Common Name(2s,3s)-2-methylcitrate
DescriptionMethylcitric acid (MCA) is elevated in body fluids of patients with propionic acidaemia (PA; OMIM 232000 , 232050 ), methylmalonic aciduria (MMA; OMIM 251000 , 251120 ) and multiple carboxylase deficiency (OMIM 253260 , 253270 ), which are inherited disorders. MCA is formed by condensation of accumulated propionyl- CoA and oxalacetate by the enzyme si-citrate synthase (EC 4.1.3.7). MCA molecule has two stereogenic centers so that it can occur in the form of four stereoisomers. Only two stereoisomers of MCA, (2S, 3S) and (2R, 3S), were found in human urine (PMID: 17295121 ).
Structure
Molecular FormulaC7H10O7
Average Mass206.15010
Monoisotopic Mass206.04265
IUPAC Name2-hydroxy-1-methylpropane-1,2,3-tricarboxylic acid
Traditional Name2-methylcitric acid
CAS Registry Number6061-96-7
SMILESC[C@H](C(=O)[O-])[C@@](O)(CC(=O)[O-])C(=O)[O-]
InChI IdentifierInChI=1S/C7H10O7/c1-3(5(10)11)7(14,6(12)13)2-4(8)9/h3,14H,2H2,1H3,(H,8,9)(H,10,11)(H,12,13)
InChI KeyYNOXCRMFGMSKIJ-UHFFFAOYSA-N
CHEBI IDCHEBI:58853
HMDB IDHMDB0000379
StateSolid
Water Solubility1.75e+02 g/l
logP-0.89
logS-0.07
pKa (Strongest Acidic)3.18
pKa (Strongest Basic)-4.26
Hydrogen Acceptor Count7
Hydrogen Donor Count4
Polar Surface Area132.13 Ų
Rotatable Bond Count5
Physiological Charge-3
Formal Charge0
Refractivity40.20 m³·mol⁻¹
Polarizability17.21

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