Metabolic Fate of Human Immunoactive Sterols in Mycobacterium tuberculosis.
3-Hydroxysteroid Dehydrogenases
/ chemistry
Catalysis
Cytochrome P-450 Enzyme System
/ chemistry
Energy Metabolism
Enzyme Activation
Host-Pathogen Interactions
/ immunology
Humans
Immunity
Isoenzymes
Models, Molecular
Mycobacterium tuberculosis
/ immunology
Oxysterols
/ chemistry
Recombinant Proteins
Structure-Activity Relationship
Tuberculosis
/ immunology
25-hydroxy-cholesterol
CYP crystal structure
Mycobacterium tuberculosis
host-pathogen interactions
immunity
Journal
Journal of molecular biology
ISSN: 1089-8638
Titre abrégé: J Mol Biol
Pays: Netherlands
ID NLM: 2985088R
Informations de publication
Date de publication:
19 02 2021
19 02 2021
Historique:
received:
15
08
2020
revised:
05
12
2020
accepted:
12
12
2020
pubmed:
29
12
2020
medline:
24
4
2021
entrez:
28
12
2020
Statut:
ppublish
Résumé
Mycobacterium tuberculosis (Mtb) infection is among top ten causes of death worldwide, and the number of drug-resistant strains is increasing. The direct interception of human immune signaling molecules by Mtb remains elusive, limiting drug discovery. Oxysterols and secosteroids regulate both innate and adaptive immune responses. Here we report a functional, structural, and bioinformatics study of Mtb enzymes initiating cholesterol catabolism and demonstrated their interrelation with human immunity. We show that these enzymes metabolize human immune oxysterol messengers. Rv2266 - the most potent among them - can also metabolize vitamin D3 (VD3) derivatives. High-resolution structures show common patterns of sterols binding and reveal a site for oxidative attack during catalysis. Finally, we designed a compound that binds and inhibits three studied proteins. The compound shows activity against Mtb H37Rv residing in macrophages. Our findings contribute to molecular understanding of suppression of immunity and suggest that Mtb has its own transformation system resembling the human phase I drug-metabolizing system.
Identifiants
pubmed: 33359098
pii: S0022-2836(20)30688-4
doi: 10.1016/j.jmb.2020.166763
pii:
doi:
Substances chimiques
Isoenzymes
0
Oxysterols
0
Recombinant Proteins
0
Cytochrome P-450 Enzyme System
9035-51-2
3-Hydroxysteroid Dehydrogenases
EC 1.1.-
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
166763Informations de copyright
Copyright © 2020 Elsevier Ltd. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of Interests A.Gi. and E.S. are employees of MT-Medicals LLC. The other authors declare no competing interests.