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The structure of bovine rhodopsin
Biophysics of Structure and Mechanism
|January 1, 1983
Summary
Researchers determined the complete protein sequence of rhodopsin by analyzing peptides from a cyanogen bromide digest. This sequence data aids in predicting rhodopsin
Area of Science:
- Biochemistry
- Molecular Biology
- Structural Biology
Background:
- Rhodopsin is a key visual pigment protein.
- Understanding its structure is crucial for visual phototransduction.
Purpose of the Study:
- To determine the complete amino acid sequence of rhodopsin.
- To predict the secondary structure and membrane arrangement of rhodopsin.
Main Methods:
- Cyanogen bromide (CNBr) digestion of rhodopsin to isolate peptides.
- Analysis of methionine-containing peptides from various digests to order CNBr peptides.
- Sequencing of individual peptides.
Main Results:
- Successfully isolated 16 peptides from a CNBr digest, covering the entire rhodopsin composition.
- Established the complete amino acid sequence of rhodopsin.
- Most CNBr peptides were sequenced.
Conclusions:
- The determined rhodopsin sequence provides a foundation for predicting its secondary structure.
- Insights into rhodopsin's arrangement within the disk membrane were gained.
- This work integrates data for a comprehensive understanding of rhodopsin structure and function.