The Enzyme Database

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Accepted name: 3-[(3aS,4S,7aS)-7a-methyl-1,5-dioxo-octahydro-1H-inden-4-yl]propanoate—CoA ligase
Reaction: ATP + 3-[(3aS,4S,7aS)-7a-methyl-1,5-dioxo-octahydro-1H-inden-4-yl]propanoate + CoA = AMP + diphosphate + 3-[(3aS,4S,7aS)-7a-methyl-1,5-dioxo-octahydro-1H-inden-4-yl]propanoyl-CoA
For diagram of cholesterol catabolism, click here
Glossary: 3-[(3aS,4S,7aS)-7a-methyl-1,5-dioxo-octahydro-1H-inden-4-yl]propanoate = HIP
Other name(s): fadD3 (gene name); HIP—CoA ligase
Systematic name: 3-[(3aS,4S,7aS)-7a-methyl-1,5-dioxo-octahydro-1H-inden-4-yl]propanoate:CoA ligase (AMP-forming)
Comments: The enzyme, characterized from actinobacterium Mycobacterium tuberculosis, catalyses a step in the degradation of cholesterol and cholate. The enzyme is very specific for its substrate, and requires that the side chain at C17 is completely removed.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, UM-BBD
1.  Horinouchi, M., Hayashi, T., Koshino, H. and Kudo, T. ORF18-disrupted mutant of Comamonas testosteroni TA441 accumulates significant amounts of 9,17-dioxo-1,2,3,4,10,19-hexanorandrostan-5-oic acid and its derivatives after incubation with steroids. J. Steroid Biochem. Mol. Biol. 101 (2006) 78–84. [DOI] [PMID: 16891113]
2.  Casabon, I., Crowe, A.M., Liu, J. and Eltis, L.D. FadD3 is an acyl-CoA synthetase that initiates catabolism of cholesterol rings C and D in actinobacteria. Mol. Microbiol. 87 (2013) 269–283. [DOI] [PMID: 23146019]
[EC created 2014]

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