Biomaterial Database

Overlapping antiparallel transcripts induced by ecdysone in a Drosophila cell line. 1999

J Rebers

Department of Biology, Northern Michigan University, Marquette 49855-5341, USA. jrebers@nmu.edu

Treating Drosophila Kc tissue culture cells with 20-hydroxyecdysone (20E) causes a rapid 10-fold increase in the synthesis of three polypeptides, with molecular weights of 28 kD, 29 kD, and 40 kD (named EIP28, EIP29, and EIP 40, in reference to their molecular weights), as shown by Savakis et al. (1980, 1984). Genomic clones that include Eip40, a gene encoding the EIP40 polypeptide, have been isolated and used to characterize transcription in a 10 kilobase region. At least five different transcripts are produced from this region in Kc cells. One of these transcripts is overlapping and antiparallel to the Eip40 transcript. Although these genes are located quite near one another, their response to 20E varies from little, if any, induction to an induction that is at least 25 fold. Approximately 2.5 kb of DNA which encompasses the Eip40 gene has been sequenced. Analysis of this sequence shows that Eip40 encodes a Drosophila homologue of the enzyme cystathionase. The complementary DNA strand, which produces an 1800 N transcript, has a 645 N open reading frame (ORF). This ORF shows some similarity to cystathionase, the protein encoded by the complementary strand, but shows no detectable similarity to other reported protein sequences.

UI	MeSH Term	Description	Entries
D008969	Molecular Sequence Data	Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.	Sequence Data, Molecular,Molecular Sequencing Data,Data, Molecular Sequence,Data, Molecular Sequencing,Sequencing Data, Molecular
D002460	Cell Line	Established cell cultures that have the potential to propagate indefinitely.	Cell Lines,Line, Cell,Lines, Cell
D004330	Drosophila	A genus of small, two-winged flies containing approximately 900 described species. These organisms are the most extensively studied of all genera from the standpoint of genetics and cytology.	Fruit Fly, Drosophila,Drosophila Fruit Flies,Drosophila Fruit Fly,Drosophilas,Flies, Drosophila Fruit,Fly, Drosophila Fruit,Fruit Flies, Drosophila
D004441	Ecdysterone	A steroid hormone that regulates the processes of MOLTING or ecdysis in insects. Ecdysterone is the 20-hydroxylated ECDYSONE.	20-Hydroxyecdysone,Beta-Ecdysone,Crustecdysone,20 Hydroxyecdysone,Beta Ecdysone
D005786	Gene Expression Regulation	Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control (induction or repression) of gene action at the level of transcription or translation.	Gene Action Regulation,Regulation of Gene Expression,Expression Regulation, Gene,Regulation, Gene Action,Regulation, Gene Expression
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000595	Amino Acid Sequence	The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION.	Protein Structure, Primary,Amino Acid Sequences,Sequence, Amino Acid,Sequences, Amino Acid,Primary Protein Structure,Primary Protein Structures,Protein Structures, Primary,Structure, Primary Protein,Structures, Primary Protein
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D001483	Base Sequence	The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence.	DNA Sequence,Nucleotide Sequence,RNA Sequence,DNA Sequences,Base Sequences,Nucleotide Sequences,RNA Sequences,Sequence, Base,Sequence, DNA,Sequence, Nucleotide,Sequence, RNA,Sequences, Base,Sequences, DNA,Sequences, Nucleotide,Sequences, RNA
D017344	Genes, Insect	The functional hereditary units of INSECTS.	Insect Genes,Gene, Insect,Insect Gene