Cloning and Characterization of a Na+-driven Anion Exchanger (NDAE1)

Cloning and Characterization of a Na+-driven Anion Exchanger (NDAE1)
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Na 驱动阴离子交换剂 (NDAE1) 的克隆和表征

DOI:
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发表时间:
2000
影响因子:
4.8
通讯作者:
Christopher M. Sciortino
Christopher M. Sciortino
中科院分区:
生物学2区
文献类型:
--
作者:
M. Romero;Darin Henry;S. Nelson;P. Harte;Alison K. Dillon;Christopher M. Sciortino

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细胞内和细胞外离子活性(如H+、Cl−、Na+)的调节是中枢神经系统、消化道、呼吸道和泌尿系统正常功能的关键。通过克隆产电Na+/HCO 3 −协同转运蛋白(NBC),我们发现NBC和阴离子交换剂形成了一个碳酸氢盐转运蛋白超家族。另外三种HCO 3 −转运蛋白是已知的:中性Na+/HCO 3 −共转运蛋白、K+/HCO 3 −共转运蛋白和Na+依赖性Cl−-HCO 3 −交换蛋白。我们报告了Na+偶联Cl−-HCO 3 −交换器和生理学上独特的碳酸氢盐转运蛋白超家族成员的克隆和表征。ThisDrosophila cDNA编码1030个氨基酸的膜蛋白,其序列同源性和预测的拓扑结构类似于阴离子交换剂和NBCs。该mRNA在果蝇的整个发育过程中都有表达,并且在中枢神经系统中非常突出。当在非洲爪蟾卵母细胞中表达时,这种膜蛋白介导Cl−、Na+、H+和HCO 3 −的转运,但不需要HCO 3 −。转运被芪4,4 ′-二异硫氰基二氢芪-2,2 ′-二磺酸盐阻断,可能不是严格的电中性。我们的功能数据表明,这种Na+驱动的阴离子交换剂(NDAE 1)负责神经元、肾脏和成纤维细胞中Na+依赖的Cl−-HCO 3 −交换活性。NDAE 1通常对果蝇发育很重要,因为该基因的破坏对果蝇幼虫显然是致命的。
Regulation of intra- and extracellular ion activities (e.g. H+, Cl−, Na+) is key to normal function of the central nervous system, digestive tract, respiratory tract, and urinary system. With our cloning of an electrogenic Na+/HCO3 − cotransporter (NBC), we found that NBC and the anion exchangers form a bicarbonate transporter superfamily. Functionally three other HCO3 −transporters are known: a neutral Na+/ HCO3 − cotransporter, a K+/ HCO3 − cotransporter, and a Na+-dependent Cl−-HCO3 − exchanger. We report the cloning and characterization of a Na+-coupled Cl−-HCO3 − exchanger and a physiologically unique bicarbonate transporter superfamily member. ThisDrosophila cDNA encodes a 1030-amino acid membrane protein with both sequence homology and predicted topology similar to the anion exchangers and NBCs. The mRNA is expressed throughoutDrosophila development and is prominent in the central nervous system. When expressed in Xenopus oocytes, this membrane protein mediates the transport of Cl−, Na+, H+, and HCO3 − but does not require HCO3 −. Transport is blocked by the stilbene 4,4′-diisothiocyanodihydrostilbene- 2,2′-disulfonates and may not be strictly electroneutral. Our functional data suggest thisNa+ driven anionexchanger (NDAE1) is responsible for the Na+-dependent Cl−-HCO3 − exchange activity characterized in neurons, kidney, and fibroblasts. NDAE1 may be generally important for fly development, because disruption of this gene is apparently lethal to the Drosophila larva.
c-H-ras 的长期表达刺激 NIH-3T3 成纤维细胞中 Na-H 和 Na(+) 依赖性 Cl-HCO3 交换。
DOI: --
发表时间: 1994
期刊: The Journal of biological chemistry
影响因子: --
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发表时间: 1984-01-01
影响因子: 2.7
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COX, KH;DELEON, DV;ANGERER, RC
通讯作者: ANGERER, RC
DOI: 10.1152/ajpcell.1994.266.5.c1357
发表时间: 1994
期刊: The American journal of physiology
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中国仓鼠肺成纤维细胞中 Na 连接和 Na 独立的 Cl-/HCO3- 交换系统的表征。
DOI: --
发表时间: 1988
期刊: The Journal of biological chemistry
影响因子: --
作者:
Cassel,D;Scharf,O;Rotman,M;CragoeJr,EJ;Katz,M
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