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Xerxa E, Bajorath J. Data-oriented protein kinase drug discovery. Eur J Med Chem 2024; 271:116413. [PMID: 38636127 DOI: 10.1016/j.ejmech.2024.116413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 04/06/2024] [Accepted: 04/11/2024] [Indexed: 04/20/2024]
Abstract
The continued growth of data from biological screening and medicinal chemistry provides opportunities for data-driven experimental design and decision making in early-phase drug discovery. Approaches adopted from data science help to integrate internal and public domain data and extract knowledge from historical in-house data. Protein kinase (PK) drug discovery is an exemplary area where large amounts of data are accumulating, providing a valuable knowledge base for discovery projects. Herein, the evolution of PK drug discovery and development of small molecular PK inhibitors (PKIs) is reviewed, highlighting milestone developments in the field and discussing exemplary studies providing a basis for increasing data orientation of PK discovery efforts.
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Affiliation(s)
- Elena Xerxa
- Department of Life Science Informatics and Data Science, B-IT, LIMES Program Unit Chemical Biology and Medicinal Chemistry, Lamarr Institute for Machine Learning and Artificial Intelligence, Rheinische Friedrich-Wilhelms-Universität, Friedrich-Hirzebruch-Allee 5/6, D-53115, Bonn, Germany
| | - Jürgen Bajorath
- Department of Life Science Informatics and Data Science, B-IT, LIMES Program Unit Chemical Biology and Medicinal Chemistry, Lamarr Institute for Machine Learning and Artificial Intelligence, Rheinische Friedrich-Wilhelms-Universität, Friedrich-Hirzebruch-Allee 5/6, D-53115, Bonn, Germany.
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2
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Burton NR, Backus KM. Functionalizing tandem mass tags for streamlining click-based quantitative chemoproteomics. Commun Chem 2024; 7:80. [PMID: 38600184 PMCID: PMC11006884 DOI: 10.1038/s42004-024-01162-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 03/27/2024] [Indexed: 04/12/2024] Open
Abstract
Mapping the ligandability or potential druggability of all proteins in the human proteome is a central goal of mass spectrometry-based covalent chemoproteomics. Achieving this ambitious objective requires high throughput and high coverage sample preparation and liquid chromatography-tandem mass spectrometry analysis for hundreds to thousands of reactive compounds and chemical probes. Conducting chemoproteomic screens at this scale benefits from technical innovations that achieve increased sample throughput. Here we realize this vision by establishing the silane-based cleavable linkers for isotopically-labeled proteomics-tandem mass tag (sCIP-TMT) proteomic platform, which is distinguished by early sample pooling that increases sample preparation throughput. sCIP-TMT pairs a custom click-compatible sCIP capture reagent that is readily functionalized in high yield with commercially available TMT reagents. Synthesis and benchmarking of a 10-plex set of sCIP-TMT reveal a substantial decrease in sample preparation time together with high coverage and high accuracy quantification. By screening a focused set of four cysteine-reactive electrophiles, we demonstrate the utility of sCIP-TMT for chemoproteomic target hunting, identifying 789 total liganded cysteines. Distinguished by its compatibility with established enrichment and quantification protocols, we expect sCIP-TMT will readily translate to a wide range of covalent chemoproteomic applications.
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Affiliation(s)
- Nikolas R Burton
- Department of Biological Chemistry, David Geffen School of Medicine, UCLA, Los Angeles CA, USA
- Department of Chemistry and Biochemistry, UCLA, Los Angeles, CA, USA
| | - Keriann M Backus
- Department of Biological Chemistry, David Geffen School of Medicine, UCLA, Los Angeles CA, USA.
- Department of Chemistry and Biochemistry, UCLA, Los Angeles, CA, USA.
- Molecular Biology Institute, UCLA, Los Angeles, CA, USA.
- DOE Institute for Genomics and Proteomics, UCLA, Los Angeles, CA, USA.
- Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, UCLA, Los Angeles, CA, USA.
- Jonsson Comprehensive Cancer Center, UCLA, Los Angeles, CA, USA.
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3
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Wiest A, Kielkowski P. Cu-Catalyzed Azide-Alkyne-Thiol Reaction Forms Ubiquitous Background in Chemical Proteomic Studies. J Am Chem Soc 2024; 146:2151-2159. [PMID: 38214237 PMCID: PMC10811670 DOI: 10.1021/jacs.3c11780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 12/28/2023] [Accepted: 12/29/2023] [Indexed: 01/13/2024]
Abstract
We report here a Cu-catalyzed azide-alkyne-thiol reaction forming thiotriazoles as the major byproduct under widely used bio-orthogonal protein labeling "click" conditions. The development of Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC) had a tremendous impact on many biological discoveries. However, the considered chemoselectivity of CuAAC is hampered by the high reactivity of cysteine free thiols, yielding thiotriazole protein conjugates. The reaction byproducts generate false-positive protein hits in functional proteomic studies. The reported detail investigation of conjugates between chemical probes containing terminal alkynes, azide tags, and cell lysates reveals the formation of thiotriazoles, which can be readily detected by in-gel fluorescence scanning or after peptide and protein enrichment by mass spectrometry-based proteomics. In protein level identification and quantification experiments, the produced fluorescent bands or enriched proteins may not result from the important enzymatically driven reaction and can be falsely assigned as hits. This study provides a complete list of the most common background proteins. The knowledge of this previously overlooked reactivity now leads to the introduction of modified CuAAC conditions, which avoids the undesired product formation, diminishes the background, and hence improves the signal-to-noise ratio.
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Affiliation(s)
- Andreas Wiest
- Department of Chemistry, LMU Munich, Würmtalstr. 201, 81375 Munich, Germany
| | - Pavel Kielkowski
- Department of Chemistry, LMU Munich, Würmtalstr. 201, 81375 Munich, Germany
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Sun Y, Zheng H, Qian L, Liu Y, Zhu D, Xu Z, Chang W, Xu J, Wang L, Sun B, Gu L, Yuan H, Lou H. Targeting GDP-Dissociation Inhibitor Beta (GDI2) with a Benzo[ a]quinolizidine Library to Induce Paraptosis for Cancer Therapy. JACS AU 2023; 3:2749-2762. [PMID: 37885576 PMCID: PMC10598831 DOI: 10.1021/jacsau.3c00228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 09/11/2023] [Accepted: 09/12/2023] [Indexed: 10/28/2023]
Abstract
Inducing paraptosis, a nonapoptotic form of cell death, has great therapeutic potential in cancer therapy, especially for drug-resistant tumors. However, the specific molecular target(s) that trigger paraptosis have not yet been deciphered yet. Herein, by using activity-based protein profiling, we identified the GDP-dissociation inhibitor beta (GDI2) as a manipulable target for inducing paraptosis and uncovered benzo[a]quinolizidine BQZ-485 as a potent inhibitor of GDI2 through the interaction with Tyr245. Comprehensive target validation revealed that BQZ-485 disrupts the intrinsic GDI2-Rab1A interaction, thereby abolishing vesicular transport from the endoplasmic reticulum (ER) to the Golgi apparatus and initiating subsequent paraptosis events including ER dilation and fusion, ER stress, the unfolded protein response, and cytoplasmic vacuolization. Based on the structure of BQZ-485, we created a small benzo[a]quinolizidine library by click chemistry and discovered more potent GDI2 inhibitors using a NanoLuc-based screening platform. Leveraging the engagement of BQZ-485 with GDI2, we developed a selective GDI2 degrader. The optimized inhibitor (+)-37 and degrader 21 described in this study exhibited excellent in vivo antitumor activity in two GDI2-overexpressing pancreatic xenograft models, including an AsPc-1 solid tumor model and a transplanted human PDAC tumor model. Altogether, our findings provide a promising strategy for targeting GDI2 for paraptosis in the treatment of pancreatic cancers, and these lead compounds could be further optimized to be effective chemotherapeutics.
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Affiliation(s)
- Yong Sun
- Department
of Natural Products Chemistry, Key Laboratory of Natural Products
& Chemical Biology, Ministry of Education, School of Pharmaceutical
Sciences, Shandong University, Jinan 250012, China
| | - Hongbo Zheng
- Department
of Natural Products Chemistry, Key Laboratory of Natural Products
& Chemical Biology, Ministry of Education, School of Pharmaceutical
Sciences, Shandong University, Jinan 250012, China
| | - Lilin Qian
- Department
of Natural Products Chemistry, Key Laboratory of Natural Products
& Chemical Biology, Ministry of Education, School of Pharmaceutical
Sciences, Shandong University, Jinan 250012, China
| | - Yue Liu
- Department
of Natural Products Chemistry, Key Laboratory of Natural Products
& Chemical Biology, Ministry of Education, School of Pharmaceutical
Sciences, Shandong University, Jinan 250012, China
| | - Deyu Zhu
- Department
of Biochemistry and Molecular Biology, School of Basic Medical Sciences,
Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Zejun Xu
- Department
of Natural Products Chemistry, Key Laboratory of Natural Products
& Chemical Biology, Ministry of Education, School of Pharmaceutical
Sciences, Shandong University, Jinan 250012, China
| | - Wenqiang Chang
- Department
of Natural Products Chemistry, Key Laboratory of Natural Products
& Chemical Biology, Ministry of Education, School of Pharmaceutical
Sciences, Shandong University, Jinan 250012, China
| | - Jianwei Xu
- Department
of General Surgery, Qilu Hospital of Shandong
University, Jinan 250012, China
| | - Lei Wang
- Department
of General Surgery, Qilu Hospital of Shandong
University, Jinan 250012, China
| | - Bin Sun
- National
Glycoengineering Research Center, Shandong
University, Jinan 250100, China
| | - Lichuan Gu
- State
Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
| | - Huiqing Yuan
- Key
Laboratory
of Experimental Teratology of the Ministry of Education, Institute
of Medical Sciences, The Second Hospital
of Shandong University, Jinan 250013, China
| | - Hongxiang Lou
- Department
of Natural Products Chemistry, Key Laboratory of Natural Products
& Chemical Biology, Ministry of Education, School of Pharmaceutical
Sciences, Shandong University, Jinan 250012, China
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Makarov D, Kielkowski P. Chemical Proteomics Reveals Protein Tyrosination Extends Beyond the Alpha-Tubulins in Human Cells. Chembiochem 2022; 23:e202200414. [PMID: 36218090 PMCID: PMC10099736 DOI: 10.1002/cbic.202200414] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 10/10/2022] [Indexed: 01/25/2023]
Abstract
Tubulin detyrosination-tyrosination cycle regulates the stability of microtubules. With respect to α-tubulins, the tyrosination level is maintained by a single tubulin-tyrosine ligase (TTL). However, the precise dynamics and tubulin isoforms which undergo (de)tyrosination in neurons are unknown. Here, we exploit the substrate promiscuity of the TTL to introduce an O-propargyl-l-tyrosine to neuroblastoma cells and neurons. Mass spectrometry-based chemical proteomics in neuroblastoma cells using the O-propargyl-l-tyrosine probe revealed previously discussed tyrosination of TUBA4A, MAPRE1, and other non-tubulin proteins. This finding was further corroborated in differentiating neurons. Together we present the method for tubulin tyrosination profiling in living cells. Our results show that detyrosination-tyrosination is not restricted to α-tubulins with coded C-terminal tyrosine and is thus involved in fine-tuning of the tubulin and non-tubulin proteins during neuronal differentiation.
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Affiliation(s)
- Dmytro Makarov
- LMU München, Department of Chemistry, Institute for Chemical Epigenetics - Munich (ICEM), Würmtalstrasse 201, 81375, Munich, Germany
| | - Pavel Kielkowski
- LMU München, Department of Chemistry, Institute for Chemical Epigenetics - Munich (ICEM), Würmtalstrasse 201, 81375, Munich, Germany
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