Molecular analysis of the Aedes aegypti carboxypeptidase gene family.

Abstract:

:To gain a better understanding of coordinate regulation of protease gene expression in the mosquito midgut, we undertook a comprehensive molecular study of digestive carboxypeptidases in Aedes aegypti. Through a combination of cDNA cloning using degenerate PCR primers, and database mining of the recently completed A. aegypti genome, we cloned and characterized 18 A. aegypti carboxypeptidase genes. Bioinformatic analysis revealed that 11 of these genes belong to the carboxypeptidase A family (AaCPA-I through AaCPA-XI), and seven to the carboxypeptidase B gene family (AaCPB-I through AaCPB-VII). Phylogenetic analysis of 32 mosquito carboxypeptidases from five different species indicated that most of the sequence divergence in the carboxypeptidase gene family occurred prior to the separation of Aedes and Anopheles mosquito lineages. Unlike the CPA genes that are scattered throughout the A. aegypti genome, six of seven CPB genes were found to be located within a single 120 kb genome contig, suggesting that they most likely arose from multiple gene duplication events. Quantitative expression analysis revealed that 11 of the A. aegypti carboxypeptidase genes were induced up to 40-fold in the midgut in response to blood meal feeding, with peak expression times ranging from 3 to 36 h post-feeding depending on the gene.

authors

Isoe J,Zamora J,Miesfeld RL

doi

10.1016/j.ibmb.2008.09.006

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

68-73

issue

1

eissn

0965-1748

issn

1879-0240

pii

S0965-1748(08)00168-9

journal_volume

39

pub_type

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