Cloning and characterization of AgCA9, a novel α-carbonic anhydrase from Anopheles gambiae Giles sensu stricto (Diptera: Culicidae) larvae

Cloning and characterization of AgCA9, a novel α-carbonic anhydrase from Anopheles gambiae Giles sensu stricto (Diptera: Culicidae) larvae
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AgCA9(一种来自冈比亚按蚊(双翅目:蚊科)幼虫的新型 α-碳酸酐酶)的克隆和表征

DOI:
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发表时间:
2007
影响因子:
2.8
通讯作者:
P. Linser
P. Linser
中科院分区:
生物学2区
文献类型:
--
作者:
Kristin E. Smith;L. Vanekeris;P. Linser

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摘要 蚊子幼虫在中肠前部区域产生高达 10.5 的管腔 pH 值。产生和维持这种碱性 pH 值的机制在很大程度上尚不清楚,但有证据表明碳酸酐酶 (CA) 的作用。 CA 是从冈比亚按蚊幼虫的消化道上皮中克隆出来的,可以产生碳酸氢盐,作为幼虫管腔的缓冲剂。问题仍然是碳酸氢盐如何从细胞转运到管腔中。我们假设腔内本身存在 CA,可利用代谢活跃的消化道细胞产生的 CO2 生成碳酸氢盐。在这里,我们报告了来自 An 幼虫的新型细胞质型 α-CA 的克隆和表征。冈比亚消化道。抗体免疫定位揭示了独特的蛋白质分布模式,包括外周营养液、消化道“过渡区”、马氏小管和直肠背前区的细胞亚群。这种 CA 在消化道管腔内的定位可能是幼虫 pH 调节的关键,而直肠内的检测揭示了 An 中的一个新的细胞亚群。冈比亚 迄今为止尚未有描述。来自智人、果蝇、埃及伊蚊和按蚊的α-CA家族成员的系统发育分析。冈比亚基因组显示新的 CA 与智人 CA 聚类,但不与其他昆虫 CA 聚类。最后,为新克隆的 An 命名的通用系统。建议使用冈比亚 CA。
SUMMARY Mosquito larvae generate a luminal pH as high as 10.5 in the anterior region of their midgut. The mechanisms responsible for the generation and maintenance of this alkaline pH are largely unknown, but there is evidence suggesting a role for the enzyme carbonic anhydrase (CA). CA has been cloned from the alimentary canal epithelium of Anopheles gambiae larvae and can generate bicarbonate, which is implicated as a buffer for the larval lumen. The question remains as to how the bicarbonate is transported from the cells into the lumen. We hypothesize the presence of a CA within the lumen itself to generate bicarbonate from CO2 produced by the metabolically active alimentary canal cells. Here, we report the cloning and characterization of a novel cytoplasmic-type α-CA from the larval An. gambiae alimentary canal. Antibody immunolocalization reveals a unique protein distribution pattern that includes the ectoperitrophic fluid, `transitional region' of the alimentary canal, Malpighian tubules and a subset of cells in the dorsal anterior region of the rectum. Localization of this CA within the lumen of the alimentary canal may be a key to larval pH regulation, while detection within the rectum reveals a novel subset of cells in An. gambiae not described to date. Phylogenetic analysis of members of theα -CA family from the Homo sapiens, Drosophila melanogaster, Aedes aegypti and An. gambiae genomes shows a clustering of the novel CA with Homo sapiens CAs but not with other insect CAs. Finally, a universal system for naming newly cloned An. gambiae CAs is suggested.
DOI: 10.1177/1526602814565776
发表时间: 2015-02-01
影响因子: 2.6
作者:
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鳞翅目幼虫中肠外周营养区的 pH 值较高。
DOI: 10.1242/jeb.183.1.353
发表时间: 1993
期刊: The Journal of experimental biology
影响因子: --
作者:
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期刊: The Journal of experimental biology
影响因子: --
作者:
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DOI: 10.1242/jeb.205.5.591
发表时间: 2002
期刊: The Journal of experimental biology
影响因子: --
作者:
Corena,MariaPilar;Seron,TheresaJ;Lehman,HermK;Ochrietor,JudithD;Kohn,Andrea;Tu,Chingkuang;Linser,PaulJ
通讯作者: Linser,PaulJ
DOI: 10.1006/mpev.1996.0006
发表时间: 1996-02-01
影响因子: 4.1
作者:
HewettEmmett, D;Tashian, RE
通讯作者: Tashian, RE