Identification of the transcriptional initiation site of ribosomal RNA genes in the crustacean Artemia.
Nucleic Acids Res
; 15(15): 6007-16, 1987 Aug 11.
Article
en En
| MEDLINE
| ID: mdl-3627976
The proximal part of the Intergenic Spacer, as well as most of the External Transcribed Spacer of the ribosomal RNA type I genes from the crustacean Artemia have been sequenced. We have identified in the Intergenic Spacer five repeats of around 600 bp in length and, possibly, two imperfect or truncated repeats, derived from the principal ones. These sequences are separated by 485 bp from the 17S rRNA coding sequence. We have also identified the start point of transcription by S1 nuclease analysis. This start point is found 248 bp inside the first repeat. The sequence around the start point shows homology with that described for other members of the same phylum, mostly insects. The most conserved regions are from -1 to +25, and the G residue at position -16. At least the three 600-bp repeats upstream from that containing the promoter also contain the start point sequence, and could therefore act as initiation sites for snPIRNA and/or as enhancer sequences for ribosomal RNA gene transcription.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Artemia
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Transcripción Genética
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ARN Mensajero
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Mapeo Cromosómico
Tipo de estudio:
Diagnostic_studies
Límite:
Animals
Idioma:
En
Revista:
Nucleic Acids Res
Año:
1987
Tipo del documento:
Article
Pais de publicación:
Reino Unido