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Descriptor English: Proinsulin
Descriptor Spanish: Proinsulina
Descriptor proinsulina
Scope note: Polipéptido pancreático de unos 110 aminoácidos, dependiendo de las especies, que es el precursor de la insulina. La proinsulina es producida por las CÉLULAS BETA PANCREÁTICAS y consta secuencialmente de la cadena N-terminal B, el péptido C de conexión, que puede escindirse mediante proteólisis, y la cadena C-terminal A. También contiene tres enlaces disulfuro, dos de ellos entre la cadena A y la cadena B. Después de la escisión en dos lugares, los productos secretados son la insulina y el péptido C. También se secreta en pequeñas cantidades proinsulina intacta, cuya bioactividad es escasa.
Descriptor Portuguese: Proinsulina
Descriptor French: Proinsuline
Tree number(s): D06.472.699.587.200.500
D12.644.548.586.200.500
D12.776.811.706
RDF Unique Identifier: https://id.nlm.nih.gov/mesh/D011384
Scope note: A pancreatic polypeptide of about 110 amino acids, depending on the species, that is the precursor of insulin. Proinsulin, produced by the PANCREATIC BETA CELLS, is comprised sequentially of the N-terminal B-chain, the proteolytically removable connecting C-peptide, and the C-terminal A-chain. It also contains three disulfide bonds, two between A-chain and B-chain. After cleavage at two locations, insulin and C-peptide are the secreted products. Intact proinsulin with low bioactivity also is secreted in small amounts.
Allowable Qualifiers: AD administration & dosage
AE adverse effects
AG agonists
AI antagonists & inhibitors
AN analysis
BI biosynthesis
BL blood
CF cerebrospinal fluid
CH chemistry
CL classification
CS chemical synthesis
DE drug effects
DF deficiency
EC economics
GE genetics
HI history
IM immunology
IP isolation & purification
ME metabolism
PD pharmacology
PH physiology
PK pharmacokinetics
PO poisoning
RE radiation effects
SD supply & distribution
ST standards
TO toxicity
TU therapeutic use
UL ultrastructure
UR urine
Registry Number: 9035-68-1
CAS Type 1 Name: Proinsulin
Previous Indexing: Insulin (1966-1971)
Public MeSH Note: 72
History Note: 72
DeCS ID: 11816
Unique ID: D011384
NLM Classification: WK 820
Documents indexed in the Virtual Health Library (VHL): Click here to access the VHL documents
Date Established: 1972/01/01
Date of Entry: 1999/01/01
Revision Date: 2011/06/24
Proinsulin - Preferred
Concept UI M0017685
Scope note A pancreatic polypeptide of about 110 amino acids, depending on the species, that is the precursor of insulin. Proinsulin, produced by the PANCREATIC BETA CELLS, is comprised sequentially of the N-terminal B-chain, the proteolytically removable connecting C-peptide, and the C-terminal A-chain. It also contains three disulfide bonds, two between A-chain and B-chain. After cleavage at two locations, insulin and C-peptide are the secreted products. Intact proinsulin with low bioactivity also is secreted in small amounts.
Preferred term Proinsulin



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