CYCLIC NUCLEOTIDE-ACTIVATED CHANNELS IN THE FROG OLFACTORY RECEPTOR PLASMA-MEMBRANE

被引:57
作者
KOLESNIKOV, SS
ZHAINAZAROV, AB
KOSOLAPOV, AV
机构
[1] Institute of Biological Physics, USSR Academy of Sciences, Pushchino
关键词
Cyclic nucleotide-activated channel; Olfactory receptor cell; Single channel recording;
D O I
10.1016/0014-5793(90)81515-P
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Patch clamp technique was used to record cyclic nucleotide-dependent current of the frog olfactory receptor cell plasma membrane. Data obtained indicate that the channels passing this current are permeable to Ca2+ or Mg2+ and moderately selective for monovalent cations according to the sequence Li+, Na+, K+ > Rb+ > Cs+ and are effectively blocked by 1-cis-diltiazem and 3′,4′-dichlorobenzamil. The conductance of single cyclic nucleotide-gated channels in solutions with low Ca2+ and Mg2+ content is about 19 pS. The results demonstrate that cyclic nucleotide-activated channels of olfactory receptor cells are virtually identical to photoreceptor ones. © 1990.
引用
收藏
页码:96 / 98
页数:3
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