Overview
Canine ubiquitin is a small, highly conserved protein consisting of 76 amino acids, universally present in eukaryotic cells. It plays a pivotal role in tagging damaged or misfolded proteins for degradation via the ubiquitin-proteasome system (UPS). This process is essential for maintaining cellular homeostasis, regulating immune responses, and ensuring proper DNA repair mechanisms. In veterinary and biomedical research, canine ubiquitin is studied for its role in diseases such as cancer, neurodegenerative disorders, and infections. Its high conservation across species makes it a valuable model for comparative studies, particularly in translational medicine.
Physical and Chemical Properties
Canine ubiquitin has a molecular weight of approximately 8.6 kDa and is stable under a wide range of temperatures and pH levels. Its compact structure includes a characteristic β-grasp fold, which facilitates interactions with other proteins. The protein is typically supplied as a lyophilized powder, soluble in aqueous buffers, and resistant to proteolytic degradation. Key chemical properties include its ability to form polyubiquitin chains through lysine residues, which determine the fate of tagged proteins (e.g., degradation or signaling). Analytical techniques like SDS-PAGE and mass spectrometry are commonly used to verify its purity and integrity.
Main Applications
In veterinary research, canine ubiquitin is used to study protein turnover mechanisms and disease biomarkers. It aids in understanding conditions like muscular dystrophy, cancer, and autoimmune disorders in dogs. The protein is also employed in developing diagnostic assays, such as ELISA, to detect ubiquitin-related pathologies. Biotechnological applications include its use in protein purification systems (e.g., ubiquitin-tagged affinity chromatography) and as a reference standard in proteomics. Its cross-reactivity with antibodies from other species allows for versatile experimental designs.
Safety and Storage
While canine ubiquitin is non-toxic, standard laboratory safety protocols should be followed, including the use of gloves and eye protection. Avoid inhalation or direct contact with skin/mucous membranes. Store lyophilized powder at -20°C in a desiccated environment; reconstituted solutions are stable for short-term use at 4°C. Long-term storage should minimize freeze-thaw cycles to prevent protein aggregation. Suppliers typically provide detailed handling instructions and material safety data sheets (MSDS) upon request.
B2B Procurement Guide
When procuring canine ubiquitin, prioritize suppliers with certifications (e.g., ISO 9001) and documented quality control processes. Key specifications to verify include purity (>95%), endotoxin levels (<1 EU/μg), and species-specific activity. Request batch-specific certificates of analysis (COA) and ensure compatibility with intended applications (e.g., immunoassays, cell culture). Bulk purchases may offer cost advantages, but confirm scalability and batch consistency. Lead times vary by supplier; plan procurement around project timelines. For research use, smaller quantities (0.1–1 mg) are commonly available.
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