Dataset Information

Development of inhibitors, probes, and PROTAC provides a complete toolbox to study PARK7 in the living cell

ABSTRACT: The innovation of combined chemical tools, such as small molecule inhibitors, activity-based probes (ABPs), and proteolysis targeting chimeras (PROTACs) for a specific target, not only advances clinical drug discovery but also provides a chemical toolbox to study the diverse biological perspective of targeted proteins. Here we report the development of such a chemical toolbox for the multifunctional human Parkinson disease protein 7 (PARK7/DJ-1) that has drawn attention as a candidate for drug discovery due to its involvement with Parkinson's disease and cancers. By combining structure-guided design, small library synthesis and high-throughput screening, we identified two compounds, JYQ-164 and JYQ-173, inhibiting PARK7 with high potency in vitro and in cell. These compounds covalently and selectively target its highly conserved and functionally essential residue, Cys106. Based on these compounds, we further developed two cell-permeable fluorescent probes, JYQ-192 and JYQ-196, with a SulfoCy5 dye to visualize PARK7 activity in living cells and a first-in-class PARK7 degrader JYQ-194 that selectively targets PARK7 to proteasomal degradation in human cells. Together, our study provides a valuable toolbox to advance the biology research of PARK7 in a cellular context and opens new opportunities for potential therapeutic application.

INSTRUMENT(S): Orbitrap Exploris 480

ORGANISM(S): Homo Sapiens (human)

TISSUE(S): Hela Cell

SUBMITTER: Rayman Tjokrodirijo

LAB HEAD: Peter A. van Veelen

PROVIDER: PXD047093 | Pride | 2024-06-16

REPOSITORIES: Pride

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Development of Inhibitors, Probes, and PROTAC Provides a Complete Toolbox to Study PARK7 in the Living Cell.

Jia Yuqing Y Oyken Merve M Kim Robbert Q RQ Tjokrodirijo Rayman T N RTN de Ru Arnoud H AH Janssen Antonius P A APA Hacker Stephan M SM van Veelen Peter A PA Geurink Paul P PP Sapmaz Aysegul A

Journal of medicinal chemistry 20240507 10

The integration of diverse chemical tools like small-molecule inhibitors, activity-based probes (ABPs), and proteolysis targeting chimeras (PROTACs) advances clinical drug discovery and facilitates the exploration of various biological facets of targeted proteins. Here, we report the development of such a chemical toolbox for the human Parkinson disease protein 7 (PARK7/DJ-1) implicated in Parkinson's disease and cancers. By combining structure-guided design, miniaturized library synthesis, and ...[more]

PMID: 38713163

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Project description:Background: Specific microglia responses are thought to contribute to the development and progression of neurodegenerative diseases, including Parkinson’s disease (PD). However, the phenotypic acquisition of microglial cells and their role during the underlying neuroinflammatory processes remain largely elusive. Here, according to the multiple-hit hypothesis, which stipulates that PD etiology is determined by a combination of genetics and various environmental risk factors, we investigate microglial transcriptional programs and morphological adaptations under PARK7/DJ-1 deficiency, a genetic cause of PD, during lipopolysaccharide (LPS)-induced inflammation. Methods: Using a combination of single-cell RNA-sequencing, bulk RNA-sequencing, multicolor flow cytometry and immunofluorescence analyses, we comprehensively compared microglial cell phenotypic characteristics in PARK7/DJ-1 knock-out (KO) with wildtype littermate mice following 6- or 24-hour intraperitoneal injection with LPS. For translational perspectives, we conducted corresponding analyses in human PARK7/DJ-1 mutant induced pluripotent stem cell (iPSC)-derived microglia and murine bone marrow-derived macrophages (BMDMs). Results: By excluding the contribution of other immune brain resident and peripheral cells, we show that microglia acutely isolated from PARK7/DJ-1 KO mice display a distinct phenotype, specially related to type II interferon and DNA damage response signaling, when compared with wildtype microglia, in response to LPS. We also detected discrete signatures in human PARK7/DJ-1 mutant iPSC-derived microglia and BMDMs from PARK7/DJ-1 KO mice. These specific transcriptional signatures were reflected at the morphological level, with microglia in LPS-treated PARK7/DJ-1 KO mice showing a less amoeboid cell shape compared to wildtype mice, both at 6 and 24 hours after acute inflammation, as also observed in BMDMs. Conclusions: Taken together, our results show that, under inflammatory conditions, PARK7/DJ-1 deficiency skews microglia towards a distinct phenotype characterized by downregulation of genes involved in type II interferon signaling and a less prominent amoeboid morphology compared to wildtype microglia. These findings suggest that the underlying oxidative stress associated with the lack of PARK7/DJ-1 affects microglia neuroinflammatory responses, which may play a causative role in PD onset and progression.

Project description:Background: Specific microglia responses are thought to contribute to the development and progression of neurodegenerative diseases, including Parkinson’s disease (PD). However, the phenotypic acquisition of microglial cells and their role during the underlying neuroinflammatory processes remain largely elusive. Here, according to the multiple-hit hypothesis, which stipulates that PD etiology is determined by a combination of genetics and various environmental risk factors, we investigate microglial transcriptional programs and morphological adaptations under PARK7/DJ-1 deficiency, a genetic cause of PD, during lipopolysaccharide (LPS)-induced inflammation. Methods: Using a combination of single-cell RNA-sequencing, bulk RNA-sequencing, multicolor flow cytometry and immunofluorescence analyses, we comprehensively compared microglial cell phenotypic characteristics in PARK7/DJ-1 knock-out (KO) with wildtype littermate mice following 6- or 24-hour intraperitoneal injection with LPS. In a translational approach, we conducted corresponding analyses in human PARK7/DJ-1 mutant induced pluripotent stem cell (iPSC)-derived microglia and murine bone marrow-derived macrophages (BMDMs). Results: By excluding the contribution of other immune brain resident and peripheral cells, we show that microglia acutely isolated from PARK7/DJ-1 KO mice display a distinct phenotype, specially related to type II interferon and DNA damage response signaling, when compared with wildtype microglia, in response to LPS. We also detected discrete signatures in human PARK7/DJ-1 mutant iPSC-derived microglia and BMDMs from PARK7/DJ-1 KO mice. These specific transcriptional signatures were reflected at the morphological level, with microglia in LPS-treated PARK7/DJ-1 KO mice showing a less amoeboid cell shape compared to wildtype mice, both at 6 and 24 hours after acute inflammation, as also observed in BMDMs. Conclusions: Taken together, our results show that, under inflammatory conditions, PARK7/DJ-1 deficiency skews microglia towards a distinct phenotype characterized by downregulation of genes involved in type II interferon signaling and a less prominent amoeboid morphology compared to wildtype microglia. These findings suggest that the underlying oxidative stress associated with the lack of PARK7/DJ-1 affects microglia neuroinflammatory responses, which may play a causative role in PD onset and progression.

Project description:Early-onset Parkinson's disease can be caused by mutations in the gene PARK7. Many functions have been proposed for PARK7, but in vivo evidence is largely lacking or conflicting with enzymological data. Here, we provide unequivocal evidence that PARK7 and its orthologues can prevent damage of proteins and metabolites inflicted by the glycolytic intermediate 1,3-bisphosphoglycerate, without changing the abundance of this metabolite. In the absence of PARK7, several glycerate-modified metabolites, as well as numerous glycerate- or phosphoglycerate-modified proteins accumulate in human cell lines, mouse brain and flies. This gives an explanation for the pleiotropic effects of PARK7, indicates that spontaneous metabolic damage contributes to the development of hereditary Parkinson's disease, and opens new roads for future therapeutic approaches. Submitted here are the proteomics analyses, where we identify and quantify glyceroyl- and phosphoglyceroyl-modifications of lysine residues in 5 different experimental models. 1. The human colorectal cancer cell line HCT116 was analyzed in four different conditions: a. Wild type cells transduced with an empty recombinant empty lentivirus b. PARK7 knockout cells transduced with an empty recombinant empty lentivirus c. PARK7 knockout cells transduced with a recombinant lentivirus driving expression of PARK7. 2. Brain samples from wild type and PARK7 knockout mice. 3. Red blood cell lysates from wild type and PARK7 knockout mice 4. Whole body extracts from wild type and DJ1beta knockout Drosophila melanogaster 5. In vitro reactions where 1,3-bisphosphoglycerate was produced either by GAPDH or PGK, in the presence and absence of PARK7. Samples were a. Enzymes in the absence of any cofactors (i.e. no 1,3-BPG production) b. Production via GAPDH (using glyceraldehyde 3-phosphate, phosphate and NAD+ as substrates) in the presence or absence of PARK7 c. Production via PGK (using 3-phosphoglycerate and ATP as substrates) in the presence or absence of PARK7.

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