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S-100 protein synthesis by isolated polyribosomes from rat brain
Science (New York, N.Y.)
|December 1, 1972
Summary
Researchers identified the S-100 protein, a nervous system specific protein, synthesized in a cell-free system using rat brain polyribosomes. This study confirms the organ specificity of in vitro synthesized proteins.
Area of Science:
- Neuroscience
- Molecular Biology
- Biochemistry
Background:
- The nervous system possesses unique proteins crucial for its function.
- Cell-free protein synthesis systems allow for the study of specific protein production.
- Polyribosomes are key structures involved in protein synthesis.
Purpose of the Study:
- To investigate the synthesis of a nervous system-specific protein in a cell-free system.
- To confirm the organ specificity of proteins synthesized in vitro.
- To quantify the presence of the S-100 protein in synthesized products.
Main Methods:
- Utilizing a cell-free system for protein synthesis.
- Analyzing radioactive proteins released from rat brain polyribosomes.
- Comparing protein synthesis from rat brain and rat liver polyribosomes.
Main Results:
- Radioactive proteins were synthesized and released from rat brain polyribosomes.
- The S-100 protein was detected among the synthesized radioactive proteins.
- The S-100 protein constituted 0.15% of the radioactive proteins from brain polyribosomes, demonstrating organ specificity.
Conclusions:
- The S-100 protein, a nervous system specific marker, can be synthesized in a cell-free system.
- In vitro protein synthesis using polyribosomes exhibits organ specificity.
- This methodology allows for the study of specific protein expression in neural tissues.