AP-PROTAC-2: a Photoswitchable multi-kinase PROTAC
Ontology highlight
ABSTRACT:
INSTRUMENT(S):
ORGANISM(S): Homo Sapiens (human)
TISSUE(S): Cell Culture
SUBMITTER: 
Qisi Zhang
LAB HEAD: Edward W. Tate
PROVIDER: PXD036224 | Pride | 2022-09-14
REPOSITORIES: Pride
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| QZ-009-F1.raw | Raw | |||
| QZ-009-F2.raw | Raw | |||
| QZ-009-F3.raw | Raw | |||
| QZ-009-F4.raw | Raw | |||
| QZ-009-F5.raw | Raw |
Items per page: 5 1 - 5 of 12 |
Similar Datasets
Project description:Proteolysis targeting chimeras (PROTACs) are bifunctional molecules that induce selective protein degradation by linking an E3 ubiquitin ligase enzyme to a target protein. This approach allows scope for targeting “undruggable” proteins and several PROTACs have reached the stage of clinical candidates. However, the roles of cellular transmembrane transporters in PROTAC uptake and efflux remain underexplored. Here, we utilized transporter-focused genetic screens to identify the ATP binding cassette transporter ABCC1/MRP1 as a key PROTAC resistance factor. Unlike the previously identified inducible PROTAC exporter ABCB1/MDR1, ABCC1 is highly expressed among cancers of various origins and constitutively restricts PROTAC bioavailability. Moreover, in a genome-wide PROTAC resistance screen, we identified candidates involved in processes such as ubiquitination, mTOR signaling and apoptosis as genetic factors involved in PROTAC resistance. In summary, our findings reveal ABCC1 as a crucial constitutively active efflux pump limiting PROTAC efficacy in various cancer cells, offering insights for overcoming drug resistance.
2025-07-17 | MTBLS11394 | MetaboLights
Project description:Bromodomain extraterminal protein (BETP) inhibitors transcriptionally repress oncoproteins and NFkB target genes, which undermines the growth and survival of MCL cells. However, BETi treatment causes accumulation of BETPs, associated with reversible binding and incomplete inhibition of BRD4, which potentially compromises the activity of BETi in MCL cells. Unlike BETi, BET-PROTACs (proteolysis-targeting chimera) ARV-825 and ARV-771 (Arvinas, Inc.) recruit and utilize an E3-ubiquitin ligase to effectively degrade BETPs in MCL cells. BET-PROTACs induce more apoptosis than BETi of MCL cells, including those resistant to ibrutinib. BET-PROTAC treatment induced more perturbations in the mRNA and protein expressions than BETi, with depletion of c-Myc, CDK4, cyclin D1, and the NFkB transcriptional targets Bcl-xL, XIAP and BTK, while inducing the level of HEXIM1, NOXA and CDKN1A/p21. Treatment with ARV-771, which possesses superior pharmacological properties compared to ARV-825, inhibited the in vivo growth and induced greater survival improvement than the BETi OTX015 of immune-depleted mice engrafted with MCL cells. Co-treatment of ARV-771 with ibrutinib or the BCL2-antagonist venetoclax or CDK4/6 inhibitor palbociclib synergistically induced apoptosis of MCL cells. These studies highlight promising and superior pre-clinical activity of BET-PROTAC than BETi, requiring further in vivo evaluation of BET-PROTAC as a therapy for ibrutinib-sensitive or resistant MCL.
2019-04-26 | GSE98268 | GEO
Project description:Bromodomain extraterminal protein (BETP) inhibitors transcriptionally repress oncoproteins which undermines the growth and survival of AML cells. However, BETi treatment causes accumulation of BETPs, associated with reversible binding and incomplete inhibition of BRD4, which potentially compromises the activity of BETi in AML cells. Unlike BETi, BET-PROTAC (proteolysis-targeting chimera) ARV-825 recruits and utilize an E3-ubiquitin ligase to effectively degrade BETPs in AML cells. BET-PROTACs induce more apoptosis than BETi of mtRUNX1 AML cells. BET-PROTAC treatment induced more perturbations in the mRNA and protein expressions than BETi. It was noted that treatment with BETi or BET-PROTAC caused significant and sustained depletion of RUNX1 in AML cells. We also determined the effects of global depletion of RUNX1 in mtRUNX1 expressing AML OCI-AML5 cells. We observed an overlap in the signature of RUNX1 knockdown by shRNA with that of OTX015 and ARV-825 in OCI-AML5 cells.
2020-08-11 | GSE119261 | GEO
Project description:The different layers of complexity in PROTAC design have slowed the broad implementation of this novel pharmacological approach. Given the challenges and opportunities of CRL4CRBN hijacking PROTACs we set out to identify and develop broadly implementable strategies to generate PROTACs with improved specificity for their targets. We used structural analysis of known neo-substrate degrons to generate “degron blocked IMiD” analogues and validated that they did not degrade any known neo-substrates using quantitative proteomics. We then applied this strategy to a known BRD9 PROTAC (dBRD9-A) to generate a degron-blocking analogue with a specific degradation profile.
2023-07-10 | PXD038503 | Pride
Project description:The different layers of complexity in PROTAC design have slowed the broad implementation of this novel pharmacological approach. Given the challenges and opportunities of CRL4CRBN hijacking PROTACs we set out to identify and develop broadly implementable strategies to generate PROTACs with improved specificity for their targets. We used structural analysis of known neo-substrate degrons to generate “degron blocked IMiD” analogues and validated that they did not degrade any known neo-substrates using quantitative proteomics. We then applied this strategy to a known BRD9 PROTAC (dBRD9-A) to generate a degron-blocking analogue with a specific degradation profile.
2023-07-10 | PXD038298 | Pride
Project description:The proteolysis-targeting chimera (PROTAC) is a new technology to degrade a target protein. However, its clinical application is limited currently by lack of chemical binders to target protein. For instance, it is still unknown, whether splicing factor 3B subunit 1 (SF3B1) is targetable by PROTACs. We recently identified a 2-aminothiazole derivative (herein O4I2) to promote the generation of human pluripotent stem cells. In the present work, proteomic analysis on the biotinylated O4I2 revealed that O4I2 targeted SF3B1 and positively regulated RNA splicing.
2022-08-08 | PXD024661 | Pride
Project description:PROteolysis TArgeting Chimeras (PROTACs) have gained considerable attention as a new modality in drug discovery. However, the development of PROTACs has been mainly focused on CRBN (Cereblon) and VHL (van Hippel-Lindau Ligase) ligands. The considerable size of the human E3 ligase family, newly developed E3 ligase ligands, as well as the favorable druggability of some E3 ligase families hold the promise that novel degraders with unique pharmacological properties will be designed in the future using this large target space. Here, we developed a workflow for the evaluation of E3 ligand efficiency for PROTAC development and the corresponding “degradable” target space using broad-spectrum kinase inhibitors and the well-established VHL ligand VH032. Our study revealed VH032 linker attachment points that are highly efficient for kinase degradation and highlighted some of the pitfalls when using protein degradation as a readout. For instance, cytotoxicity was identified as a major mechanism leading to PROTAC- and VHL-independent kinase degradation. The combination of E3-ligand negative controls, kinase parent compounds and other tool compounds such as neddylation and proteasome inhibitors was essential to distinguish between VHL-dependent and -independent kinase degradation events. We hope that this study will provide a blueprint for future evaluation of the efficacy of new E3 ligand systems for degrader development.
2025-04-04 | PXD057431 | Pride
Project description:Gene transcription can be regulated by remote enhancer regions through chromosome looping either in cis or in trans. Cancer cells are characterized by wholesale changes in long-range gene interactions, but the role that these long-range interactions play in cancer progression and metastasis is not well understood. In this study, we used IGFBP3, a gene involved in breast cancer pathogenesis, as bait in a 4C-seq experiment comparing normal breast cells (HMEC) with two breast cancer cell lines (MCF7, an ER positive cell line, and MDA-MB-231, a triple negative cell line). The IGFBP3 long-range interaction profile was substantially altered in breast cancer. Many interactions seen in normal breast cells are lost and novel interactions appear in cancer lines. We found that in HMEC, the breast carcinoma amplified sequence gene family (BCAS) 1-4 were among the top 10 most significantly enriched regions of interaction with IGFBP3. 3D-FISH analysis indicated that the translocation-prone BCAS genes, which are located on chromosomes 1, 17 and 20, are in close physical proximity with IGFBP3 and each other in normal breast cells. We also found that epidermal growth factor receptor (EGFR), a gene implicated in tumorigenesis, interacts significantly with IGFBP3 and that this interaction may play a role in their regulation. Breakpoint analysis suggests that the interchromosomal rearrangements seen in the MCF7 cancer cell line involve regions that engage in long-range interactions in normal breast cells. Overall, our data from multiple lines of evidence suggest an important role for long-range chromosomal interactions in the pathogenesis of cancer. Comparison of IGFBP3 interaction profiles in normal breast tissue and 2 breast tumor subtypes
2013-08-03 | E-GEOD-49521 | biostudies-arrayexpress
Project description:Receptor-interacting serine/threonine-protein kinase 1 (RIPK1) functions as a critical stress sentinel that co- ordinates cell survival, inflammation, and immunogenic cell death (ICD). Although the catalytic function of RIPK1 is required to trigger cell death, its non-catalytic scaffold function mediates strong pro-survival signaling. Accordingly, cancer cells can hijack RIPK1 to block necroptosis and evade immune detection. We generated a small-molecule proteolysis-targeting chimera (PROTAC) that selectively degraded human and murine RIPK1. PROTAC-mediated depletion of RIPK1 deregulated TNFR1 and TLR3/4 signaling hubs, accentuating the output of NF-kB, MAPK, and IFN signaling. Additionally, RIPK1 degradation simultaneously promoted RIPK3 activation and necroptosis induction. We further demonstrated that RIPK1 degradation enhanced the immunostimulatory effects of radio- and immunotherapy by sensitizing cancer cells to treat- ment-induced TNF and interferons. This promoted ICD, antitumor immunity, and durable treatment responses. Consequently, targeting RIPK1 by PROTACs emerges as a promising approach to overcome radio- or immunotherapy resistance and enhance anticancer therapies.
2024-05-23 | PXD043560 | Pride
Project description:The bromodomain-containing protein, TAF1 (TFII-250), is the largest component of the multiprotein assembly TFIID, a dynamic complex that serves as a general factor for transcription initiation. CRISPR and RNAi screens of pan cancer cell lines revealed TAF1 is broadly required for optimal cell growth and survival, but a subset of cell lines showed enhanced TAF1 dependence. These observations suggest that TAF1 has the potential to serve as a therapeutic target in sensitive tumors. Current approaches employed to target TAF1 are limited to monovalent small molecule inhibitors of the bromodomain. However, recent studies showed that such inhibitors lack cancer cell kill potential. We applied a structure-guided approach to generate cereblon (CRBN) recruiting PROTAC degraders of TAF1 using the chemical scaffolds of ceralasertib and GNE371. We present evidence that GNE371-based PROTACs are effective in degradation of TAF1 at concentrations as low as 1 nM. TAF1 depletion activated p53 and induced apoptosis in AML cell lines and certain solid tumor cells. An in vivo active TAF1 PROTAC inhibited the growth of AML tumor xenograft. The results showed that inhibition of bromodomain is not sufficient to inactivate TAF1 functions, while a PROTAC approach induces strong biological effects. Furthermore, TAF1 PROTACs have therapeutic potential against AML and other sensitive tumors.
2025-02-28 | PXD061282 | Pride