Overview
Autotaxin (ATX) is a secreted glycoprotein that belongs to the ectonucleotide pyrophosphatase/phosphodiesterase (ENPP) family. It is primarily known for its role in catalyzing the conversion of lysophosphatidylcholine (LPC) to lysophosphatidic acid (LPA), a bioactive lipid mediator. ATX is widely expressed in various tissues and has been implicated in numerous physiological and pathological processes, including cell migration, proliferation, and inflammation. Autotaxin was first identified as a motility-stimulating factor in melanoma cells, hence its name. Over the years, research has revealed its significance in cancer progression, fibrosis, and neuropathic pain. The enzyme's ability to generate LPA makes it a key player in signaling pathways that regulate cellular responses to environmental cues.
Physical and Chemical Properties
Autotaxin is a large glycoprotein with a molecular weight ranging approximately between 100-150 kDa, depending on glycosylation and other post-translational modifications. The enzyme exhibits optimal activity at physiological pH and temperature conditions. It is typically supplied as a lyophilized powder or in solution form, requiring careful handling to maintain stability. The enzyme's catalytic domain is responsible for its phosphodiesterase activity, which hydrolyzes LPC to produce LPA. Autotaxin's structure includes multiple domains that facilitate its interaction with cell surfaces and extracellular matrix components, enhancing its localized activity. The enzyme's solubility in aqueous buffers makes it suitable for in vitro assays and research applications.
Main Applications
Autotaxin is extensively studied in the context of cancer biology, where its overexpression is associated with tumor progression, metastasis, and angiogenesis. Researchers use ATX inhibitors to explore potential therapeutic strategies for cancers such as breast, ovarian, and lung cancer. The enzyme's role in LPA production also links it to inflammatory diseases and fibrosis, making it a target for drug development in these areas. In addition to its pathological roles, autotaxin is investigated for its physiological functions in development and tissue repair. For example, ATX-LPA signaling is crucial for vascular and nervous system development. Pharmaceutical companies and academic labs procure autotaxin for high-throughput screening, biomarker studies, and mechanistic research.
Safety and Storage
Autotaxin should be handled with standard laboratory precautions, including the use of gloves and protective eyewear. The enzyme is sensitive to repeated freeze-thaw cycles and should be aliquoted for long-term storage at -20°C or -80°C. Lyophilized ATX can be reconstituted in appropriate buffers, following supplier recommendations to ensure optimal activity. Proper storage conditions are critical to maintaining the enzyme's stability and functionality. Users should avoid exposing ATX to extreme temperatures or prolonged room temperature exposure. Safety data sheets (SDS) provided by suppliers should be consulted for specific handling and disposal guidelines.
B2B Procurement Guide
When procuring autotaxin for research or industrial applications, buyers should prioritize suppliers with a proven track record in protein production and quality control. Key factors to consider include the enzyme's purity (e.g., SDS-PAGE verification), specific activity, and endotoxin levels. Custom modifications, such as fluorescent labeling or mutant variants, may be available from specialized vendors. Pricing for autotaxin varies based on quantity, purity, and supplier. Bulk purchases may offer cost advantages, but buyers should ensure that storage and handling protocols are in place to maintain product integrity. It is advisable to request certificates of analysis (CoA) and compare offerings from multiple suppliers to secure the best value.
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