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A new method for determining the denaturation temperature of collagen
Xin Chen1, Zhiwen Guo2, Junjie Zhang1
1Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, Lianyungang, China; Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China; College of Marine Life and Fisheries, Jiangsu Ocean University, Lianyungang, China.
A new Sirius Red method accurately determines collagen denaturation temperature using minimal samples (2-3 mg) and simple equipment. This cost-effective approach offers a convenient alternative to traditional, equipment-intensive techniques for various animal collagens.
Area of Science:
- Biochemistry
- Materials Science
- Analytical Chemistry
Background:
- Collagen denaturation temperature (Td) is a critical parameter in biomaterial and food science.
- Conventional methods like circular dichroism and differential scanning calorimetry require specialized equipment and large sample sizes (>75 mg), increasing costs and limiting accessibility.
- There is a need for a simpler, more cost-effective method for determining collagen Td.
Purpose of the Study:
- To introduce and validate a novel method using Sirius Red dye for determining collagen denaturation temperature (Td).
- To assess the suitability of the Sirius Red method for collagens from diverse animal sources.
- To compare the Sirius Red method with existing techniques, particularly viscosity measurements, in terms of accuracy, equipment needs, and sample requirements.
Main Methods:
- Collagen samples were obtained from calf tendon, silver carp skin, frog skin, and salmon skin.
- Denaturation temperature (Td) was determined using the Sirius Red staining method with minimal sample amounts (2-3 mg).
- Statistical analysis, including analysis of variance and t-test, was performed to compare the Sirius Red method with the viscosity method.
Main Results:
- The Sirius Red method successfully determined the denaturation temperatures of collagen from various sources: calf tendon (38.2 °C), silver carp skin (32.6 °C), frog skin (33.8 °C), and salmon skin (15.6 °C).
- No significant difference was observed between the denaturation temperatures determined by the Sirius Red method and the viscosity method.
- The Sirius Red method requires significantly less sample mass and simpler equipment compared to viscosity and other conventional methods.
Conclusions:
- The Sirius Red method provides a reliable and accurate determination of collagen denaturation temperature.
- This method is versatile, applicable to collagens from terrestrial, aquatic, and amphibian animals.
- The Sirius Red method serves as a convenient, cost-effective, and accessible alternative to traditional techniques for assessing collagen thermal stability.
