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Design and Synthesis of Photoaffinity Probe Candidates for the GABA‐gated Chloride Channel
Author(s) -
Liu ShangZhong,
Li QingX.
Publication year - 2006
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200690269
Subject(s) - chemistry , chloride channel , chloride , photoaffinity labeling , potency , stereochemistry , channel blocker , binding site , biochemistry , in vitro , organic chemistry , calcium
In order to characterize binding sites of insecticidal compounds on GABA gated chloride channel, new photoaffinity probe candidates based on 5e‐ t ‐butyl‐2e‐[4‐(substituted‐propynyl)phenyl]‐1,3‐dithiane for the noncompetitive blocker (NCB) site of the γ ‐aminobutyric acid (GABA)‐gated chloride channel were designed and synthesized, and their potency as an inhibitor on NCB was measured by 4′‐ethynyl‐4‐ n ‐[2,3‐ 3 H 2 ]‐propylbicycloorthobenzoate ( 3 H EBOB) assay. The synthesized compounds showed high inhibition activities with half maximum inhibition concentrations (IC 50 ) of lower than 35 nmol/L and were very stable in binding conditions as well photoreacted quickly at 300 nm light. These new compounds are expected to be good photoaffinity labeling probes if radioisotope iodine is incorporated.