Protein tyrosine phosphatase 1B inhibitors from the fungus Malbranchea albolutea.
Phytochemistry
; 184: 112664, 2021 Apr.
Article
em En
| MEDLINE
| ID: mdl-33524855
ABSTRACT
From solid rice-based cultures of Malbranchea albolutea, three undescribed ardeemins and sartoryglabrins analogs were discovered and named alboluteins A-C. 1H-Indole-3-carbaldehyde, and anthranilic acid were also isolated. 1D and 2D-NMR techniques, as well as DFT-calculated chemical shifts, allowed characterizing alboluteins A-C. Testing these compounds against PTP1B indicated their inhibitory activity with IC50's ranging from 19 to 129 µM (ursolic acid IC50 = 29.8 µM, positive control). Kinetic analysis revealed that albolutein C behaved as a non-competitive inhibitor. Docking studies of alboluteins A-C into the crystal structure of PTP1B (PDB ID 1T49) predicted that all compounds prefer to bind at the allosteric site of the enzyme, with Ki values of 2.02 × 10-4, 1.31 × 10-4, and 2.67 × 10-4 mM, respectively. Molecular dynamic studies indicated that the active compounds remained tied to the enzyme with good binding energy.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Inibidores Enzimáticos
/
Proteína Tirosina Fosfatase não Receptora Tipo 1
Idioma:
En
Revista:
Phytochemistry
Ano de publicação:
2021
Tipo de documento:
Article