Differential transcription of two highly divergent gut-expressed Bm86 antigen gene homologues in the tick Rhipicephalus appendiculatus (Acari: Ixodida)
Loading...
Date
2011
Authors
Kamau, L. M.
Skilton, R. A.
Odongo, D.O.
Mwaura, S.
Githaka, N.
Kanduma, E.
Obura, M.
Orago, A. S.
Kabiru, Ephantus W.
Musoke, A.
Journal Title
Journal ISSN
Volume Title
Publisher
Insect Molecular Biology
Abstract
The transcriptional control of gene expression is not well documented in the Arthropoda. We describe tran-scriptional analysis of two exceptionally divergent homologues (Ra86) of the Bm86 gut antigen from Rhi-picephalus appendiculatus. Bm86 forms the basis of a commercial vaccine for the control of Rhipicephalus (Boophilus) microplus. The R. appendiculatus Ra86 proteins contain 654 and 693 amino acids, with only 80% amino acid sequence identity. Reverse-transcription PCR of gut cDNA showed transcription of only one genotype in individual female ticks. PCR amplification of 3 untranslated sequences from genomic DNA indicated that both variants could be encoded within a single genome. When both variants were present, one of the two Ra86 genotypes was transcriptionally dominant.
Description
doi: 10.1111/j.1365-2583.2010.01043.x
Keywords
Rhipicephalus appendiculatus, Tick, Vaccine, Gut antigen, Ra86, Differential transcription
Citation
Insect Molecular Biology (2011) 20 (1), 105–114