Overview
The Human Mitochondrial Coupling Factor (HCF) is a multi-subunit protein complex integral to the mitochondrial electron transport chain. It facilitates the coupling of electron transfer to ATP synthesis, a process critical for cellular energy homeostasis. Biochemically, it forms part of the F1Fo-ATP synthase complex, with subunits encoded by both nuclear and mitochondrial DNA. First characterized in the 1980s, HCF's structure-function relationship has been extensively studied using cryo-EM and X-ray crystallography. Its dysfunction is linked to mitochondrial disorders, making it a key target for metabolic disease research. Modern purification techniques yield 90-95% pure preparations suitable for mechanistic studies.
Physical and Chemical Properties
As a protein complex, HCF exhibits properties distinct from small molecules. Its quaternary structure comprises at least 16 subunits (α3β3γδε in F1 portion), with a total molecular weight around 550 kDa. The complex remains stable in neutral pH buffers but denatures in SDS or urea solutions. Spectrophotometric analysis reveals characteristic absorbance at 280 nm (A280/A260 ratio >1.8 for pure preparations). Functional assays typically measure ATP hydrolysis rates of 40-60 μmol/min/mg at 30°C. The complex requires cardiolipin for membrane association, reflecting its native mitochondrial inner membrane localization.
Main Applications
In research settings, HCF serves three primary purposes: (1) as a biochemical tool to study oxidative phosphorylation mechanisms, (2) as a reference standard for mitochondrial proteomics, and (3) as a target for drug discovery in metabolic diseases. Pharmaceutical companies screen HCF inhibitors for potential applications in cancer therapy. Clinical laboratories utilize HCF activity assays to diagnose mitochondrial myopathies. Recent studies also implicate HCF subunits in Parkinson's disease pathology, expanding its relevance to neurodegenerative disorder research. Emerging applications include bioenergetics profiling of stem cells and engineered mitochondria.
Safety and Storage
While HCF poses minimal toxicity risks, standard laboratory precautions apply. Use gloves and eye protection when handling lyophilized powder, which may cause irritation if inhaled. Aqueous solutions should contain protease inhibitors (e.g., PMSF) to prevent degradation. For storage, aliquot solutions in 50% glycerol at -80°C to maintain activity for years. Lyophilized preparations remain stable at -20°C with desiccant. Avoid repeated freeze-thaw cycles, which can cause subunit dissociation. Shipping requires dry ice for frozen samples and ambient temperature for lyophilized material.
B2B Procurement Guide
When sourcing HCF, prioritize suppliers providing: (1) SDS-PAGE purity documentation (>90%), (2) mass spectrometry verification of subunit composition, and (3) batch-specific activity data. Academic core facilities often offer cost-effective options compared to commercial vendors. For large-scale needs (>10 mg), consider custom expression services using HEK293 or insect cell systems. Lead times typically range 8-12 weeks. Budget approximately $15,000-$30,000 for gram-scale GMP-grade production. Always validate new batches with control experiments before large purchases.
Related Manufacturers
- 主营：科研试剂盒、酶免试剂盒、elisa试剂盒、人线粒体偶联因子6、细胞、生物试剂、进口ELISA试剂盒、PCR试剂盒、生化测试盒
- 主营：试剂盒、同源物、脂蛋白、人线粒体偶联因子6、合蛋白、粘液素、抑制素、亲环素、保护素、信号素、胞色素、脂肪酶、末端肽、磷脂酶、蛋白酶、变位酶、抑制剂、脱水酶、抑制物、凝蛋白、激活肽、连接酶、样激酶、解氨酶、恒温箱、利钠肽
- 主营：人线粒体偶联因子6、elisa试剂盒
- 主营：Elisa试剂盒