[Structural-functional study of recombinant forms of onconase].

Area of Science:

• Biochemistry
• Molecular Biology
• Biotechnology

Background:

• Onconase is a cytotoxic protein with potential therapeutic applications.
• Understanding its structure-function relationship is crucial for developing onconase-based therapies.
• Efficient production of soluble, active onconase is essential for research and therapeutic development.

Purpose of the Study:

• To develop a method for expressing a soluble form of onconase.
• To characterize the enzymatic and cytotoxic properties of recombinant onconase.
• To assess the impact of modifications on onconase activity and utility.

Main Methods:

• Gene expression of onconase to yield a soluble protein.
• Isolation of recombinant onconase under nondenaturing conditions.
• Characterization of ribonucleolytic activity and cytotoxic properties.
• Addition of a peptide tag for simplified isolation and detection.

Main Results:

• A method for producing soluble recombinant onconase was successfully developed.
• Recombinant onconase with an N-terminal Met residue showed comparable ribonucleolytic activity to the native enzyme.
• A 33-mer peptide tag did not alter the enzymatic properties of onconase.
• The recombinant protein retained its cytotoxic effects.

Conclusions:

• The developed method enables the production of active, soluble onconase.
• This method facilitates onconase structure-function studies.
• The approach allows for the creation of onconase-based fusion proteins for potential anticancer therapy.