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Gene and precursor structures of human C-type natriuretic peptide
Y Tawaragi1, K Fuchimura, S Tanaka
1Suntory Institute for Biomedical Research, Osaka, Japan.
Biochemical and Biophysical Research Communications
|March 15, 1991
Summary
Researchers isolated the human C-type natriuretic peptide (CNP) gene, identifying two major endogenous forms, CNP-22 and CNP-53. Human CNP-53 exhibits diuretic and hypotensive effects in rats, similar to porcine CNP-53.
Area of Science:
- Molecular Biology
- Endocrinology
- Genetics
Background:
- C-type natriuretic peptide (CNP) is a biologically active peptide hormone.
- Understanding the human CNP gene is crucial for its physiological roles.
Purpose of the Study:
- To isolate and characterize the human C-type natriuretic peptide (CNP) gene.
- To identify endogenous CNP forms in humans and assess their biological activity.
Main Methods:
- Human genomic library screening using a porcine CNP DNA probe.
- Amino acid sequence comparison of human, porcine, and rat prepro-CNPs.
- Intravenous injection of human CNP-53 in anesthetized rats.
Main Results:
- Isolated the human CNP gene, encoding a 126-residue precursor (prepro-CNP).
- Identified human CNP-22 and CNP-53 as major endogenous forms.
- Human CNP-53 showed diuretic-natriuretic and hypotensive activities in rats, comparable to porcine CNP-53 but less potent than alpha-ANP.
Conclusions:
- The human CNP gene structure and processing pathways have been elucidated.
- Human CNP-53 possesses significant physiological activities, contributing to natriuresis and blood pressure regulation.
- Comparative analysis reveals species-specific variations in CNP-53 structure.