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calcitonin

File:Human_calcitonin_bound_to_receptor_PDB_7TYO.png · Wikimedia Commons · See Wikimedia Commons

ProteinQ315860· pop 52· linked from 382 articles

calcitonin

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Also known as CGRP-I, KC, alpha-type CGRP, CT, CALC1, CALCA, CGRP, calcitonin 1

Calcitonin is a 32 amino acid peptide hormone secreted by parafollicular cells (also known as C cells) of the thyroid (or endostyle) in humans and other chordates in the ultimopharyngeal body. It acts to reduce blood calcium (Ca2+), opposing the effects of parathyroid hormone (PTH).

Chemical data

Formula
C151H228N40O45S3
Molecular weight
3419.9 g/mol
IUPAC name
(3S)-4-[[(2S)-1-[[(2S)-4-amino-1-[[(2S)-6-amino-1-[[(2S)-1-[[(2S)-1-[[(2S,3R)-1-[[(2S)-1-[(2S)-2-[[(2S)-5-amino-1-[[(2S,3R)-1-[[(2S)-1-[[(2S,3S)-1-[[2-[[(2S)-1-[[2-[[(2S)-1-[(2S)-2-carbamoylpyrrolidin-1-yl]-1-oxopropan-2-yl]amino]-2-oxoethyl]amino]-3-methyl-1-oxobutan-2-yl]amino]-2-oxoethyl]amino]-3-methyl-1-oxopentan-2-yl]amino]-1-oxopropan-2-yl]amino]-3-hydroxy-1-oxobutan-2-yl]amino]-1,5-dioxopentan-2-yl]carbamoyl]pyrrolidin-1-yl]-1-oxo-3-phenylpropan-2-yl]amino]-3-hydroxy-1-oxobutan-2-yl]amino]-3-(1H-imidazol-5-yl)-1-oxopropan-2-yl]amino]-1-oxo-3-phenylpropan-2-yl]amino]-1-oxohexan-2-yl]amino]-1,4-dioxobutan-2-yl]amino]-1-oxo-3-phenylpropan-2-yl]amino]-3-[[(2S)-5-amino-2-[[(2S,3R)-2-[[(2S)-2-[[(2S,3R)-2-[[2-[[(2S)-2-[[(2S)-2-[[(2R)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[(2S)-4-amino-2-[[2-[[(2R)-2-amino-3-sulfanylpropanoyl]amino]acetyl]amino]-4-oxobutanoyl]amino]-4-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-hydroxybutanoyl]amino]-3-sulfanylpropanoyl]amino]-4-methylsulfanylbutanoyl]amino]-4-methylpentanoyl]amino]acetyl]amino]-3-hydroxybutanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]-3-hydroxybutanoyl]amino]-5-oxopentanoyl]amino]-4-oxobutanoic acid
SMILES
CC[C@H](C)[C@@H](C(=O)NCC(=O)N[C@@H](C(C)C)C(=O)NCC(=O)N[C@@H](C)C(=O)N1CCC[C@H]1C(=O)N)NC(=O)[C@H](C)NC(=O)[C@H]([C@@H](C)O)NC(=O)[C@H](CCC(=O)N)NC(=O)[C@@H]2CCCN2C(=O)[C@H](CC3=CC=CC=C3)NC(=O)[C@H]([C@@H](C)O)NC(=O)[C@H](CC4=CN=CN4)NC(=O)[C@H](CC5=CC=CC=C5)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CC(=O)N)NC(=O)[C@H](CC6=CC=CC=C6)NC(=O)[C@H](CC(=O)O)NC(=O)[C@H](CCC(=O)N)NC(=O)[C@H]([C@@H](C)O)NC(=O)[C@H](CC7=CC=C(C=C7)O)NC(=O)[C@H]([C@@H](C)O)NC(=O)CNC(=O)[C@H](CC(C)C)NC(=O)[C@H](CCSC)NC(=O)[C@H](CS)NC(=O)[C@H]([C@@H](C)O)NC(=O)[C@H](CO)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CC(=O)N)NC(=O)CNC(=O)[C@H](CS)N
InChIKey
MKPOFZGVVSUXKS-JKQNMTHDSA-N
XLogP
-11.9
Polar surface area
1390 Ų
H-bond donors
47
H-bond acceptors
51
Formal charge
0

via PubChem

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89 registered

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Encyclopedic overview

19 sections
Contents
  • Biosynthesis and regulation
  • Function
  • Receptor
  • Discovery
  • Clinical significance
  • Pharmacology
  • General characteristics of the active substance
  • Characteristics in patients
  • Preclinical safety data
  • Pharmaceutical manufacture
  • Uses of calcitonin
  • Treatments
  • Diagnostics
  • Structure
  • Research
  • See also
  • References
  • Further reading
  • External links

Calcitonin is a 32 amino acid peptide hormone secreted by parafollicular cells (also known as C cells) of the thyroid (or endostyle) in humans and other chordates in the ultimopharyngeal body. It acts to reduce blood calcium (Ca2+), opposing the effects of parathyroid hormone (PTH).

Its importance in humans has not been as well established as its importance in other animals, as its function is usually not significant in the regulation of normal calcium homeostasis. It belongs to the calcitonin-like protein family.

Excerpted from Wikipedia’s “calcitonin” article, available under the CC BY-SA 4.0 licence.

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