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Structure of hypothalamic coronaro-constrictory peptide factors
N Barkhudaryan1, W Oberthuer, F Lottspeich
1Institute of Biochemistry Armenian Academy of Science, Yerevan.
Neurochemical Research
|December 1, 1992
Summary
Researchers identified bovine hypothalamic peptides with coronaro-constrictory properties. These peptides were found to be fragments of bovine hemoglobin beta-chain, confirmed through synthesis and functional assays.
Area of Science:
- Biochemistry
- Peptide Chemistry
- Physiology
Background:
- Coronaro-constrictory peptides have been isolated from the bovine hypothalamus.
- The structural identification of these peptides is crucial for understanding their function.
Purpose of the Study:
- To determine the amino acid sequences of three coronaro-constrictory peptide factors from bovine hypothalamus.
- To investigate the origin and synthetic feasibility of these identified peptides.
Main Methods:
- Amino acid analysis and Edman degradation were used to determine peptide structures.
- Computer database searches identified the peptide sequences as bovine hemoglobin beta-chain fragments.
- Solid-phase peptide synthesis was employed to create synthetic versions of two peptides.
Main Results:
- Three coronaro-constrictory peptides (P1, P2, P3) were structurally characterized.
- The sequences corresponded to bovine hemoglobin beta-chain fragments (33-37, 33-38, and 32-38).
- Synthetic peptides P2 and P3 exhibited coronaro-constrictory properties.
Conclusions:
- Hypothalamic coronaro-constrictory peptides are likely fragments of bovine hemoglobin beta-chain.
- The in vivo formation of these peptides is a plausible biological mechanism.
- Further research is warranted to explore the physiological implications.