Phosphatases are a superfamily of enzymes that hydrolyze phosphate ester bonds to remove phosphate groups from proteins, lipids, and nucleotides. Acting as functional antagonists of protein kinases, these enzymes are integral to the cellular signaling regulatory network. Given their role in dephosphorylating various substrates, phosphatases can be categorized into several classes based on substrate specificity.
Understanding Phosphatases
- Serine/Threonine Protein Phosphatases (Ser/Thr PPs): Key enzymes like PP1, PP2A, and PP2B operate through metal-dependent mechanisms vital for regulating metabolism, the cell cycle, and signal transduction.
- Classical Protein Tyrosine Phosphatases (PTPs): These enzymes utilize a catalytic cysteine for the specific dephosphorylation of phosphotyrosine residues.
- Dual-Specificity Phosphatases (DUSPs): Capable of dephosphorylating both serine/threonine and tyrosine residues, this class includes enzymes such as DUSP22.
- Lipid Phosphatases: For example, PTEN regulates critical signaling pathways such as the PI3K/AKT pathway.
- Low Molecular Weight Phosphatases: Structurally compact with unique substrate specificities.
Phosphatases in Drug Discovery
Phosphatases are essential in fine-tuning cellular signaling thresholds, enabling them to influence various pathological processes including tumor immune evasion, metabolic diseases, and neurodegeneration. Prominent phosphatases like PTP1B, SHP2, and PTEN have emerged as significant drug targets, with numerous inhibitors and modulators currently being developed.
Our Phosphatase Screening Services
Creative Bioarray offers advanced phosphatase screening services designed to facilitate efficient and high-throughput assessment of enzyme activity to expedite drug discovery initiatives.
Fluorescence-Based Activity Assays
We utilize a fluorescence-based phosphatase activity assay employing the fluorogenic substrate DiFMUP. This substrate undergoes enzymatic dephosphorylation to release a highly fluorescent product, allowing for precise quantification of phosphatase activity. Our assay features:
- High sensitivity with a low background signal
- Scalability for high-throughput screening
- Real-time kinetic measurements for mechanistic insights
Key Advantages
- Flexible Service Options:
- Primary screening with single-concentration formats
- Dose-response profiling for understanding inhibitor potency
- Mechanistic studies on enzyme kinetics and inhibition modes
- Advanced Technology:
- High-throughput assays available in various formats
- Automated liquid handling systems that ensure precision
- State-of-the-art fluorescence detection for optimal sensitivity
- Customized Solutions:
- Substrate optimization for unique phosphatases
- Tailored buffer conditions for specific experimental needs
- Adaptable workflows to integrate with other assays or studies
Our phosphatase screening services provide high-quality and reproducible data to enhance drug discovery efforts, from hit identification to lead optimization. With extensive expertise and commitment to client service, Creative Bioarray is poised to support your research endeavors at every development phase.