Abstract:
:The rat glucokinase (GK) gene containing the first exon was isolated and its 5' flanking region was characterized by the bacterial chloramphenicol acetyltransferase (CAT) assay. A transient expression assay with a series of 5' deletion constructs (-5.5 k to -48) of GK-CAT fusion genes indicated that the 5' flanking sequence up to nucleotide -87 was sufficient for promoter activity in adult rat hepatocytes, but its activity was much weaker than that of the SV40 enhancer/promoter. Similar promoter activity was also detected in dRLh-84 hepatoma cells, which do not express glucokinase. Insulin treatment caused no change in the CAT activity of hepatocytes transfected with the fusion genes. These results suggest that the 5' flanking region of the glucokinase gene up to -5.5 k does not contain enhancer elements responsible for tissue-specific expression or insulin regulation.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Noguchi T,Takenaka M,Yamada K,Matsuda T,Hashimoto M,Tanaka Tdoi
10.1016/0006-291x(89)91803-2subject
Has Abstractpub_date
1989-11-15 00:00:00pages
1247-52issue
3eissn
0006-291Xissn
1090-2104pii
0006-291X(89)91803-2journal_volume
164pub_type
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