells were then subjected to flow cytometry analysis. ( B ) Gating strategy showing first the duplet exclusion for selection of single cells, followed by dead cell exclusion within the single-cell population. Halotag + cells and dsRNA + cells were gated exclusively from the live cell population. ( C ) Quantification of the percentage of Halotag + and ( D ) dsRNA + (infected) cells across HaloPROTAC3 concentrations. ( E ) Total RNA was isolated from cells infected with MOI 1 TCID 50 /cell for 10 h and used to quantify the levels of viral RNA (expressed as vRNA copies/µg RNA, normalized to the DMSO control), by RT-qPCR. ( F ) Extracellular infectious virus yield in supernatants from cells infected with MOI 1 TCID 50 /cell for 16 h and treated with the indicated concentrations of HaloPROTAC3 was quantified by TCID 50 in BV2 cells. ( G, H ) Infection-induced cell death was detected using the NIR dye measured in the live-cell imaging IncuCyte system. ( G ) Representative pictures after 24 h.p.i.; NIR + cells are shown in blue. ( H ) Quantification of the total number of NIR + cells for the shown HaloPROTAC3 concentrations. Data is expressed as mean ± standard error of the mean with ∗ , ∗∗ , ∗∗∗ , and ∗∗∗∗ indicating P ≤ 0.05, P ≤ 0.01, P ≤ 0.001, and P ≤ 0.0001 respectively.

Techniques Used: Activity Assay, Infection, Virus, Adsorption, Cell Culture, Incubation, Staining, Flow Cytometry, Selection, Single Cell, Isolation, Control, Quantitative RT-PCR, Live Cell Imaging

Degradation of G3BP1 is required for HaloPROTAC3 antiviral activity. ( A, B ) BV2 ΔG3BP1 + HaloG3 BP1 cells were treated for 48 h with 1.2 µM of HaloPROTAC3 or ent -HaloPROTAC3, as indicated, and infected with MNV1. After 1 h of virus adsorption, the virus inoculum was removed and PROTACs re-added to the cell culture medium. ( A ) Extracellular infectious virus yield in supernatants from cells infected with MOI 1 TCID 50 /cell for 16 h and treated with either HaloPROTAC3 or ent -HALOPROTAC3 was quantified by TCID 50 in BV2 cells. ( B ) Infection-induced cell death was detected using the NIR dye measured in the live-cell imaging IncuCyte system. Shown is the quantification of the total number of NIR + cells for cells treated with either HaloPROTAC3 or ent -HaloPROTACs, measured every 3 h and followed for a total of 72 h.p.i. ( C–F ) BV2 ΔG3BP1 + HaloG3 BP1 cells were concomitantly treated for 48 h with 1.2 µM of HaloPROTAC3 and VH032 in the indicated concentrations. ( C ) Metabolic cell death was measured using CellTiter-Blue. Cell death was calculated as relative to the DMSO control. A concentration of 75 µM of VH032 is indicated by a dotted line. ( D ) Protein samples from cells treated for either 24 or 48 h with the indicated concentrations of HaloPROTAC3 and VH032 were subjected to Western blot analysis using antibodies directed Halotag or GAPDH. Bar plot shows the quantification of the Halotag protein bands from three independent experiments for all the experimental conditions. ( E ) Cells were infected with MOI 1 TCID 50 /cell of MNV1. After 1 h of virus adsorption, the virus inoculum was removed and drugs re-added to the cell culture medium. Infection-induced cell death was detected using the NIR dye measured in the live-cell imaging IncuCyte system, as stated in B . Shown is the quantification of the total number of NIR + cells measured after 24 h.p.i. ( F ) Extracellular infectious virus yield quantified by TCID 50 in BV2 cells from supernatants of cells infected with MOI 1 TCID 50 /cell for 16 h and treated with 1.2 µM of HaloPROTAC3 and 30 µM of VH032. Data is expressed as mean ± standard error of the mean with ∗∗ , ∗∗∗ , and ∗∗∗∗ indicating P ≤ 0.01, P ≤ 0.001, and P ≤ 0.0001 respectively. ‘ns’ denotes non-significant.

Figure Legend Snippet: Degradation of G3BP1 is required for HaloPROTAC3 antiviral activity. ( A, B ) BV2 ΔG3BP1 + HaloG3 BP1 cells were treated for 48 h with 1.2 µM of HaloPROTAC3 or ent -HaloPROTAC3, as indicated, and infected with MNV1. After 1 h of virus adsorption, the virus inoculum was removed and PROTACs re-added to the cell culture medium. ( A ) Extracellular infectious virus yield in supernatants from cells infected with MOI 1 TCID 50 /cell for 16 h and treated with either HaloPROTAC3 or ent -HALOPROTAC3 was quantified by TCID 50 in BV2 cells. ( B ) Infection-induced cell death was detected using the NIR dye measured in the live-cell imaging IncuCyte system. Shown is the quantification of the total number of NIR + cells for cells treated with either HaloPROTAC3 or ent -HaloPROTACs, measured every 3 h and followed for a total of 72 h.p.i. ( C–F ) BV2 ΔG3BP1 + HaloG3 BP1 cells were concomitantly treated for 48 h with 1.2 µM of HaloPROTAC3 and VH032 in the indicated concentrations. ( C ) Metabolic cell death was measured using CellTiter-Blue. Cell death was calculated as relative to the DMSO control. A concentration of 75 µM of VH032 is indicated by a dotted line. ( D ) Protein samples from cells treated for either 24 or 48 h with the indicated concentrations of HaloPROTAC3 and VH032 were subjected to Western blot analysis using antibodies directed Halotag or GAPDH. Bar plot shows the quantification of the Halotag protein bands from three independent experiments for all the experimental conditions. ( E ) Cells were infected with MOI 1 TCID 50 /cell of MNV1. After 1 h of virus adsorption, the virus inoculum was removed and drugs re-added to the cell culture medium. Infection-induced cell death was detected using the NIR dye measured in the live-cell imaging IncuCyte system, as stated in B . Shown is the quantification of the total number of NIR + cells measured after 24 h.p.i. ( F ) Extracellular infectious virus yield quantified by TCID 50 in BV2 cells from supernatants of cells infected with MOI 1 TCID 50 /cell for 16 h and treated with 1.2 µM of HaloPROTAC3 and 30 µM of VH032. Data is expressed as mean ± standard error of the mean with ∗∗ , ∗∗∗ , and ∗∗∗∗ indicating P ≤ 0.01, P ≤ 0.001, and P ≤ 0.0001 respectively. ‘ns’ denotes non-significant.

Techniques Used: Activity Assay, Infection, Virus, Adsorption, Cell Culture, Live Cell Imaging, Control, Concentration Assay, Western Blot

Incubation:

Article Title: Nuclear speckles enable processing of RNA from GC-rich isochores.
Article Snippet: The eluted RNA was purified from the excess free biotin linker using MaXtract high-density phase-lock-gel tubes (Qiagen, cat. no. 129056). .. Cells were incubated for 16 hours with either: i) DMSO ii) DMSO + 1μM HaloPROTAC3 (MedChemExpress, cat ll OPEN ACCESS Cell 189, 1–16.e1–e13, April 2, 2026 e9 Please cite this article in press as: Małszycki et al., Nuclear speckles enable processing of RNA from GC-rich isochores, Cell (2026), https:// doi.org/10.1016/j.cell.2026.01.011 Article #HY-111997) iii) DMSO + 1μM dTAG13 (Tocris, cat.no 6605) or iv) 1μM HaloPROTAC3 + 1μM dTAG13. .. An equal volume of ROTIPhenol/Chloroform/Isoamyl alcohol (ROTH, cat. no. A156.1) was added to the biotinylated RNA and the mixture was added to the phase-lock-gel tubes.

Article Title: Nuclear speckles enable processing of RNA from GC-rich isochores.
Article Snippet: .. 57 HCT116 WT and HCT116 Halo-SON SRRM2-SNAP-FKBP cells were incubated for 18 hours in one of the 6 conditions: HCT116 WT cells with i) 1μM HaloPROTAC3 (MedChemExpress, cat #HY-111997) + 1μM dTAG13 (Tocris, cat. no 6605), or ii) DMSO, as well as HCT116 Halo-SON SRRM2-SNAP-FKBP cells with iii) DMSO, iv) DMSO + 1μM dTAG13, v) DMSO + 1μM HaloPROTAC3, or vi) 1μM dTAG13 + 1μM HaloPROTAC3. ..

Article Title: Nuclear speckles enable processing of RNA from GC-rich isochores.
Article Snippet: .. To test the dependence of nuclear mRNA and MALAT1 clusters on SON and SRRM2 in human cells Halo-SON;SRRM2-SNAPFKBP HCT116 cells were incubated for 16 hours with either: i) DMSO ii) DMSO + 1μM HaloPROTAC3 (MedChemExpress, cat #HY-111997) iii) DMSO + 1μM dTAG13 (Tocris, cat. no. 6605) or iv) 1μM HaloPROTAC3 + 1μM dTAG13. ..

other:

Article Title: Nuclear speckles enable processing of RNA from GC-rich isochores.
Article Snippet: Homozygous insertion of the construct was confirmed by PCR genotyping, Western Blot upon dTAG (Tocris, cat.no 6605) induced depletion and Sanger sequencing of SRRM2 3’ end.

Cell Culture:

Article Title: Nuclear speckles enable processing of RNA from GC-rich isochores.
Article Snippet: p(A)+ RNA from total cell lysates was purified using Dynabeads mRNA DIRECT Purification Kit (Thermo Fisher Scientific, cat. no. 61012) and processed into libraries using KAPA RNA HyperPrep Kit (KK8544, Roche). ll OPEN ACCESS e6 Cell 189, 1–16.e1–e13, April 2, 2026 Please cite this article in press as: Małszycki et al., Nuclear speckles enable processing of RNA from GC-rich isochores, Cell (2026), https:// doi.org/10.1016/j.cell.2026.01.011 Article Total RNA from the whole cell lysate and fractionated cells (nuclear and cytoplasmic fractions) was processed into the libraries with the KAPA Stranded RNA-Seq kit with RiboErase (HMR) protocol (KAPA RiboErase kit KK8481 and KAPA Stranded RNA-Seq kit KK8400, Roche). .. HCT116 Halo-SON SRRM2-SNAP-FKBP were cultured for 16 hours in the presence of DMSO (control) or 1μM SMGi-11j (NMD inhibitor MedChemExpress, HY-124719) as well as one of i) DMSO ii) DMSO + 1μM HaloPROTAC3 (MedChemExpress, cat #HY111997) iii) DMSO + 1μM dTAG13 (Tocris, cat. no. 6605) or iv) 1μM HaloPROTAC3 + 1μM dTAG13. .. After the incubation the RNA from the whole cell lysates was purified with Quick-RNA MicroPrep kit (ZYMO, cat. no R1050). p(A)+ RNA was purified using Dynabeads mRNA DIRECT Purification Kit. cDNA from p(A)+ RNA was prepared using PrimeScriptTM RT Master Mix (Takara cat. no. RR036A).

Control:

Image Search Results

Journal: Antimicrobial Agents and Chemotherapy

Article Title: Proof of concept: targeted protein degradation of the stress granules component G3BP1 as an antiviral strategy against norovirus infection

doi: 10.1128/aac.01118-25

Figure Lengend Snippet: HaloPROTAC3 efficiently binds Halotag and HaloG3BP1 fusion proteins. ( A ) Chemical structure of HaloPROTAC3 and the enantiomeric form ent -HaloPROTAC3; the scheme indicates the warhead-binding VHL E3 ubiquitin ligase (VH285) and the chloroalkene moiety-binding Halotag (generated using Marvin JS 22.11.1, web-based chemical sketch tool by Chemaxon). ( B ) BV2 ΔG3BP1 + HaloG3 BP1 cells were treated with the indicated concentrations of HaloPROTAC3 for 48 h, and metabolic cell death was measured using CellTiter-Blue. Cell death was calculated as relative to the DMSO control, and CC 50 is indicated by a dotted line. ( C–E ) BV2 + Halotag, BV2 ΔG3BP1 + Halotag, or BV2 ΔG3BP1 + HaloG3 BP1 cells treated with the indicated concentrations of HaloPROTAC3 for 48 h were subjected to flow cytometry analysis after incubation for 2 h with the fluorescent ligand Halotag Janelia 647. ( C ) Gating strategy of Halotag + cells in the live cell population. ( D ) Representative histograms and ( E ) dose-response curves of the quantified percentage of Halotag + cells. The corresponding curve fitting parameters for each cell line are shown.

Article Snippet: HaloPROTAC3 (VH285-PEG4-C4-Cl, HY-111997) and VH032 (HY-120217) were purchased from MedChemExpress. ent -HaloPROTAC3 was obtained from Promega.

Techniques: Binding Assay, Ubiquitin Proteomics, Generated, Control, Flow Cytometry, Incubation

Journal: Antimicrobial Agents and Chemotherapy

Article Title: Proof of concept: targeted protein degradation of the stress granules component G3BP1 as an antiviral strategy against norovirus infection

doi: 10.1128/aac.01118-25

Figure Lengend Snippet: HaloPROTA3 degrades Halotag and HaloG3BP1 fusion proteins. ( A–E ) Protein samples from BV2 + Halotag, ΔG3BP1 + Halotag, or ΔG3BP1 + HaloG3 BP1 cells treated for either 24 h or 48 h with HaloPROTAC3 or ent -HaloPROTAC3 were subjected to Western blot analysis using antibodies against Halotag, G3BP1, or GAPDH. ( A ) Representative Western blots and ( B ) quantification of the Halotag protein expression in cells treated with HaloPROTAC3 normalized to GAPDH. ( C ) BV2 ΔG3BP1 + HaloG3 BP1 cells treated for 48 h with either 1.2 µM of HaloPROTAC3 or the indicated concentrations of ent -HaloPROTAC3 were subjected to flow cytometry analysis, as stated in . Data is expressed as mean ± standard error of the mean with ∗∗∗∗ indicating P ≤ 0.0001. ( D ) Representative Western blots and ( E ) quantification of the Halotag protein expression in cells treated with ent- HaloPROTAC3 normalized to GAPDH.

Article Snippet: HaloPROTAC3 (VH285-PEG4-C4-Cl, HY-111997) and VH032 (HY-120217) were purchased from MedChemExpress. ent -HaloPROTAC3 was obtained from Promega.

Techniques: Western Blot, Expressing, Flow Cytometry

Journal: Antimicrobial Agents and Chemotherapy

Article Title: Proof of concept: targeted protein degradation of the stress granules component G3BP1 as an antiviral strategy against norovirus infection

doi: 10.1128/aac.01118-25

Figure Lengend Snippet: Degradation of G3BP1 using HaloPROTAC3 shows antiviral activity against norovirus. BV2 ΔG3BP1 + HaloG3 BP1 cells were treated for 48 h with the shown concentrations of HaloPROTA3 and infected with MNV1. After 1 h of virus adsorption, the virus inoculum was removed, and HaloPROTAC3 was re-added to the cell culture medium for the remaining infection time. ( A ) Scheme of the experimental setup of the antiviral assays. ( B–D ) Cells infected with MOI 1 TCID 50 /cell for 16 h were incubated with fluorescent ligand Halotag Janelia 647 for 2 h, harvested, and stained with anti-dsRNA antibody to assess the percentage of infection. Cells were then subjected to flow cytometry analysis. ( B ) Gating strategy showing first the duplet exclusion for selection of single cells, followed by dead cell exclusion within the single-cell population. Halotag + cells and dsRNA + cells were gated exclusively from the live cell population. ( C ) Quantification of the percentage of Halotag + and ( D ) dsRNA + (infected) cells across HaloPROTAC3 concentrations. ( E ) Total RNA was isolated from cells infected with MOI 1 TCID 50 /cell for 10 h and used to quantify the levels of viral RNA (expressed as vRNA copies/µg RNA, normalized to the DMSO control), by RT-qPCR. ( F ) Extracellular infectious virus yield in supernatants from cells infected with MOI 1 TCID 50 /cell for 16 h and treated with the indicated concentrations of HaloPROTAC3 was quantified by TCID 50 in BV2 cells. ( G, H ) Infection-induced cell death was detected using the NIR dye measured in the live-cell imaging IncuCyte system. ( G ) Representative pictures after 24 h.p.i.; NIR + cells are shown in blue. ( H ) Quantification of the total number of NIR + cells for the shown HaloPROTAC3 concentrations. Data is expressed as mean ± standard error of the mean with ∗ , ∗∗ , ∗∗∗ , and ∗∗∗∗ indicating P ≤ 0.05, P ≤ 0.01, P ≤ 0.001, and P ≤ 0.0001 respectively.

Article Snippet: HaloPROTAC3 (VH285-PEG4-C4-Cl, HY-111997) and VH032 (HY-120217) were purchased from MedChemExpress. ent -HaloPROTAC3 was obtained from Promega.

Techniques: Activity Assay, Infection, Virus, Adsorption, Cell Culture, Incubation, Staining, Flow Cytometry, Selection, Single Cell, Isolation, Control, Quantitative RT-PCR, Live Cell Imaging

Journal: Antimicrobial Agents and Chemotherapy

Article Title: Proof of concept: targeted protein degradation of the stress granules component G3BP1 as an antiviral strategy against norovirus infection

doi: 10.1128/aac.01118-25

Figure Lengend Snippet: Degradation of G3BP1 is required for HaloPROTAC3 antiviral activity. ( A, B ) BV2 ΔG3BP1 + HaloG3 BP1 cells were treated for 48 h with 1.2 µM of HaloPROTAC3 or ent -HaloPROTAC3, as indicated, and infected with MNV1. After 1 h of virus adsorption, the virus inoculum was removed and PROTACs re-added to the cell culture medium. ( A ) Extracellular infectious virus yield in supernatants from cells infected with MOI 1 TCID 50 /cell for 16 h and treated with either HaloPROTAC3 or ent -HALOPROTAC3 was quantified by TCID 50 in BV2 cells. ( B ) Infection-induced cell death was detected using the NIR dye measured in the live-cell imaging IncuCyte system. Shown is the quantification of the total number of NIR + cells for cells treated with either HaloPROTAC3 or ent -HaloPROTACs, measured every 3 h and followed for a total of 72 h.p.i. ( C–F ) BV2 ΔG3BP1 + HaloG3 BP1 cells were concomitantly treated for 48 h with 1.2 µM of HaloPROTAC3 and VH032 in the indicated concentrations. ( C ) Metabolic cell death was measured using CellTiter-Blue. Cell death was calculated as relative to the DMSO control. A concentration of 75 µM of VH032 is indicated by a dotted line. ( D ) Protein samples from cells treated for either 24 or 48 h with the indicated concentrations of HaloPROTAC3 and VH032 were subjected to Western blot analysis using antibodies directed Halotag or GAPDH. Bar plot shows the quantification of the Halotag protein bands from three independent experiments for all the experimental conditions. ( E ) Cells were infected with MOI 1 TCID 50 /cell of MNV1. After 1 h of virus adsorption, the virus inoculum was removed and drugs re-added to the cell culture medium. Infection-induced cell death was detected using the NIR dye measured in the live-cell imaging IncuCyte system, as stated in B . Shown is the quantification of the total number of NIR + cells measured after 24 h.p.i. ( F ) Extracellular infectious virus yield quantified by TCID 50 in BV2 cells from supernatants of cells infected with MOI 1 TCID 50 /cell for 16 h and treated with 1.2 µM of HaloPROTAC3 and 30 µM of VH032. Data is expressed as mean ± standard error of the mean with ∗∗ , ∗∗∗ , and ∗∗∗∗ indicating P ≤ 0.01, P ≤ 0.001, and P ≤ 0.0001 respectively. ‘ns’ denotes non-significant.

Article Snippet: HaloPROTAC3 (VH285-PEG4-C4-Cl, HY-111997) and VH032 (HY-120217) were purchased from MedChemExpress. ent -HaloPROTAC3 was obtained from Promega.

Techniques: Activity Assay, Infection, Virus, Adsorption, Cell Culture, Live Cell Imaging, Control, Concentration Assay, Western Blot

a Schematics illustrate five degron technologies for ligand-inducible protein depletion. b , c Western blots indicate comparative depletion of endogenously tagged CTCF and RAD21 proteins in KOLF2.2J iPSCs. The endogenous genes had a homozygous knock-in of mAID, miniIAA7, FKBP12(F36V), HaloTag, and IKZF3 degron tags at the C-termini of the target genes, and the target proteins were induced to degrade by treating cells with 1 μM 5-Phenyl-indole-3-acetic acid (5-Ph-IAA, synthetic auxin), 500 μM Indole-3-acetic acid (IAA, auxin), 1 μM dTAG13, 1 μM HaloPROTAC3, or 1 μM Pomalidomide, respectively, for 0, 1, 6, and 24 h. d Western blots show relative recovery rates of endogenous CTCF protein levels in five degron systems. KOLF2.2J iPSCs were treated with respective ligands for 6 h, then the ligands were washed out, and target protein levels were assessed after 24 h and 48 h with western blot. e Bar plots show quantification of target protein depletion after 1 h, 6 h, and 24 h of treatment with each chemical degrader. f The bar plot shows relative CTCF protein recovery after ligand washout in each degron system. g The single cell analysis (UMAP visualization) shows the relative expression levels of endogenous VHL , CRBN genes, and CAG-promoter driven OsTIR1 gene expression in iPSCs differentiated as embryoid bodies for 21 days. Each experiment in b – d was repeated independently at least twice with similar results. Data and error bars in e and f indicate the means ± SD ( n = 3). Source data is provided as a Source Data file.

Journal: Nature Communications

Article Title: Systematic comparison and base-editing-mediated directed protein evolution and functional screening yield superior auxin-inducible degron technology

doi: 10.1038/s41467-025-61848-1

Figure Lengend Snippet: a Schematics illustrate five degron technologies for ligand-inducible protein depletion. b , c Western blots indicate comparative depletion of endogenously tagged CTCF and RAD21 proteins in KOLF2.2J iPSCs. The endogenous genes had a homozygous knock-in of mAID, miniIAA7, FKBP12(F36V), HaloTag, and IKZF3 degron tags at the C-termini of the target genes, and the target proteins were induced to degrade by treating cells with 1 μM 5-Phenyl-indole-3-acetic acid (5-Ph-IAA, synthetic auxin), 500 μM Indole-3-acetic acid (IAA, auxin), 1 μM dTAG13, 1 μM HaloPROTAC3, or 1 μM Pomalidomide, respectively, for 0, 1, 6, and 24 h. d Western blots show relative recovery rates of endogenous CTCF protein levels in five degron systems. KOLF2.2J iPSCs were treated with respective ligands for 6 h, then the ligands were washed out, and target protein levels were assessed after 24 h and 48 h with western blot. e Bar plots show quantification of target protein depletion after 1 h, 6 h, and 24 h of treatment with each chemical degrader. f The bar plot shows relative CTCF protein recovery after ligand washout in each degron system. g The single cell analysis (UMAP visualization) shows the relative expression levels of endogenous VHL , CRBN genes, and CAG-promoter driven OsTIR1 gene expression in iPSCs differentiated as embryoid bodies for 21 days. Each experiment in b – d was repeated independently at least twice with similar results. Data and error bars in e and f indicate the means ± SD ( n = 3). Source data is provided as a Source Data file.

Article Snippet: At 48 h after seeding, cells were treated with 500 μM IAA (Millipore Sigma, 87-51-4), 1 μM 5-Ph-IAA, 1 μM dTAG13 (MedChem Express, HY-114421), 1 μM HaloPROTAC3 (Promega, GA3110) and Pomalidomide (Selleck Chemicals, S1567), respectively.

Techniques: Western Blot, Knock-In, Single-cell Analysis, Expressing, Gene Expression

Journal: Nature Communications

Article Title: Systematic comparison and base-editing-mediated directed protein evolution and functional screening yield superior auxin-inducible degron technology

doi: 10.1038/s41467-025-61848-1

Techniques: Western Blot, Knock-In, Single-cell Analysis, Expressing, Gene Expression

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haloprotac3 (MedChemExpress)

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1) Product Images from "Proof of concept: targeted protein degradation of the stress granules component G3BP1 as an antiviral strategy against norovirus infection"

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