In Situ Assembly of Choline Acetyltransferase Ligands by a Hydrothiolation Reaction Reveals Key Determinants for Inhibitor Design.
Angew Chem Int Ed Engl
; 60(2): 813-819, 2021 01 11.
Article
in En
| MEDLINE
| ID: mdl-33079431
ABSTRACT
The potential drug target choline acetyltransferase (ChAT) catalyses the production of the neurotransmitter acetylcholine in cholinergic neurons, T-cells, and B-cells. Herein, we show that arylvinylpyridiniums (AVPs), the most widely studied class of ChAT inhibitors, act as substrate in an unusual coenzyme A-dependent hydrothiolation reaction. This in situ synthesis yields an adduct that is the actual enzyme inhibitor. The adduct is deeply buried in the active site tunnel of ChAT and interactions with a hydrophobic pocket near the choline binding site have major implications for the molecular recognition of inhibitors. Our findings clarify the inhibition mechanism of AVPs, establish a drug modality that exploits a target-catalysed reaction between exogenous and endogenous precursors, and provide new directions for the development of ChAT inhibitors with improved potency and bioactivity.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Choline O-Acetyltransferase
/
Enzyme Inhibitors
/
Ligands
Language:
En
Journal:
Angew Chem Int Ed Engl
Year:
2021
Document type:
Article
Affiliation country: