Enhanced Silk Protein Fragment Compositions and Production Methods

This inventive concept presents a suite of improvements to the original stable silk protein fragment compositions, enhancing their purity, stability, solubility, and viscoelastic properties, while also introducing novel production methods and devices.

The original patent disclosed stable silk protein fragment compositions, but these compositions still had limitations in terms of purity, stability, and solubility. The new inventive concept addresses these limitations by introducing a system for producing silk protein fragment compositions with improved purity, methods for generating compositions with enhanced stability, and compositions with improved solubility. Additionally, the new concept presents a device for reconstituting silk protein fragment compositions and a method for producing compositions with tailored viscoelastic properties.

The new inventive concept comprises a system for producing silk protein fragment compositions with improved purity, featuring a sericin-removal module and a molecular-weight-tailoring module. This system enables the production of silk protein fragments with a polydispersity of less than 1.5. Furthermore, the concept introduces a method for generating silk protein fragment compositions with enhanced stability, involving the treatment of silk protein fragments with a stabilizing agent and subsequent lyophilization. The resulting composition has a shelf life of at least 2 years. The inventive concept also encompasses a silk protein fragment composition with improved solubility, comprising silk protein fragments with a molecular weight of less than 10 kDa and a solvent selected from the group consisting of water, ethanol, and glycerol. This composition is capable of dissolving at a concentration of at least 50 mg/mL. Additionally, the concept presents a device for reconstituting silk protein fragment compositions, featuring a mixing chamber and a temperature control module, which enables the reconstitution of the composition at a temperature of between 20°C and 40°C. Finally, the inventive concept includes a method for producing silk protein fragment compositions with tailored viscoelastic properties, involving the mixing of silk protein fragments with a viscoelastic modifier and subsequent lyophilization. The resulting composition has a viscoelastic modulus of at least 100 Pa.

The new inventive concept is novel and non-obvious in that it introduces a comprehensive suite of improvements to the original stable silk protein fragment compositions, addressing their limitations in purity, stability, solubility, and viscoelastic properties. The specific combinations of modules, methods, and compositions presented in the new claims are not anticipated by the original patent and represent a significant inventive step.

Alternative embodiments of the inventive concept could include variations in the sericin-removal module, such as using different sericin-binding agents or modifying the module's operating conditions. Other variations could involve using different stabilizing agents or viscoelastic modifiers, or altering the mixing chamber and temperature control module designs. These variations would ensure broad conceptual coverage and adaptability to different applications.

The enhanced silk protein fragment compositions and production methods presented in this inventive concept have significant commercial potential in the biomedical, pharmaceutical, and cosmetic industries. They could be used in a wide range of applications, including tissue engineering, wound healing, and drug delivery. The improved properties of the compositions and the novel production methods could also enable new product developments and open up new market opportunities.