Journal Article

Insights Into the Evolution of Chemoreceptor Genes Superfamily in <i>Tyrophagus putrescentiae</i> (Acari: Acaridae)

S. X. Qu, H. P. Li, L. Ma and J. D. Song

in Journal of Medical Entomology

Published on behalf of Entomological Society of America

Volume 53, issue 4, pages 753-759
Published in print July 2016 | ISSN: 0022-2585
Published online April 2016 | e-ISSN: 1938-2928 | DOI:
Insights Into the Evolution of Chemoreceptor Genes Superfamily in Tyrophagus putrescentiae (Acari: Acaridae)

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  • Disease Ecology and Epidemiology
  • Entomology


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All living organisms, including animals, plants, fungi, and bacteria, use the olfactory system to recognize chemicals or pheromone from their environment. Insects detect a volatile substance using odorant receptors (ORs) or gustatory receptors (GRs) and ionotropic receptors (IRs). The gene families of the olfactory system in Acari are still not clear. In this study, we identified seven ORs, one GR, and five IRs from the transcriptome of the storage mite, Tyrophagus putrescentiae Schrank. No olfactory coreceptor was found in this transcriptome. Phylogenetic analysis of these gene families with other Arthropoda species revealed the conservation of carbon dioxide receptors in all tested flying insects and T. putrescentiae. Most of these ORs and GRs were unique to three mosquitoes (Anopheles gambiae Giles, Culex quinquefasciatus Say, and Aedes aegypti L.), Ixodes scapularis Say and Pediculus humanus L., indicating their involvement in specific aspects of both gustatory and olfactory perception. Some clades contained receptors obtained from all tested insect vector species, indicating a degree of conservation among some vector-dependent OR lineages. IRs family was a highly dynamic and independent original of the chemoreceptor genes subfamily. Our findings would make it possible for future research on the chemosensory recognition mechanism in Acari.

Keywords: gustatory receptor; OR; ionotropic receptor; olfactory system

Journal Article.  3459 words.  Illustrated.

Subjects: Disease Ecology and Epidemiology ; Entomology

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