Organization and promoter analysis of the grouper (Epinephelus coioides) epinecidin-1 gene
| Autor: | I.-Hsun Ni, Jyh-Yih Chen, Jen-Leih Wu, Ching-Ming Kuo, Chia-Yu Pan |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Fish Proteins
Lipopolysaccharides Untranslated region Physiology Green Fluorescent Proteins Molecular Sequence Data Biology Transfection Biochemistry Animals Genetically Modified Exon Transcription (biology) Animals Humans Promoter Regions Genetic 3' Untranslated Regions Molecular Biology Gene Zebrafish Cells Cultured Skin Regulation of gene expression Base Sequence Ear Promoter Sequence Analysis DNA U937 Cells biology.organism_classification Immunohistochemistry Molecular biology Hepatocyte nuclear factors Poly I-C Liver Hepatocyte Nuclear Factor 1 Bass 5' Untranslated Regions Antimicrobial Cationic Peptides |
| Zdroj: | Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology. 150:358-367 |
| ISSN: | 1096-4959 |
| DOI: | 10.1016/j.cbpb.2008.04.006 |
| Popis: | Epinecidin-1, an antimicrobial peptide documented in some fish, is an essential component of the innate immune response in fish, but little is known about its gene regulation. To better understand the molecular mechanism controlling transcription of the epinecidin-1 gene, we cloned and sequenced the genes and promoter regions of three epinecidin-1 peptides from the grouper (Epinephelus coioides). These genes have the potential to encode three putative epinecidin-1 peptides with either a short or a long 5'-untranslated region (UTR). These epinecidin-1 genes, numbered 124-1 (gene structure: 5 exons), 124-2 (gene structure: 5 exons), and 961 (gene structure: 4 exons), have 3' UTR sequences that dramatically differ by being located on different exons in clones 124 and 961. To address the roles of lipopolysaccharide (LPS) and poly(I):poly(C) in regulating epinecidin-1 expression, serial deletions were prepared in the promoter region of two clones that contained three genes. Different fragments of the epinecidin-1 5'-flanking region were transfected into U937 (human histiocytic lymphoma) and ZFL (zebrafish liver) cells and then treated with 0, 1, 10, and 100 mug/mL LPS or poly(I):poly(C). The results showed that after treatment with 10 mug/mL LPS, high promoter activity was observed in the 0.6-kb promoter fragment (of clone 961). Promoter deletions showed that hepatocyte nuclear factor (HNF)-1 was required for a maximal response of epinecidin-1 961 promoter activity after LPS treatment in ZFL cells. Morphological studies of transgenic zebrafish indicated that the 2-kb epinecidin-1 124-1 promoter-driven GFP transcripts appeared in the eye and skin as confirmed by immunohistochemical staining. These results indicate that the 2-kb epinecidin-1 124-1 promoter is active in a tissue-specific manner. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect