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5-羟色胺抑制P2X2受体通道孔突变体。

5-Hydroxytryptamine inhibits P2X2 receptor channel pore mutants.

作者信息

Nakazawa K, Ohno Y

机构信息

Division of Pharmacology, National Institute of Health Sciences, Tokyo, Japan.

出版信息

Cell Mol Neurobiol. 1999 Oct;19(5):665-9. doi: 10.1023/a:1006940720038.

DOI:10.1023/a:1006940720038
PMID:10384263
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11545403/
Abstract
  1. 5-Hydroxytryptamine (10 microM) enhanced ionic current mediated through the wild-type P2X2 receptor/channel expressed in Xenopus oocytes. 2. 5-Hydroxytryptamine (10 microM) inhibited a current mediated through P2X2 receptor/channel mutants when Thr330 or Asn333 was replaced with Ile (T330I and N333I). 3. Our results suggest that neutralization of Thr330 or Asn333 exposes a high-affinity, inhibitory binding site for 5-hydroxytryptamine. This implies that 5-hydroxytryptamine interacts with the P2X2 receptor/channel at their channel pores.
摘要
  1. 5-羟色胺(10微摩尔)增强了通过非洲爪蟾卵母细胞中表达的野生型P2X2受体/通道介导的离子电流。2. 当苏氨酸330或天冬酰胺333被异亮氨酸取代(T330I和N333I)时,5-羟色胺(10微摩尔)抑制了通过P2X2受体/通道突变体介导的电流。3. 我们的结果表明,苏氨酸330或天冬酰胺333的中和暴露了一个对5-羟色胺具有高亲和力的抑制性结合位点。这意味着5-羟色胺在其通道孔处与P2X2受体/通道相互作用。

相似文献

1
5-Hydroxytryptamine inhibits P2X2 receptor channel pore mutants.5-羟色胺抑制P2X2受体通道孔突变体。
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2
Block and unblock by imipramine of cloned and mutated P2X2 receptor/channel expressed in Xenopus oocytes.丙咪嗪对非洲爪蟾卵母细胞中表达的克隆及突变型P2X2受体/通道的阻断与解除阻断作用
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An asparagine residue regulating conductance through P2X2 receptor/channels.一个通过P2X2受体/通道调节电导的天冬酰胺残基。
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本文引用的文献

1
An asparagine residue regulating conductance through P2X2 receptor/channels.一个通过P2X2受体/通道调节电导的天冬酰胺残基。
Eur J Pharmacol. 1998 Apr 17;347(1):141-4. doi: 10.1016/s0014-2999(98)00207-6.
2
Membrane topology of an ATP-gated ion channel (P2X receptor).一种ATP门控离子通道(P2X受体)的膜拓扑结构。
J Biol Chem. 1998 Jun 12;273(24):15177-82. doi: 10.1074/jbc.273.24.15177.
3
P2X1 and P2X3 receptors form stable trimers: a novel structural motif of ligand-gated ion channels.P2X1和P2X3受体形成稳定的三聚体:配体门控离子通道的一种新型结构基序。
EMBO J. 1998 Jun 1;17(11):3016-28. doi: 10.1093/emboj/17.11.3016.
4
Topological analysis of the ATP-gated ionotropic [correction of ionotrophic] P2X2 receptor subunit.ATP门控离子型[离子营养型的校正]P2X2受体亚基的拓扑分析。
FEBS Lett. 1998 Mar 20;425(1):19-23. doi: 10.1016/s0014-5793(98)00179-3.
5
An aspartic acid residue near the second transmembrane segment of ATP receptor/channel regulates agonist sensitivity.ATP受体/通道第二个跨膜片段附近的一个天冬氨酸残基调节激动剂敏感性。
Biochem Biophys Res Commun. 1998 Mar 17;244(2):599-603. doi: 10.1006/bbrc.1998.8312.
6
A domain contributing to the ion channel of ATP-gated P2X2 receptors identified by the substituted cysteine accessibility method.通过半胱氨酸替代可及性方法鉴定的对ATP门控P2X2受体离子通道有贡献的结构域。
J Neurosci. 1998 Apr 1;18(7):2350-9. doi: 10.1523/JNEUROSCI.18-07-02350.1998.
7
Ivermectin: a positive allosteric effector of the alpha7 neuronal nicotinic acetylcholine receptor.伊维菌素:α7神经元烟碱型乙酰胆碱受体的正变构效应剂。
Mol Pharmacol. 1998 Feb;53(2):283-94. doi: 10.1124/mol.53.2.283.
8
Identification of amino acid residues contributing to the pore of a P2X receptor.对构成P2X受体孔道的氨基酸残基的鉴定。
EMBO J. 1997 Jun 16;16(12):3446-54. doi: 10.1093/emboj/16.12.3446.
9
Effects of neuroamines and divalent cations on cloned and mutated ATP-gated channels.神经胺和二价阳离子对克隆及突变的ATP门控通道的影响。
Eur J Pharmacol. 1997 Apr 23;325(1):101-8. doi: 10.1016/s0014-2999(97)00107-6.
10
Threonine-for-leucine mutation within domain M2 of the neuronal alpha(7) nicotinic receptor converts 5-hydroxytryptamine from antagonist to agonist.神经元α(7)烟碱型受体M2结构域内苏氨酸替换亮氨酸的突变可使5-羟色胺由拮抗剂转变为激动剂。
Proc Natl Acad Sci U S A. 1996 Oct 1;93(20):11231-5. doi: 10.1073/pnas.93.20.11231.