| EC |
4.2.1.116 |
| Accepted name: |
3-hydroxypropionyl-CoA dehydratase |
| Reaction: |
3-hydroxypropanoyl-CoA = acryloyl-CoA + H2O |
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For diagram of the 3-hydroxypropanoate cycle, click here and for diagram of the 3-hydroxypropanoate/4-hydroxybutanoate cycle and dicarboxylate/4-hydroxybutanoate cycle in archaea, click here |
| Glossary: |
acryloyl-CoA = acrylyl-CoA
3-hydroxypropanoyl-CoA = 3-hydroxypropionyl-CoA |
| Other name(s): |
3-hydroxypropionyl-CoA hydro-lyase; 3-hydroxypropanoyl-CoA dehydratase |
| Systematic name: |
3-hydroxypropanoyl-CoA hydro-lyase |
| Comments: |
Catalyses a step in the 3-hydroxypropanoate/4-hydroxybutanoate cycle, an autotrophic CO2 fixation pathway found in some thermoacidophilic archaea [1]. The enzyme from Metallosphaera sedula acts nearly equally as well on (S)-3-hydroxybutanoyl-CoA but not (R)-3-hydroxybutanoyl-CoA [2]. |
| Links to other databases: |
BRENDA, EXPASY, KEGG, MetaCyc, PDB |
| References: |
| 1. |
Berg, I.A., Kockelkorn, D., Buckel, W. and Fuchs, G. A 3-hydroxypropionate/4-hydroxybutyrate autotrophic carbon dioxide assimilation pathway in Archaea. Science 318 (2007) 1782–1786. [DOI] [PMID: 18079405] |
| 2. |
Teufel, R., Kung, J.W., Kockelkorn, D., Alber, B.E. and Fuchs, G. 3-hydroxypropionyl-coenzyme A dehydratase and acryloyl-coenzyme A reductase, enzymes of the autotrophic 3-hydroxypropionate/4-hydroxybutyrate cycle in the Sulfolobales. J. Bacteriol. 191 (2009) 4572–4581. [DOI] [PMID: 19429610] |
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| [EC 4.2.1.116 created 2009] |
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| EC |
6.2.1.36 |
| Accepted name: |
3-hydroxypropionyl-CoA synthase |
| Reaction: |
3-hydroxypropanoate + ATP + CoA = 3-hydroxypropanoyl-CoA + AMP + diphosphate |
|
For diagram of the 3-hydroxypropanoate cycle, click here and for diagram of the 3-hydroxypropanoate/4-hydroxybutanoate cycle and dicarboxylate/4-hydroxybutanoate cycle in archaea, click here |
| Glossary: |
3-hydroxypropionyl-CoA = 3-hydroxypropanoyl-CoA |
| Other name(s): |
3-hydroxypropionyl-CoA synthetase (AMP-forming); 3-hydroxypropionate—CoA ligase |
| Systematic name: |
hydroxypropanoate:CoA ligase (AMP-forming) |
| Comments: |
Catalyses a step in the 3-hydroxypropanoate/4-hydroxybutanoate cycle, an autotrophic CO2 fixation pathway found in some thermoacidophilic archaea [1,2].The enzymes from Metallosphaera sedula and Sulfolobus tokodaii can also use propionate, acrylate, acetate, and butanoate as substrates [2], and are thus different from EC 6.2.1.17 (propionate—CoA ligase), which does not accept acetate or butanoate. |
| Links to other databases: |
BRENDA, EXPASY, KEGG, MetaCyc |
| References: |
| 1. |
Berg, I.A., Kockelkorn, D., Buckel, W. and Fuchs, G. A 3-hydroxypropionate/4-hydroxybutyrate autotrophic carbon dioxide assimilation pathway in Archaea. Science 318 (2007) 1782–1786. [DOI] [PMID: 18079405] |
| 2. |
Alber, B.E., Kung, J.W. and Fuchs, G. 3-Hydroxypropionyl-coenzyme A synthetase from Metallosphaera sedula, an enzyme involved in autotrophic CO2 fixation. J. Bacteriol. 190 (2008) 1383–1389. [DOI] [PMID: 18165310] |
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| [EC 6.2.1.36 created 2009] |
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