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Dental enamel matrix: sequences of two amelogenin polypeptides
Bioscience Reports
|October 1, 1981
Summary
Researchers determined the amino acid sequences of leucine-rich amelogenin polypeptide (LRAP) and tyrosine-rich amelogenin polypeptide (TRAP) from bovine enamel. They found identical sequences for the first 33 residues, with significant differences thereafter.
Area of Science:
- Biochemistry
- Molecular Biology
- Dental Enamel Research
Background:
- Amelogenins are key proteins in tooth enamel formation.
- Understanding amelogenin structure is crucial for enamel development research.
- Foetal bovine enamel matrix is a source for studying these proteins.
Purpose of the Study:
- To determine the amino acid sequences of leucine-rich amelogenin polypeptide (LRAP) and tyrosine-rich amelogenin polypeptide (TRAP).
- To investigate variations in the molecular forms of LRAP and TRAP.
- To compare the sequence homology between LRAP and TRAP.
Main Methods:
- Isolation of polypeptides from foetal bovine enamel matrix.
- Amino acid sequencing techniques to determine polypeptide structures.
- Analysis of molecular species and sequence comparisons.
Main Results:
- The amino acid sequences of LRAP and TRAP were elucidated.
- Both proteins were found in two forms, differing in COOH-terminal length.
- LRAP and TRAP shared identical sequences for the initial 33 residues, with marked divergence in the subsequent 12 residues.
Conclusions:
- The study provides detailed sequence information for LRAP and TRAP.
- Sequence similarities and differences offer insights into amelogenin structure-function relationships.
- These findings contribute to the understanding of enamel matrix protein organization.