Molecular characterization of DSC1 orthologs in invertebrate species.

Journal Article (Journal Article)

DSC1 and BSC1 are two founding members of a novel family of invertebrate voltage-gated cation channels with close structural and evolutionary relationships to voltage-gated sodium and calcium channels. In this study, we searched the published genome sequences for DSC1 orthologs. DSC1 orthologs were found in all 48 insect species, and in other invertebrate species belonging to phyla Mollusca, Cnidaria, Hemichordata and Echinodermata. However, DSC1 orthologs were not found in four arachnid species, Ixodes scapularis, Rhipicephalus microplus, Tetranychus urticae and Varroa destructor, two species in Annelida or any vertebrate species. We then cloned and sequenced NlSC1 and BmSC1 full-length cDNAs from the brown planthopper (Nilaparvata lugens) and the silkworm (Bombyx mori), respectively. NlSC1 and BmSC1 share about 50% identity with DSC1, and the expression of NlSC1 and BmSC1 transcripts was most abundant in the head and antenna in adults. All DSC1 orthologs contain a unique and conserved DEEA motif, instead of the EEEE or EEDD motif in classical calcium channels or the DEKA motif in sodium channels. Phylogenetic analyses revealed that DSC1 and its orthologs form a separate group distinct from the classical voltage-gated sodium and calcium channels and constitute a unique family of cation channels. The DSC1/BSC1-family channels could be potential targets of new and safe insecticides for pest control.

Full Text

Duke Authors

Cited Authors

  • Cui, Y-J; Yu, L-L; Xu, H-J; Dong, K; Zhang, C-X

Published Date

  • May 2012

Published In

Volume / Issue

  • 42 / 5

Start / End Page

  • 353 - 359

PubMed ID

  • 22321571

Electronic International Standard Serial Number (EISSN)

  • 1879-0240

International Standard Serial Number (ISSN)

  • 0965-1748

Digital Object Identifier (DOI)

  • 10.1016/j.ibmb.2012.01.005


  • eng