The Enzyme Database

Your query returned 7 entries.    printer_iconPrintable version



EC 1.1.1.106     
Accepted name: pantoate 4-dehydrogenase
Reaction: (R)-pantoate + NAD+ = (R)-4-dehydropantoate + NADH + H+
For diagram of pantothenate catabolism, click here
Glossary: pantoate = 2,4-dihydroxy-3,3-dimethylbutanoate
Other name(s): pantoate dehydrogenase; pantothenase; D-pantoate:NAD+ 4-oxidoreductase
Systematic name: (R)-pantoate:NAD+ 4-oxidoreductase
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number: 37250-38-7
References:
1.  Goodhue, C.T. and Snell, E.E. The bacterial degradation of pantothenic acid. 3. Enzymatic formation of aldopantoic acid. Biochemistry 5 (1966) 403–408. [PMID: 4287370]
[EC 1.1.1.106 created 1972, modified 1976]
 
 
EC 1.1.1.169     
Accepted name: 2-dehydropantoate 2-reductase
Reaction: (R)-pantoate + NADP+ = 2-dehydropantoate + NADPH + H+
For diagram of the early stages of CoA biosynthesis, click here
Glossary: pantoate = 2,4-dihydroxy-3,3-dimethylbutanoate
Other name(s): 2-oxopantoate reductase; 2-ketopantoate reductase; 2-ketopantoic acid reductase; ketopantoate reductase; ketopantoic acid reductase
Systematic name: (R)-pantoate:NADP+ 2-oxidoreductase
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number: 37211-74-8
References:
1.  King, H.L., Jr., Dyar, R.E. and Wilken, D.R. Ketopantoyl lactone and ketopantoic acid reductases. Characterization of the reactions and purification of two forms of ketopantoyl lactone reductase. J. Biol. Chem. 247 (1972) 4689–4695. [PMID: 4603075]
[EC 1.1.1.169 created 1976]
 
 
EC 2.7.1.169     
Accepted name: pantoate kinase
Reaction: ATP + (R)-pantoate = ADP + (R)-4-phosphopantoate
Other name(s): PoK; TK2141 protein
Systematic name: ATP:(R)-pantoate 4-phosphotransferase
Comments: The conversion of (R)-pantoate to (R)-4′-phosphopantothenate is part of the pathway leading to biosynthesis of 4′-phosphopantetheine, an essential cofactor of coenzyme A and acyl-carrier protein. In bacteria and eukaryotes this conversion is performed by condensation with β-alanine, followed by phosphorylation (EC 6.3.2.1 and EC 2.7.1.33, respectively). In archaea the order of these two steps is reversed, and phosphorylation precedes condensation with β-alanine.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
References:
1.  Yokooji, Y., Tomita, H., Atomi, H. and Imanaka, T. Pantoate kinase and phosphopantothenate synthetase, two novel enzymes necessary for CoA biosynthesis in the Archaea. J. Biol. Chem. 284 (2009) 28137–28145. [DOI] [PMID: 19666462]
[EC 2.7.1.169 created 2011]
 
 
EC 3.5.1.22     
Accepted name: pantothenase
Reaction: (R)-pantothenate + H2O = (R)-pantoate + β-alanine
For diagram of pantothenate catabolism, click here
Other name(s): pantothenate hydrolase; pantothenate amidohydrolase
Systematic name: (R)-pantothenate amidohydrolase
Links to other databases: BRENDA, EXPASY, GTD, KEGG, MetaCyc, CAS registry number: 9076-90-8
References:
1.  Nurmikko, V., Salo, E., Hakola, H., Makinen, K. and Snell, E.E. The bacterial degradation of pantothenic acid. II. Pantothenate hydrolase. Biochemistry 5 (1966) 399–402. [PMID: 5940928]
[EC 3.5.1.22 created 1972]
 
 
EC 6.3.2.1     
Accepted name: pantoate—β-alanine ligase (AMP-forming)
Reaction: ATP + (R)-pantoate + β-alanine = AMP + diphosphate + (R)-pantothenate
For diagram of coenzyme A biosynthesis (early stages), 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
References:
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. [DOI] [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 6.3.2.1 created 1961, modified 2014]
 
 
EC 6.3.2.36     
Accepted name: 4-phosphopantoate—β-alanine ligase
Reaction: ATP + (R)-4-phosphopantoate + β-alanine = AMP + diphosphate + (R)-4′-phosphopantothenate
Other name(s): phosphopantothenate synthetase; TK1686 protein
Systematic name: (R)-4-phosphopantoate:β-alanine ligase (AMP-forming)
Comments: The conversion of (R)-pantoate to (R)-4′-phosphopantothenate is part of the pathway leading to biosynthesis of 4′-phosphopantetheine, an essential cofactor of coenzyme A and acyl-carrier protein. In bacteria and eukaryotes this conversion is performed by condensation with β-alanine, followed by phosphorylation (EC 6.3.2.1 [pantoate—β-alanine ligase] and EC 2.7.1.33 [pantothenate kinase], respectively). In archaea the order of these two steps is reversed, and phosphorylation precedes condensation with β-alanine. The two archaeal enzymes that catalyse this conversion are EC 2.7.1.169, pantoate kinase, and this enzyme.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
References:
1.  Yokooji, Y., Tomita, H., Atomi, H. and Imanaka, T. Pantoate kinase and phosphopantothenate synthetase, two novel enzymes necessary for CoA biosynthesis in the Archaea. J. Biol. Chem. 284 (2009) 28137–28145. [DOI] [PMID: 19666462]
[EC 6.3.2.36 created 2011]
 
 
EC 6.3.2.44     
Accepted name: pantoate—β-alanine ligase (ADP-forming)
Reaction: ATP + (R)-pantoate + β-alanine = ADP + phosphate + (R)-pantothenate
For diagram of coenzyme A biosynthesis (early stages), 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 (ambiguous); pantoate—β-alanine ligase (ambiguous)
Systematic name: (R)-pantoate:β-alanine ligase (ADP-forming)
Comments: The enzyme, characterized from the archaeon Methanosarcina mazei, is involved in the biosynthesis of pantothenate. It is different from EC 6.3.2.1, the AMP-forming pantoate-β-alanine ligase found in bacteria and eukaryota.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
References:
1.  Ronconi, S., Jonczyk, R. and Genschel, U. A novel isoform of pantothenate synthetase in the Archaea. FEBS J. 275 (2008) 2754–2764. [DOI] [PMID: 18422645]
[EC 6.3.2.44 created 2014]
 
 


Data © 2001–2022 IUBMB
Web site © 2005–2022 Andrew McDonald