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Stimulation of bull seminal RNase by various basic proteins
Biochemistry International
|October 1, 1985
Summary
Basic proteins like histones significantly boost bull seminal ribonuclease (RNase) activity and stability. This interaction suggests a crucial role for basic proteins in regulating RNase function.
Area of Science:
- Biochemistry
- Enzymology
- Molecular Biology
Background:
- Bull seminal ribonuclease (RNase) is an enzyme with potential biological significance.
- The regulation of enzyme activity is crucial for understanding biological processes.
Purpose of the Study:
- To investigate the effect of various proteins on the activity of purified bull seminal RNase.
- To determine if basic proteins influence bull seminal RNase activity and stability.
Main Methods:
- Purification of bull seminal RNase.
- Assay of RNase activity in the presence of different proteins (basic and non-basic).
- Evaluation of enzyme-stabilizing properties.
Main Results:
- Basic proteins, including histones, high-mobility group chromosomal proteins, and cytochrome c, markedly stimulated bull seminal RNase activity (4-6 fold at half substrate RNA concentration).
- Non-basic proteins like bovine serum albumin and human gamma-globulin showed significantly less stimulation.
- Basic proteins also exhibited a notable enzyme-stabilizing effect on bull seminal RNase.
Conclusions:
- Basic proteins are potent activators and stabilizers of bull seminal RNase.
- A strong interaction exists between bull seminal RNase and basic proteins, suggesting a regulatory mechanism.