| RRC ID |
486
|
| 著者 |
Volkoff AN, Rocher J, d'Alençon E, Bouton M, Landais I, Quesada-Moraga E, Vey A, Fournier P, Mita K, Devauchelle G.
|
| タイトル |
Characterization and transcriptional profiles of three Spodoptera frugiperda genes encoding cysteine-rich peptides. A new class of defensin-like genes from lepidopteran insects?
|
| ジャーナル |
Gene
|
| Abstract |
The present work describes sequence and transcription of three Spodoptera frugiperda genes encoding 6-cysteine-rich peptides. Sequence alignments indicate that the predicted peptides belong to the insect defensin family, although phylogenetic analyses suggest they form a cluster distinct from that of other neopteran insect defensins. The three genes were identified in a non-immune-challenged Sf9 cells cDNA (DNA complementary to RNA) library (Landais et al., Bioinformatics, in press) and were named spodoptericin, Sf-gallerimycin and Sf-cobatoxin. Spodoptericin is a novel defensin-like gene that appears to be weakly up-regulated following injection of bacteria and fungi. Interestingly, no sequence motif clearly homologous to cis regulatory element involved in the regulation of antimicrobial genes was found. An homologue of the spodoptericin gene was identified in the SilkBase Bombyx mori cDNA library. Sf-gallerimycin is related to the Galleria mellonella gallerimycin gene and is induced after immune challenge by injection of bacteria in the larval fat body as well as in hemocytes. In silico analysis of the sequence upstream from the cDNA reveals the presence of at least one motif homologous to a nuclear factor kappaB (NF-kappaB) binding site. Finally, Sf-cobatoxin is related to the G. mellonella cobatoxin-like gene. Despite high levels of constitutive expression compared to the two previous genes, transcription of Sf-cobatoxin is increased after immune, in particular, bacterial challenge. We therefore confirm that these three genes encode potential candidate molecules involved in S. frugiperda innate humoral response.
|
| 巻・号 |
319
|
| ページ |
43-53
|
| 公開日 |
2003-11-13
|
| DOI |
10.1016/s0378-1119(03)00789-3
|
| PII |
S0378111903007893
|
| PMID |
14597170
|
| MeSH |
Amino Acid Sequence
Animals
Antimicrobial Cationic Peptides / genetics
Base Sequence
Cell Line
DNA / chemistry
DNA / genetics
DNA, Complementary / genetics
DNA, Complementary / isolation & purification
Defensins / genetics
Fat Body / cytology
Fat Body / metabolism
Gene Dosage
Gene Expression Regulation
Genes, Insect / genetics
Hemocytes / metabolism
Insect Proteins / genetics*
Molecular Sequence Data
Phylogeny
Promoter Regions, Genetic / genetics
Sequence Alignment
Sequence Analysis, DNA
Sequence Homology, Amino Acid
Spodoptera / cytology
Spodoptera / genetics*
Spodoptera / microbiology
Transcription, Genetic
Up-Regulation
|
| IF |
2.984
|
| 引用数 |
48
|
|
WOS 分野
|
GENETICS & HEREDITY
|
| リソース情報 |
| カイコ |
Silkbase |
