Abstract
Affinity selection-mass spectrometry (AS-MS) is a sensitive technology for identifying small molecules that bind to target proteins, and assays enabled by AS-MS can be used to delineate relative binding affinities of ligands for proteins. 'Indirect' AS-MS assays employ size-exclusion techniques to separate target-ligand complexes from unbound ligands, and target-associated ligands are then specifically detected by liquid chromatography mass spectrometry. We report how indirect AS-MS binding assays with known reference control compounds were used as guideposts for development of an optimized purification method for CXCR4, a G-protein coupled chemokine receptor, for which we sought novel antagonists. The CXCR4 purification method that was developed was amenable to scale-up and enabled the screening of purified recombinant human CXCR4 against a large combinatorial library of small molecules by high throughput indirect AS-MS. The screen resulted in the discovery of new ligands that competed off binding of reference compounds to CXCR4 in AS-MS binding assays and that antagonized SDF1α-triggered responses and CXCR4-mediated HIV1 viral uptake in cell-based assays. This report provides a methodological paradigm whereby indirect AS-MS-based ligand binding assays may be used to guide optimal integral membrane protein purification methods that enable downstream affinity selection-based applications such as high throughput AS-MS screens.
Keywords: Affinity selection, antagonist, chemokine, combinatorial libraries, CXCR4, G-protein coupled receptor, high throughput screening, ligand binding assay, mass spectrometry, purification, protein target
Combinatorial Chemistry & High Throughput Screening
Title:Application of Affinity Selection-Mass Spectrometry Assays to Purification and Affinity-Based Screening of the Chemokine Receptor CXCR4
Volume: 15 Issue: 6
Author(s): Charles E. Whitehurst, Zhiping Yao, Denise Murphy, Mingxuan Zhang, Shane Taremi, Lisa Wojcik, Julie M. Strizki, Jack D. Bracken, Cliff C. Cheng, Xianshu Yang, Gerald W. Shipps, Michael Ziebell and Elliott Nickbarg
Affiliation:
Keywords: Affinity selection, antagonist, chemokine, combinatorial libraries, CXCR4, G-protein coupled receptor, high throughput screening, ligand binding assay, mass spectrometry, purification, protein target
Abstract: Affinity selection-mass spectrometry (AS-MS) is a sensitive technology for identifying small molecules that bind to target proteins, and assays enabled by AS-MS can be used to delineate relative binding affinities of ligands for proteins. 'Indirect' AS-MS assays employ size-exclusion techniques to separate target-ligand complexes from unbound ligands, and target-associated ligands are then specifically detected by liquid chromatography mass spectrometry. We report how indirect AS-MS binding assays with known reference control compounds were used as guideposts for development of an optimized purification method for CXCR4, a G-protein coupled chemokine receptor, for which we sought novel antagonists. The CXCR4 purification method that was developed was amenable to scale-up and enabled the screening of purified recombinant human CXCR4 against a large combinatorial library of small molecules by high throughput indirect AS-MS. The screen resulted in the discovery of new ligands that competed off binding of reference compounds to CXCR4 in AS-MS binding assays and that antagonized SDF1α-triggered responses and CXCR4-mediated HIV1 viral uptake in cell-based assays. This report provides a methodological paradigm whereby indirect AS-MS-based ligand binding assays may be used to guide optimal integral membrane protein purification methods that enable downstream affinity selection-based applications such as high throughput AS-MS screens.
Export Options
About this article
Cite this article as:
E. Whitehurst Charles, Yao Zhiping, Murphy Denise, Zhang Mingxuan, Taremi Shane, Wojcik Lisa, M. Strizki Julie, D. Bracken Jack, C. Cheng Cliff, Yang Xianshu, W. Shipps Gerald, Ziebell Michael and Nickbarg Elliott, Application of Affinity Selection-Mass Spectrometry Assays to Purification and Affinity-Based Screening of the Chemokine Receptor CXCR4, Combinatorial Chemistry & High Throughput Screening 2012; 15 (6) . https://dx.doi.org/10.2174/138620712800563945
DOI https://dx.doi.org/10.2174/138620712800563945 |
Print ISSN 1386-2073 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5402 |
Call for Papers in Thematic Issues
Artificial Intelligence Methods for Biomedical, Biochemical and Bioinformatics Problems
Recently, a large number of technologies based on artificial intelligence have been developed and applied to solve a diverse range of problems in the areas of biomedical, biochemical and bioinformatics problems. By utilizing powerful computing resources and massive amounts of data, methods based on artificial intelligence can significantly improve the ...read more
Eco-friendly Agents for Biological Control of Pathogenic Diseases
The discovery of an alternative biological approach to disease management includes work on medicinal products derived from natural sources as a starting point for the development of eco-friendly agents for these diseases and the injuries they cause, as well as reducing human contact with hazardous chemicals and their residues. We ...read more
Emerging trends in diseases mechanisms, noble drug targets and therapeutic strategies: focus on immunological and inflammatory disorders
Recently infectious and inflammatory diseases have been a key concern worldwide due to tremendous morbidity and mortality world Wide. Recent, nCOVID-9 pandemic is a good example for the emerging infectious disease outbreak. The world is facing many emerging and re-emerging diseases out breaks at present however, there is huge lack ...read more
Exploring Spectral Graph Theory in Combinatorial Chemistry
Scope of the Thematic Issue: Combinatorial chemistry involves the synthesis and analysis of a large number of diverse compounds simultaneously. Traditional methods rely on brute force experimentation, which can be time-consuming and resource-intensive. Spectral Graph Theory, a branch of mathematics dealing with the properties of graphs in relation to the ...read more
- Author Guidelines
- Graphical Abstracts
- Fabricating and Stating False Information
- Research Misconduct
- Post Publication Discussions and Corrections
- Publishing Ethics and Rectitude
- Increase Visibility of Your Article
- Archiving Policies
- Peer Review Workflow
- Order Your Article Before Print
- Promote Your Article
- Manuscript Transfer Facility
- Editorial Policies
- Allegations from Whistleblowers
Related Articles
-
Blockage of Autophagy in C6 Glioma Cells Enhanced Radiosensitivity Possibly by Attenuating DNA-PK-Dependent DSB Due to Limited Ku Nuclear Translocation and DNA Binding
Current Molecular Medicine Targeting the BH3 Domain of Bcl-2 Family Proteins. A Brief History From Natural Products to Foldamers As Promising Cancer Therapeutic Avenues
Current Medicinal Chemistry Therapeutic Targeting of Apoptotic Pathways in Cancer
Current Drug Targets Editorial (Thematic Issue: Systems and Network Biology in Pharmaceutical Drug Discovery)
Current Pharmaceutical Design Resveratrol, a Phytochemical Inducer of Multiple Cell Death Pathways: Apoptosis, Autophagy and Mitotic Catastrophe
Current Medicinal Chemistry Anticancer Effects of Ginsenoside Rh2: A Systematic Review
Current Molecular Pharmacology Inhibitory Effect of Ebselen on Cerebral Acetylcholinesterase Activity In Vitro: Kinetics and Reversibility of Inhibition
Current Pharmaceutical Design Inhibitors of Cyclin Dependent Kinases: Useful Targets for Cancer Treatment
Current Cancer Drug Targets Triterpenoids for Cancer Prevention and Treatment: Current Status and Future Prospects
Current Pharmaceutical Biotechnology Ring Finger Ubiquitin Protein Ligases and Their Implication to the Pathogenesis of Human Diseases
Current Pharmaceutical Design Natural Killer Cells: Prospects in Cancer Immunotherapy
Current Immunology Reviews (Discontinued) Exploring a Novel Target Treatment on Breast Cancer: Aloe-emodin Mediated Photodynamic Therapy Induced Cell Apoptosis and Inhibited Cell Metastasis
Anti-Cancer Agents in Medicinal Chemistry Recent Patents Reveal Microtubules as Persistent Promising Target for Novel Drug Development for Cancers
Recent Patents on Anti-Infective Drug Discovery Stem Cell-Derived Microvesicles: A Cell Free Therapy Approach to the Regenerative Medicine
Current Biotechnology Role of GSK-3 in Cardiac Health: Focusing on Cardiac Remodeling and Heart Failure
Current Drug Targets Novel Superactive Leptin Antagonists and their Potential Therapeutic Applications
Current Pharmaceutical Design Transductional and Transcriptional Targeting of Adenovirus for Clinical Applications
Current Gene Therapy Diagnosis and Management of Endocrine Hypertension in Children and Adolescents
Current Pharmaceutical Design Nanotools for the Delivery of Antimicrobial Peptides
Current Drug Targets Protein Degradation by the Ubiquitin-Proteasome Pathway and Organ Fibrosis
Current Medicinal Chemistry