Structural basis for expanded substrate specificities of human long chain acyl-CoA dehydrogenase and related acyl-CoA dehydrogenases.
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
05 06 2024
05 06 2024
Historique:
received:
23
02
2024
accepted:
23
05
2024
medline:
6
6
2024
pubmed:
6
6
2024
entrez:
5
6
2024
Statut:
epublish
Résumé
Crystal structures of human long-chain acyl-CoA dehydrogenase (LCAD) and the catalytically inactive Glu291Gln mutant, have been determined. These structures suggest that LCAD harbors functions beyond its historically defined role in mitochondrial β-oxidation of long and medium-chain fatty acids. LCAD is a homotetramer containing one FAD per 43 kDa subunit with Glu291 as the catalytic base. The substrate binding cavity of LCAD reveals key differences which makes it specific for longer and branched chain substrates. The presence of Pro132 near the start of the E helix leads to helix unwinding that, together with adjacent smaller residues, permits binding of bulky substrates such as 3α, 7α, l2α-trihydroxy-5β-cholestan-26-oyl-CoA. This structural element is also utilized by ACAD11, a eucaryotic ACAD of unknown function, as well as bacterial ACADs known to metabolize sterol substrates. Sequence comparison suggests that ACAD10, another ACAD of unknown function, may also share this substrate specificity. These results suggest that LCAD, ACAD10, ACAD11 constitute a distinct class of eucaryotic acyl CoA dehydrogenases.
Identifiants
pubmed: 38839792
doi: 10.1038/s41598-024-63027-6
pii: 10.1038/s41598-024-63027-6
doi:
Substances chimiques
Acyl-CoA Dehydrogenase, Long-Chain
EC 1.3.8.8
Acyl-CoA Dehydrogenases
EC 1.3.-
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
12976Subventions
Organisme : NIH HHS
ID : R35-ES028377
Pays : United States
Organisme : NIH HHS
ID : GM29076
Pays : United States
Informations de copyright
© 2024. The Author(s).
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