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Tubulin amino acid sequence and consequences.
Journal of Submicroscopic Cytology
|January 1, 1983
Summary
Tubulin subunits from pig brain show significant sequence identity and conservation, with variations indicating multiple alpha and beta-tubulin variants. Cysteine 201 in beta-tubulin may play a role in colchicine binding.
Area of Science:
- Biochemistry
- Molecular Biology
- Cell Biology
Background:
- Tubulin is a key component of microtubules, essential for cell structure and division.
- Understanding tubulin structure and function is crucial for cell biology research.
Purpose of the Study:
- To analyze the primary structure and sequence identity of alpha- and beta-tubulin from pig brain.
- To identify potential functional regions and conserved residues within tubulin subunits.
Main Methods:
- Amino acid sequence analysis of pig brain alpha- and beta-tubulin.
- Comparison of tubulin sequences with known protein databases.
Main Results:
- Alpha- and beta-tubulin subunits share 41% sequence identity.
- Identified heterogeneity in several positions, suggesting multiple alpha- and beta-tubulin variants.
- Highly acidic C-terminal regions and potential nucleotide-binding motifs were observed.
- Cysteine at position 201 in beta-tubulin is a potential site for colchicine binding.
Conclusions:
- Pig brain tubulin subunits exhibit high sequence conservation with evidence of multiple variants.
- Specific regions suggest functional roles in nucleotide binding and colchicine interaction.