title: Isolation and characterization of three diapause-associated transcripts from the Colorado potato beetle, Leptinotarsa decemlineata.
abstract: Using suppressive subtractive hybridization, fragments of three diapause-associated transcripts (DAT-1, 2 and 3) were isolated from the Colorado potato beetle, Leptinotarsa decemlineata. Full-length clones were developed for the transcripts. DAT-1 encodes a deduced protein 286 amino acids in length with limited identity to several proteins with leucine-rich domains. DAT-2 encodes a deduced protein 229 amino acids in length with 27% identity, 40% similarity to the desiccation stress protein from Tenebrio molitor. DAT-3 encodes a deduced protein 97 amino acids in length with identity to no known protein. DAT-1 and 2 have similar expression patterns as determined by northern blot analysis. Trace levels of these two transcripts are first detected in 3-day-old diapause-programmed adults with a significant increase in expression on day 6. Expression of DAT-3 begins on day 12 in diapause-programmed adults and expression levels increase until the beetles enter diapause. Expression of DAT-1, 2 and 3 continues at least 60 days into diapause.
authors.affiliation: Red River Valley Agricultural Research Center, USDA-ARS, Biosciences Research Laboratory, 1605 Albrecht Boulevard, Fargo, ND 58105-5674, USA. yocumg@fargo.ars.usda.gov
authors.forename: G D
authors.initials: GD
authors.lastname: Yocum
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D015152:Blotting, Northern; D001517:Coleoptera / Q000378:metabolism* / Q000502:physiology; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D012333:RNA, Messenger / Q000235:genetics* / Q000378:metabolism
chemical_list: D012333:RNA, Messenger