Abstract:
:Fluorescein 5'-isothiocyanate (FITC) was used to modify lysine residues of the strychnine-sensitive glycine receptor. Pretreatment of rat spinal cord synaptic plasma membranes with FITC specifically affected the ability of glycine to displace [3H]strychnine binding. Glycine completely prevented the effect of FITC modification, suggesting the existence of lysine group(s) either at or in the vicinity of the agonist binding site. Labeling of purified glycine receptor with FITC indicates that such lysine residue(s) are located in the 48,000 daltons polypeptide. Chemical cleavage of the FITC-labeled 48-kilodalton subunit with N-chlorosuccinimide reveals two major labeled fragments of Mr 13.9 kilodalton and 8.5-kilodalton, respectively, the labeling of each being protected by glycine.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Ruiz Gómez A,Fernández-Shaw C,Valdivieso F,Mayor F Jrdoi
10.1016/0006-291x(89)91666-5subject
Has Abstractpub_date
1989-04-14 00:00:00pages
374-81issue
1eissn
0006-291Xissn
1090-2104pii
0006-291X(89)91666-5journal_volume
160pub_type
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