Abstract:
:The primary structure of the second transmembrane (M2) segment of resistant to dieldrin (RDL), an ionotropic γ-aminobutyric acid receptor (GABAR) subunit, and the structure-function relationships in RDL are well conserved among insect species. An amino acid substitution at the 2' position in the M2 segment (Ala to Ser or Gly) confers resistance to non-competitive antagonists (NCAs) of GABARs. Here, a cDNA encoding RDL was cloned from the two-spotted spider mite Tetranychus urticae Koch. Unlike insect homologs, native TuRDL has His at the 2' position (H305) and Ile at 6' (I309) in the M2 segment and is insensitive to NCAs. Single and multiple mutations were introduced in the M2 segment of TuRDL, and the mutant proteins were expressed in Xenopus oocytes and examined for the restoration of sensitivity to NCAs. The sensitivity of a double mutant (H305A and I309T in the M2 segment) was greatly increased but was still considerably lower than that of insect RDLs. We therefore constructed chimeric RDLs consisting of TuRDL and Drosophila melanogaster RDL and examined their sensitivities to NCAs. The results show that the N-terminal region containing the Cys-loop as well as the M2 segment confers functional specificity; thus, our current understanding of the mechanism underlying NCA binding to GABARs requires reappraisal.
journal_name
J Neurochemjournal_title
Journal of neurochemistryauthors
Kobayashi T,Hiragaki S,Suzuki T,Ochiai N,Canlas LJ,Tufail M,Hayashi N,Mohamed AAM,Dekeyser MA,Matsuda K,Takeda Mdoi
10.1111/jnc.15179subject
Has Abstractpub_date
2020-12-01 00:00:00pages
508-521issue
5eissn
0022-3042issn
1471-4159journal_volume
155pub_type
杂志文章abstract::The cDNA for Tyr-Loc, a G protein-coupled receptor that clearly shows homology to a number of mammalian and fruit fly receptors for biogenic amines, was cloned from the nervous system of Locusta migratoria. Functional expression of the cloned cDNA was obtained in cultured insect cells, i.e., in Spodoptera SF9 cells us...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1046/j.1471-4159.1995.64062387.x
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journal_title:Journal of neurochemistry
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journal_title:Journal of neurochemistry
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doi:10.1111/j.1471-4159.1985.tb07148.x
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journal_title:Journal of neurochemistry
pub_type: 杂志文章
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journal_title:Journal of neurochemistry
pub_type: 杂志文章
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更新日期:1991-02-01 00:00:00
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journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1046/j.1471-4159.1999.0720196.x
更新日期:1999-01-01 00:00:00
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journal_title:Journal of neurochemistry
pub_type: 杂志文章
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更新日期:2000-02-01 00:00:00
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journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1046/j.1471-4159.1995.64062792.x
更新日期:1995-06-01 00:00:00
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journal_title:Journal of neurochemistry
pub_type: 杂志文章
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更新日期:1992-02-01 00:00:00
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journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.1982.tb07964.x
更新日期:1982-09-01 00:00:00
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journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.2009.06306.x
更新日期:2009-10-01 00:00:00
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journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.1983.tb09070.x
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journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.1984.tb02802.x
更新日期:1984-05-01 00:00:00
abstract::Perinatal hypoxic-ischaemic encephalopathy (HIE) occurs in 1-2 in every 1000 term infants and the devastating consequences range from cerebral palsy, epilepsy and neurological deficit to death. Cellular damage post insult occurs after a delay and is mediated by a secondary neural energy failure. AMP-activated protein ...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/jnc.13034
更新日期:2015-04-01 00:00:00
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journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1046/j.1471-4159.2003.02262.x
更新日期:2004-03-01 00:00:00
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journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.1985.tb04007.x
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pub_type: 杂志文章
doi:10.1111/j.1471-4159.1986.tb02852.x
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journal_title:Journal of neurochemistry
pub_type: 杂志文章
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journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.1985.tb05440.x
更新日期:1985-02-01 00:00:00
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journal_title:Journal of neurochemistry
pub_type: 杂志文章,评审
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更新日期:2016-10-01 00:00:00
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journal_title:Journal of neurochemistry
pub_type: 杂志文章
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更新日期:1997-10-01 00:00:00
abstract::The neurotoxin 1-methyl-4-phenylpyridinium ion (MPP+) in the brain striatum has recently been shown to bind at a putatively vesicular site labeled by [3H]tyramine ([3H]TY). Whereas in the rat and mouse striatum MPP+ antagonized TY binding competitively, in the cerebellum there was a mixed-type antagonism, which sugges...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.1993.tb03212.x
更新日期:1993-02-01 00:00:00
abstract::Hyperglycemia is known to induce microvascular complications, thereby altering blood-brain barrier (BBB) permeability. This study investigated the role of matrix metalloproteinases (MMPs) and their endogenous inhibitors in increased BBB permeability and evaluated the protective effect of S-nitrosoglutathione (GSNO) in...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/jnc.12939
更新日期:2015-03-01 00:00:00
abstract::Agonist-induced down-regulation of opioid receptors appears to require the phosphorylation of the receptor protein. However, the identities of the specific protein kinases that perform this task remain uncertain. Protein kinase C (PKC) has been shown to catalyze the phosphorylation of several G protein-coupled recepto...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1046/j.1471-4159.1999.0720585.x
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abstract::Microvessels were isolated from canine cerebral cortex, and the composition of the endothelial cell membrane was investigated. Endothelial cell membranes were separated from the surrounding basement membrane, solubilized, and subjected to sodium dodecyl sulfate-polyacrylamide gel electrophoresis in 12% gels. Staining ...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.1983.tb00831.x
更新日期:1983-11-01 00:00:00
abstract::Beta-amyloid peptides (A beta) are deposited in an aggregated fibrillar form in both diffuse and senile plaques in the brains of patients with Alzheimer's disease. The neurotoxicity of A beta in cultured neurons is dependent on its aggregation state, but the factors contributing to aggregation and fibril formation are...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1046/j.1471-4159.1998.70031182.x
更新日期:1998-03-01 00:00:00
abstract::Synaptosomes, isolated from the whole brain of young (3 months) and old (24 months) rats were used to study the major bioenergetic systems of neuronal mitochondria in situ, within the synaptosome. Approximately 85% of the resting oxygen consumption of synaptosomes from both young and old rats was a result of proton le...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1046/j.1471-4159.2003.01915.x
更新日期:2003-08-01 00:00:00
abstract::In developing CNS D1 dopamine receptor-imaging agents with improved specificity and longer brain retention, an iodinated D1 ligand was synthesized. In vitro and in vivo radiolabeling studies of a new iodinated benzazepine, TISCH [7-chloro-8-hydroxy-1-(3'-iodophenyl)-3-methyl-2,3,4,5-tetrahydro-1H-3- benzazepine], an a...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.1992.tb09300.x
更新日期:1992-01-01 00:00:00