Xenobiotic
Record Information
Version2.0
StatusDetected and Quantified
Creation Date2020-12-10 18:52:05 UTC
Update Date2026-03-26 16:15:20 UTC
Metabolite IDMMDBc0000657
Metabolite Identification
Common NameBeta-Guanidinopropionic acid
DescriptionGuanidinopropionic acid (GPA), also known as guanidinopropionate or 3-guanidinopropionic acid or beta-guanidinopropionic acid, belongs to the class of organic compounds known as guanidines. Guanidines are compounds containing a guanidine moiety, with the general structure (R1R2N)(R3R4N)C=N-R5. GPA (C₄H₉N₃O₂) is structurally related to creatine that has been detected at low levels in mammalian tissues including blood, brain, liver, kidney, and urine, suggesting a minor endogenous origin possibly arising through transamidination reactions between arginine and β-alanine occurring in the kidney (PMID: 1312834 ; PMID: 33890206 ). Functionally, GPA acts as a competitive inhibitor of creatine transport, entering cells via the creatine transporter and reducing intracellular creatine and phosphocreatine levels, thereby disrupting the creatine kinase energy-buffering system. This induces a state of cellular energy stress, activating adaptive pathways such as AMP-activated protein kinase and promoting shifts toward oxidative metabolism, which has led to its widespread use as an experimental tool to study muscle energetics, mitochondrial function, and metabolic regulation (PMID: 33890206 ). In animal models, GPA administration has been associated with decreased phosphocreatine levels in muscle and heart, improved insulin sensitivity, reduced adiposity, and alterations in brown adipose tissue metabolism, although chronic exposure can impair growth and muscle function. GPA is typically synthesized chemically through reactions that introduce a guanidino group onto a propionic acid backbone using guanidine derivatives and activated intermediates. While GPA does not play a major essential physiological role in humans, it is increasingly recognized as a guanidino compound that can accumulate under conditions of impaired renal function, where it may contribute to the pool of uremic toxins (PMID: 3960241 ). In this context, elevated GPA levels may exacerbate metabolic disturbances by interfering with cellular energy homeostasis and contributing to mitochondrial dysfunction, highlighting its potential relevance in chronic kidney disease and related metabolic complications.
Structure
Synonyms
ValueSource
3-GuanidinopropanoateChEBI
beta-GPAChEBI
N-[Amino(imino)methyl]-beta-alanineChEBI
Guanidinopropionic acidKegg
3-Guanidinopropanoic acidGenerator
b-GPAGenerator
Β-gpaGenerator
N-[Amino(imino)methyl]-b-alanineGenerator
N-[Amino(imino)methyl]-β-alanineGenerator
GuanidinopropionateGenerator
b-GuanidinopropionateGenerator
b-Guanidinopropionic acidGenerator
beta-GuanidinopropionateGenerator
Β-guanidinopropionateGenerator
Β-guanidinopropionic acidGenerator
3-Guanidinopropionic acidHMDB
beta-GuanadinopropionateHMDB
beta-Guanidinopropionic acid.HMDB
beta-Guanidine propionic acidMeSH, HMDB
Guanidine propionateMeSH, HMDB
beta-Guanidinopropionic acidChEBI
Amidino beta-alanineMeSH
Molecular FormulaC4H9N3O2
Average Mass131.1332
Monoisotopic Mass131.069476547
IUPAC Name3-carbamimidamidopropanoic acid
Traditional Name3-guanidinopropanoic acid
CAS Registry NumberNot Available
SMILES
NC(=N)NCCC(O)=O
InChI Identifier
InChI=1S/C4H9N3O2/c5-4(6)7-2-1-3(8)9/h1-2H2,(H,8,9)(H4,5,6,7)
InChI KeyKMXXSJLYVJEBHI-UHFFFAOYSA-N