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
中科院分区:
文献类型:
--
作者:
Kristin E. Smith;L. Vanekeris;P. Linser
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.
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影响因子:
2.6
作者:
Tse, Leonard W.;Lindsay, Thomas F.;Tan, Kong Teng
通讯作者:
Tan, Kong Teng
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:
Gringorten,JL;Crawford,DN;Harvey,WR
通讯作者:
Harvey,WR
DOI:
10.1242/jeb.196.1.361
发表时间:
1994
期刊:
The Journal of experimental biology
影响因子:
--
作者:
Lepier,A;Azuma,M;Harvey,WR;Wieczorek,H
通讯作者:
Wieczorek,H
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
影响因子:
4.1
作者:
HewettEmmett, D;Tashian, RE
通讯作者:
Tashian, RE