IUBMB Enzyme Nomenclature


Accepted name: pantoate—β-alanine ligase (AMP-forming)

Reaction: ATP + (R)-pantoate + β-alanine = AMP + diphosphate + (R)-pantothenate

For diagram of reaction click here.

Glossary: (R)-pantoate = (2R)-2,4-dihydroxy-3,3-dimethylbutanoate
(R)-pantothenate = 3-[(2R)-2,4-dihydroxy-3,3-dimethylbutanamido]propanoate

Other name(s): pantothenate synthetase; pantoate activating enzyme; pantoic-activating enzyme; D-pantoate:β-alanine ligase (AMP-forming); pantoate—β-alanine ligase (ambiguous)

Systematic name: (R)-pantoate:β-alanine ligase (AMP-forming)

Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number: 9023-49-8


1. Ginoza, H.S. and Altenbern, R.A. The pantothenate-synthesizing enzyme cell-free extracts of Brucella abortus, strain 19. Arch. Biochem. Biophys. 56 (1955) 537-541. [PMID: 14377603]

2. Maas, W.K. Pantothenate studies. III. Description of the extracted pantothenate-synthesizing enzyme of Escherichia coli. J. Biol. Chem. 198 (1952) 23-32. [PMID: 12999714]

3. Maas, W.K. Mechanism of the enzymatic synthesis of pantothenate from β-alanine and pantoate. Fed. Proc. 15 (1956) 305-306.

[EC created 1961, modified 2014]

Return to EC 6.3.2 home page
Return to EC 6.3 home page
Return to EC 6 home page
Return to Enzymes home page
Return to IUBMB Biochemical Nomenclature home page