Record Information
Version1.0
Creation Date2016-09-30 22:27:37 UTC
Update Date2020-06-04 20:58:01 UTC
MCDB ID BMDB0000267
Secondary Accession Numbers
  • BMDB00267
Metabolite Identification
Common NamePyroglutamic acid
DescriptionPyroglutamic acid, also known as pyroglutamate or pidolate, magnesium, belongs to the class of organic compounds known as alpha amino acids and derivatives. These are amino acids in which the amino group is attached to the carbon atom immediately adjacent to the carboxylate group (alpha carbon), or a derivative thereof. Pyroglutamic acid is possibly soluble (in water) and an extremely weak basic (essentially neutral) compound (based on its pKa). Pyroglutamic acid exists in all living species, ranging from bacteria to humans. Pyroglutamic acid is a potentially toxic compound.
Structure
Thumb
Synonyms
ValueSource
(-)-2-Pyrrolidone-5-carboxylic acidChEBI
(S)-(-)-2-Pyrrolidone-5-carboxylic acidChEBI
(S)-Pyroglutamic acidChEBI
5-Pyrrolidone-2-carboxylic acidChEBI
L-5-Pyrrolidone-2-carboxylic acidChEBI
L-Pyroglutamic acidChEBI
Pidolic acidChEBI
PyroglutamateChEBI
5-oxo-L-ProlineKegg
(-)-2-Pyrrolidone-5-carboxylateGenerator
(S)-(-)-2-Pyrrolidone-5-carboxylateGenerator
(S)-PyroglutamateGenerator
5-Pyrrolidone-2-carboxylateGenerator
L-5-Pyrrolidone-2-carboxylateGenerator
L-PyroglutamateGenerator
PidolateGenerator
(-)-PyroglutamateHMDB
(-)-Pyroglutamic acidHMDB
(5S)-2-Oxopyrrolidine-5-carboxylateHMDB
(5S)-2-Oxopyrrolidine-5-carboxylic acidHMDB
(S)-(-)-g-Butyrolactam-g-carboxylateHMDB
(S)-(-)-g-Butyrolactam-g-carboxylic acidHMDB
(S)-(-)-gamma-Butyrolactam-gamma-carboxylateHMDB
(S)-(-)-gamma-Butyrolactam-gamma-carboxylic acidHMDB
(S)-2-Pyrrolidone-5-carboxylateHMDB
(S)-2-Pyrrolidone-5-carboxylic acidHMDB
(S)-5-oxo-2-PyrrolidinecarboxylateHMDB
(S)-5-oxo-2-Pyrrolidinecarboxylic acidHMDB
2-L-Pyrrolidone-5-carboxylateHMDB
2-L-Pyrrolidone-5-carboxylic acidHMDB
2-Oxopyrrolidine-5(S)-carboxylateHMDB
2-Oxopyrrolidine-5(S)-carboxylic acidHMDB
2-Pyrrolidinone-5-carboxylateHMDB
2-Pyrrolidinone-5-carboxylic acidHMDB
5-Carboxy-2-pyrrolidinoneHMDB
5-L-OxoprolineHMDB
5-OxoprolineHMDB
5-Pyrrolidinone-2-carboxylateHMDB
5-Pyrrolidinone-2-carboxylic acidHMDB
Ajidew a 100HMDB
GlutimateHMDB
Glutimic acidHMDB
GlutiminateHMDB
Glutiminic acidHMDB
L-2-Pyrrolidone-5-carboxylateHMDB
L-2-Pyrrolidone-5-carboxylic acidHMDB
L-5-Carboxy-2-pyrrolidinoneHMDB
L-5-oxo-2-PyrrolidinecarboxylateHMDB
L-5-oxo-2-Pyrrolidinecarboxylic acidHMDB
L-5-OxoprolineHMDB
L-Glutamic acid g-lactamHMDB
L-GlutimateHMDB
L-Glutimic acidHMDB
L-GlutiminateHMDB
L-Glutiminic acidHMDB
L-PyrrolidinonecarboxylateHMDB
L-Pyrrolidinonecarboxylic acidHMDB
L-PyrrolidonecarboxylateHMDB
L-Pyrrolidonecarboxylic acidHMDB
OxoprolineHMDB
OxopyrrolidinecarboxylateHMDB
Oxopyrrolidinecarboxylic acidHMDB
PidolidoneHMDB
PyrrolidinonecarboxylateHMDB
Pyrrolidinonecarboxylic acidHMDB
Pyrrolidone-5-carboxylateHMDB
Pyrrolidone-5-carboxylic acidHMDB
Pyrrolidonecarboxylic acidHMDB
5-KetoprolineHMDB
Pidolate, magnesiumHMDB
5-Oxopyrrolidine-2-carboxylic acidHMDB
Magnesium pidolateHMDB
2-Pyrrolidone-5-carboxylic acidHMDB
5-OxoprolinateHMDB
PCAHMDB
Chemical FormulaC5H7NO3
Average Molecular Weight129.114
Monoisotopic Molecular Weight129.042593095
IUPAC Name(2S)-5-oxopyrrolidine-2-carboxylic acid
Traditional Namepyroglutamic acid
CAS Registry Number98-79-3
SMILES
OC(=O)[C@@H]1CCC(=O)N1
InChI Identifier
InChI=1S/C5H7NO3/c7-4-2-1-3(6-4)5(8)9/h3H,1-2H2,(H,6,7)(H,8,9)/t3-/m0/s1
InChI KeyODHCTXKNWHHXJC-VKHMYHEASA-N
Chemical Taxonomy
Description belongs to the class of organic compounds known as alpha amino acids and derivatives. These are amino acids in which the amino group is attached to the carbon atom immediately adjacent to the carboxylate group (alpha carbon), or a derivative thereof.
KingdomOrganic compounds
Super ClassOrganic acids and derivatives
ClassCarboxylic acids and derivatives
Sub ClassAmino acids, peptides, and analogues
Direct ParentAlpha amino acids and derivatives
Alternative Parents
Substituents
  • Alpha-amino acid or derivatives
  • Pyrroline carboxylic acid
  • Pyrroline carboxylic acid or derivatives
  • Pyrroline
  • Cyclic carboximidic acid
  • Lactim
  • Carboxylic acid
  • Monocarboxylic acid or derivatives
  • Propargyl-type 1,3-dipolar organic compound
  • Organic 1,3-dipolar compound
  • Azacycle
  • Organoheterocyclic compound
  • Organopnictogen compound
  • Organic oxygen compound
  • Organooxygen compound
  • Organic oxide
  • Hydrocarbon derivative
  • Carbonyl group
  • Organic nitrogen compound
  • Organonitrogen compound
  • Aliphatic heteromonocyclic compound
Molecular FrameworkAliphatic heteromonocyclic compounds
External Descriptors
Physical Properties
StateSolid
Experimental Properties
PropertyValueReference
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water Solubility476 mg/mL at 13 °CNot Available
LogPNot AvailableNot Available
Predicted Properties
PropertyValueSource
logP-1ALOGPS
logP-0.89ChemAxon
logS0.07ALOGPS
pKa (Strongest Acidic)3.61ChemAxon
pKa (Strongest Basic)-2.2ChemAxon
Physiological Charge-1ChemAxon
Hydrogen Acceptor Count3ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area66.4 ŲChemAxon
Rotatable Bond Count1ChemAxon
Refractivity28.09 m³·mol⁻¹ChemAxon
Polarizability11.56 ųChemAxon
Number of Rings1ChemAxon
Bioavailability1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterNoChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
Spectra
Spectrum TypeDescriptionSplash KeyDeposition DateView
GC-MSGC-MS Spectrum - GC-EI-TOF (Pegasus III TOF-MS system, Leco; GC 6890, Agilent Technologies) (2 TMS)splash10-0ab9-8900000000-f79dc90370ba38f587c92014-06-16View Spectrum
GC-MSGC-MS Spectrum - GC-EI-TOF (Non-derivatized)splash10-0ab9-8900000000-f79dc90370ba38f587c92017-09-12View Spectrum
GC-MSGC-MS Spectrum - GC-EI-TOF (Non-derivatized)splash10-0a4i-0900000000-90fb43273551aeb9b2c42017-09-12View Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-0a6r-9000000000-130a8f31f82e83c4be072016-09-22View Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (1 TMS) - 70eV, Positivesplash10-05fr-9200000000-d69b52257404ab658d5b2017-10-06View Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, PositiveNot Available2021-10-12View Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (TMS_1_2) - 70eV, PositiveNot Available2021-11-05View Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (TBDMS_1_1) - 70eV, PositiveNot Available2021-11-05View Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (TBDMS_1_2) - 70eV, PositiveNot Available2021-11-05View Spectrum
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 10V, Positive (Annotated)splash10-001i-9500000000-ebc64308ec5d5bdb303e2012-07-24View Spectrum
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 25V, Positive (Annotated)splash10-053r-9000000000-7377cb17491942e9589c2012-07-24View Spectrum
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 40V, Positive (Annotated)splash10-053u-9000000000-fcab1396867356ebd6ae2012-07-24View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 10V, Negativesplash10-004i-0900000000-5b0c6536e1b3217b85442012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 20V, Negativesplash10-004i-0900000000-c30ac0bd264c8007ef922012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 30V, Negativesplash10-004i-5900000000-ea3a164653e4235716ae2012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 40V, Negativesplash10-0f89-9000000000-f6620738e68f990d05942012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 50V, Negativesplash10-0udi-9000000000-7937bee2e9a6d6b29cbd2012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 10V, Negativesplash10-004i-0900000000-f20401903b234914b9362012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 20V, Negativesplash10-004i-0900000000-9446bb65e0edd72cfd592012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 30V, Negativesplash10-0059-7900000000-74eccdeb9f0d5fd176142012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 40V, Negativesplash10-0f8a-9000000000-8786a9cd5e488192f34d2012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 50V, Negativesplash10-0f6t-9000000000-ebcc1ac4acd525218e802012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 10V, Positivesplash10-01q9-2900000000-754ae9b699ec1b22cd762012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 20V, Positivesplash10-001i-9300000000-eabb8c4dc0d1111e04312012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 30V, Positivesplash10-00lr-9100000000-1dd17702aee7e5bce6182012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 40V, Positivesplash10-067i-9000000000-c9669794d3a8746be4982012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 50V, Positivesplash10-014i-9000000000-9e103abb0a6ed890051e2012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 10V, Positivesplash10-03e9-3900000000-da8cf252285c1d6165862012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 20V, Positivesplash10-01q9-9400000000-96a7fe5a81188c49d1ba2012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 30V, Positivesplash10-014i-9000000000-356215339a43217dea662012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 40V, Positivesplash10-02vl-9000000000-ed47ec6e675eb338da192012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 50V, Positivesplash10-014i-9000000000-f647da344adbdf7bfb1b2012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF (UPLC Q-Tof Premier, Waters) , Positivesplash10-001i-9200000000-0bddc68d58c6fb981d1a2012-08-31View Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF (UPLC Q-Tof Premier, Waters) , Negativesplash10-004i-0900000000-c70c79fa828bbf137ebc2012-08-31View Spectrum
MSMass Spectrum (Electron Ionization)splash10-001i-9000000000-6c87253da642bb4800df2019-05-16View Spectrum
1D NMR1H NMR Spectrum (1D, 600 MHz, H2O, experimental)Not Available2012-12-04View Spectrum
1D NMR13C NMR Spectrum (1D, 100 MHz, D2O, predicted)Not Available2021-09-29View Spectrum
1D NMR1H NMR Spectrum (1D, 100 MHz, D2O, predicted)Not Available2021-09-29View Spectrum
1D NMR13C NMR Spectrum (1D, 1000 MHz, D2O, predicted)Not Available2021-09-29View Spectrum
1D NMR1H NMR Spectrum (1D, 1000 MHz, D2O, predicted)Not Available2021-09-29View Spectrum
1D NMR13C NMR Spectrum (1D, 200 MHz, D2O, predicted)Not Available2021-09-29View Spectrum
1D NMR1H NMR Spectrum (1D, 200 MHz, D2O, predicted)Not Available2021-09-29View Spectrum
1D NMR13C NMR Spectrum (1D, 300 MHz, D2O, predicted)Not Available2021-09-29View Spectrum
1D NMR1H NMR Spectrum (1D, 300 MHz, D2O, predicted)Not Available2021-09-29View Spectrum
1D NMR13C NMR Spectrum (1D, 400 MHz, D2O, predicted)Not Available2021-09-29View Spectrum
1D NMR1H NMR Spectrum (1D, 400 MHz, D2O, predicted)Not Available2021-09-29View Spectrum
1D NMR13C NMR Spectrum (1D, 500 MHz, D2O, predicted)Not Available2021-09-29View Spectrum
1D NMR1H NMR Spectrum (1D, 500 MHz, D2O, predicted)Not Available2021-09-29View Spectrum
1D NMR13C NMR Spectrum (1D, 600 MHz, D2O, predicted)Not Available2021-09-29View Spectrum
1D NMR1H NMR Spectrum (1D, 600 MHz, D2O, predicted)Not Available2021-09-29View Spectrum
1D NMR13C NMR Spectrum (1D, 700 MHz, D2O, predicted)Not Available2021-09-29View Spectrum
1D NMR1H NMR Spectrum (1D, 700 MHz, D2O, predicted)Not Available2021-09-29View Spectrum
1D NMR13C NMR Spectrum (1D, 800 MHz, D2O, predicted)Not Available2021-09-29View Spectrum
1D NMR1H NMR Spectrum (1D, 800 MHz, D2O, predicted)Not Available2021-09-29View Spectrum
1D NMR13C NMR Spectrum (1D, 900 MHz, D2O, predicted)Not Available2021-09-29View Spectrum
1D NMR1H NMR Spectrum (1D, 900 MHz, D2O, predicted)Not Available2021-09-29View Spectrum
2D NMR[1H, 13C]-HSQC NMR Spectrum (2D, 600 MHz, H2O, experimental)Not Available2012-12-05View Spectrum
Concentrations
StatusValueReferenceDetails
Detected but not QuantifiedNot Applicable
  • Kurt J. Boudonck,...
details
Detected but not QuantifiedNot Applicable details
Detected but not QuantifiedNot Applicable
  • Kurt J. Boudonck,...
details
HMDB IDHMDB0000267
DrugBank IDDB03088
Phenol Explorer Compound IDNot Available
FoodDB IDFDB014506
KNApSAcK IDC00007403
Chemspider IDNot Available
KEGG Compound IDC01879
BioCyc ID5-OXOPROLINE
BiGG IDNot Available
Wikipedia LinkPyroglutamic_acid
METLIN IDNot Available
PubChem Compound7405
PDB IDNot Available
ChEBI ID18183
References
Synthesis ReferencePumpor, Ksenia; Boettcher, Christoph; Fehn, Susanna; Burger, Klaus. Hexafluoroacetone as protecting and activating reagent: an efficient strategy for activation of pyroglutamic acid and homologs.Heterocycles (2003), 61 259-269.
Material Safety Data Sheet (MSDS)Download (PDF)
General References
  1. Melzer N, Wittenburg D, Hartwig S, Jakubowski S, Kesting U, Willmitzer L, Lisec J, Reinsch N, Repsilber D: Investigating associations between milk metabolite profiles and milk traits of Holstein cows. J Dairy Sci. 2013 Mar;96(3):1521-34. doi: 10.3168/jds.2012-5743. [PubMed:23438684 ]
  2. Sun HZ, Shi K, Wu XH, Xue MY, Wei ZH, Liu JX, Liu HY: Lactation-related metabolic mechanism investigated based on mammary gland metabolomics and 4 biofluids' metabolomics relationships in dairy cows. BMC Genomics. 2017 Dec 2;18(1):936. doi: 10.1186/s12864-017-4314-1. [PubMed:29197344 ]
  3. Qian L, Zhao A, Zhang Y, Chen T, Zeisel SH, Jia W, Cai W: Metabolomic Approaches to Explore Chemical Diversity of Human Breast-Milk, Formula Milk and Bovine Milk. Int J Mol Sci. 2016 Dec 17;17(12). pii: ijms17122128. doi: 10.3390/ijms17122128. [PubMed:27999311 ]
  4. Kurt J. Boudonck, Matthew W. Mitchell, Jacob Wulff and John A. Ryals (2009). Kurt J. Boudonck, Matthew W. Mitchell, Jacob Wulff and John A. Ryals. Characterization of the biochemical variability of bovine milk using metabolomics. Metabolomics (2009) 5:375?386. Metabolomics.
  5. Kurt J. Boudonck, Matthew W. Mitchell, Jacob Wulff and John A. Ryals (2009). Kurt J. Boudonck, Matthew W. Mitchell, Jacob Wulff, John A. Ryals. Characterization of the biochemical variability of bovine milk using metabolomics. Metabolomics (2009) 5:375-386 doi: 10.1007/s11306-009-0160-8. Metabolomics.