Affinity-dependent cross-linking to neurotoxin sites of the acetylcholine receptor mediated by catechol oxidation.
Affinity-dependent cross-linking to neurotoxin sites of the acetylcholine receptor mediated by catechol oxidation.
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由儿茶酚氧化介导的与乙酰胆碱受体神经毒素位点的亲和力依赖性交联。
DOI:
10.1021/bi00325a029
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发表时间:
1985
期刊:
影响因子:
2.9
通讯作者:
R. A. Hudson
中科院分区:
文献类型:
--
作者:
B. Nickoloff;M. Grimes;E. Wohlfeil;R. A. Hudson
The choline homologue 3-[(trimethylammonio)methyl]catechol (TMC) has been synthesized, and the controllable features of its complex oxidation have been examined spectroscopically and correlated with its toxin binding inactivating reactions with the acetylcholine receptor (AcChR) from Torpedo californica electroplax. Affinity-dependent reactions of early intermediates in the oxidation of TMC are suggested to intercede covalently in this inactivation. At pH 7.4, where the oxidative polymerization of catechols proceeds spontaneously, pyrocatechol produced no effect on the toxin binding function of AcChR, whereas comparable concentrations of TMC led to inactivation of half of all available sites. Lower concentrations of TMC converted via oxidation with ceric salts to an in situ mixture of monohydroxylated catechols were shown to be effective in short-term incubations in inactivating approximately half of the toxin binding sites by covalent labeling of the receptor. Mixtures of dihydroxycatechol intermediates, hydroxy-p-quinones, and polymeric products led to nonspecific toxin binding site inactivation of AcChR in excess of half of all available sites. Collectively, the results suggest that both covalent labeling and oxygen reduction product inactivating mechanisms are operative in these model macromolecular site reactions and that catechol-containing affinity reagents may be useful in elucidating the molecular features of sites to which they are directed.
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DOI:
--
发表时间:
1982
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Augusto,O;Beilan,HS;OrtizdeMontellano,PR
通讯作者:
OrtizdeMontellano,PR
DOI:
10.1111/1523-1747.ep12531751
发表时间:
1983
期刊:
The Journal of investigative dermatology
影响因子:
--
作者:
FitzGerald,GB;Wick,MM
通讯作者:
Wick,MM
影响因子:
4.1
作者:
DEMONTELLANO, PRO;MATHEWS, JM
通讯作者:
MATHEWS, JM
DOI:
--
发表时间:
1981
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Correia,MA;Farrell,GC;Olson,S;Wong,JS;Schmid,R;OrtizdeMontellano,PR;Beilan,HS;Kunze,KL;Mico,BA
通讯作者:
Mico,BA
影响因子:
2.9
作者:
OrtizdeMontellano,PR;Kunze,KL
通讯作者:
Kunze,KL