Related Experiment Videos
Complementary DNA sequence of lamprey fibrinogen beta chain
Biochemistry
|October 21, 1986
Summary
Researchers sequenced the lamprey fibrinogen beta chain, finding 49% identity with the human version. Key conserved regions suggest similar functions despite evolutionary divergence in this essential blood clotting protein.
Area of Science:
- Biochemistry
- Molecular Biology
- Evolutionary Biology
Background:
- Fibrinogen is a crucial blood protein involved in clot formation.
- Understanding fibrinogen evolution across species provides insights into its structure-function relationships.
Purpose of the Study:
- To determine the cDNA sequence of the beta chain of lamprey fibrinogen.
- To compare the lamprey fibrinogen beta chain with its human counterpart.
Main Methods:
- Synthesis of an oligonucleotide probe based on the lamprey fibrinogen beta chain's amino acid sequence.
- DNA sequencing of the beta chain cDNA, including coding and noncoding regions.
- Verification of the inferred amino acid sequence using protein fragments and consensus sequences.
Main Results:
- The complete cDNA sequence of the lamprey fibrinogen beta chain was determined.
- The inferred amino acid sequence showed 49% identity to the human fibrinogen beta chain.
- Conserved regions were identified, similar to those found in lamprey and human gamma chains.
Conclusions:
- The lamprey fibrinogen beta chain shares significant sequence identity and conserved regions with human fibrinogen beta chain.
- These findings aid in understanding the evolutionary conservation of fibrinogen structure and function.
- Observed similarities and differences can help explain variations in fibrinogen's physiological roles.