Involved in reducing blood volume and pressure by promoting salt and water excretion in the kidneys, ANP helps to alleviate the strain on the heart.
Common Name:
Atrial Natriuretic Peptide (ANP)
Compound Name:
Atrial Natriuretic Peptide
Chemical Formula:
C126H192N50O35S4
Molecular Weight:
3464.9 g/mol
Sequence and Amino Acid Composition:
- Sequence: Ser-Leu-Arg-Arg-Ser-Ser-Cys-Phe-Gly-Gly-Arg-Ile-Asp-Arg-Ile-Gly-Ala-Gln-Ser-Gly-Leu-Gly-Cys-Asn-Ser-Phe-Arg-Tyr
- Amino Acid Profile:
- Cysteine (C):
- Frequency: 2
- Properties: Contains thiol groups that form an intramolecular disulfide bridge, essential for maintaining structural integrity and biological activity.
- Role in the Peptide: Critical for stabilizing the ring structure of the peptide, which is necessary for receptor binding.
- Arginine (R), Serine (S), and Glycine (G):
- Roles in the Peptide: Arginine enhances the peptide’s natriuretic and diuretic properties; Serine and Glycine contribute to the overall flexibility and bioactivity of the peptide.
- Cysteine (C):
Structure:
ANP is a 28-amino acid peptide with a ring structure formed by a disulfide bridge between two cysteine residues. This structure is crucial for its interaction with natriuretic peptide receptors.
Synthesis Method:
ANP is typically synthesized through solid-phase peptide synthesis, allowing for high purity and consistency essential for research and therapeutic use.
Solubility:
Soluble in water and aqueous buffers, making it suitable for physiological studies and therapeutic formulations.
Stability:
Sensitive to oxidative conditions due to the disulfide bridge; should be stored at low temperatures, preferably in a lyophilized form, to maintain stability.
Function:
ANP is primarily known for its role in reducing blood volume, blood pressure, and sodium concentration, counteracting the effects of the renin-angiotensin system. It is released by cardiac atrial myocytes in response to high blood pressure and stretches the atria of the heart.
Benefits and Uses:
- Clinically used in the diagnosis of heart failure as its levels correlate with heart function.
- Investigated for its therapeutic potential in treating hypertension and potentially as a diuretic agent in conditions like congestive heart failure.
- Studied for its protective roles against cardiac fibrosis and hypertrophy.
Side Effects:
Generally well tolerated; however, excessive use or high levels can lead to hypotension and electrolyte imbalances, requiring careful monitoring when used therapeutically.
Regulatory Status:
Widely recognized and studied in clinical settings for its diagnostic importance in heart function; therapeutic uses are still under investigation.
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