Enzymes
| UniProtKB help_outline | 1 proteins |
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- Name help_outline 2-hydroxyisobutanoyl-CoA Identifier CHEBI:131780 Charge -4 Formula C25H38N7O18P3S InChIKeyhelp_outline FFVUICCDNWZCRC-ZSJPKINUSA-J SMILEShelp_outline [C@@H]1(N2C3=C(C(=NC=N3)N)N=C2)O[C@H](COP(OP(OCC(C)([C@H](C(NCCC(NCCSC(=O)C(C)(C)O)=O)=O)O)C)(=O)[O-])(=O)[O-])[C@H]([C@H]1O)OP([O-])([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 3 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline acetone Identifier CHEBI:15347 (Beilstein: 635680; CAS: 67-64-1) help_outline Charge 0 Formula C3H6O InChIKeyhelp_outline CSCPPACGZOOCGX-UHFFFAOYSA-N SMILEShelp_outline CC(C)=O 2D coordinates Mol file for the small molecule Search links Involved in 15 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline formyl-CoA Identifier CHEBI:57376 Charge -4 Formula C22H32N7O17P3S InChIKeyhelp_outline SXMOKYXNAPLNCW-GORZOVPNSA-J SMILEShelp_outline [H]C(=O)SCCNC(=O)CCNC(=O)[C@H](O)C(C)(C)COP([O-])(=O)OP([O-])(=O)OC[C@H]1O[C@H]([C@H](O)[C@@H]1OP([O-])([O-])=O)n1cnc2c(N)ncnc12 2D coordinates Mol file for the small molecule Search links Involved in 12 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:69424 | RHEA:69425 | RHEA:69426 | RHEA:69427 | |
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| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
| UniProtKB help_outline |
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Publications
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Actinobacterial Degradation of 2-Hydroxyisobutyric Acid Proceeds via Acetone and Formyl-CoA by Employing a Thiamine-Dependent Lyase Reaction.
Rohwerder T., Rohde M.T., Jehmlich N., Purswani J.
The tertiary branched short-chain 2-hydroxyisobutyric acid (2-HIBA) has been associated with several metabolic diseases and lysine 2-hydroxyisobutyrylation seems to be a common eukaryotic as well as prokaryotic post-translational modification in proteins. In contrast, the underlying 2-HIBA metabol ... >> More
The tertiary branched short-chain 2-hydroxyisobutyric acid (2-HIBA) has been associated with several metabolic diseases and lysine 2-hydroxyisobutyrylation seems to be a common eukaryotic as well as prokaryotic post-translational modification in proteins. In contrast, the underlying 2-HIBA metabolism has thus far only been detected in a few microorganisms, such as the betaproteobacterium <i>Aquincola tertiaricarbonis</i> L108 and the <i>Bacillus</i> group bacterium <i>Kyrpidia tusciae</i> DSM 2912. In these strains, 2-HIBA can be specifically activated to the corresponding CoA thioester by the 2-HIBA-CoA ligase (HCL) and is then isomerized to 3-hydroxybutyryl-CoA in a reversible and B<sub>12</sub>-dependent mutase reaction. Here, we demonstrate that the actinobacterial strain <i>Actinomycetospora chiangmaiensis</i> DSM 45062 degrades 2-HIBA and also its precursor 2-methylpropane-1,2-diol via acetone and formic acid by employing a thiamine pyrophosphate-dependent lyase. The corresponding gene is located directly upstream of <i>hcl</i>, which has previously been found only in operonic association with the 2-hydroxyisobutyryl-CoA mutase genes in other bacteria. Heterologous expression of the lyase gene from DSM 45062 in <i>E. coli</i> established a 2-hydroxyisobutyryl-CoA lyase activity in the latter. In line with this, analysis of the DSM 45062 proteome reveals a strong induction of the lyase-HCL gene cluster on 2-HIBA. Acetone is likely degraded via hydroxylation to acetol catalyzed by a MimABCD-related binuclear iron monooxygenase and formic acid appears to be oxidized to CO<sub>2</sub> by selenium-dependent dehydrogenases. The presence of the lyase-HCL gene cluster in isoprene-degrading <i>Rhodococcus</i> strains and <i>Pseudonocardia</i> associated with tropical leafcutter ant species points to a role in degradation of biogenic short-chain ketones and highly branched organic compounds. << Less