Expression of the gene encoding human brain creatine kinase depends on sequences immediately following the transcription start point.
Gene
; 102(2): 205-12, 1991 Jun 30.
Article
em En
| MEDLINE
| ID: mdl-1840537
ABSTRACT
To localize sequences that are important for regulation of the gene (CK-B) encoding human brain creatine kinase (CK-B), we have functionally dissected the region comprising 1.8 kb of DNA upstream from the main transcription start point (tsp) and the first exon and intron, and made a detailed comparison with the situation in the rat CK-B gene. Upon using the transient chloramphenicol acetyltransferase (CAT) assay in human HeLa and mouse neuroblastoma cells, we have delimited the basal promoter in the human CK-B gene to a segment of 150 nucleotides (nt) immediately preceding the major mRNA cap site. No other essential regulatory sequence is located further upstream. Both from tsp mapping and from mutational inactivation studies, we conclude that of the two T + A-rich motifs in the promoter region, the TTAA motif between nt positions -28 to -25 is of major importance for transcriptional activity. Moreover, and most notably, a region spanning 22 nt of the first exon has a strong stimulatory effect on CK-B/CAT synthesis.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Encéfalo
/
Regulação da Expressão Gênica
/
Regiões Promotoras Genéticas
/
Creatina Quinase
Limite:
Animals
/
Humans
Idioma:
En
Ano de publicação:
1991
Tipo de documento:
Article