Characterization of NADPH-cytochrome P-450 reductase in a mouse hepatoma cell line

1983 ◽  
Vol 18 (3) ◽  
pp. 237-243 ◽  
Author(s):  
Gwen S. Duthu ◽  
Mark S. Nestor ◽  
Judith A. Berliner ◽  
Richard M. Philpot ◽  
Oliver Hankinson
1988 ◽  
Vol 8 (10) ◽  
pp. 4469-4476
Author(s):  
M Zafarullah ◽  
K Bonham ◽  
L Gedamu

The trout metallothionein (MT) genes consist of two members. We describe the structure of the first fish MT (tMT-B) gene which shows an overall resemblance but some remarkable differences with mammalian MT genes. The similarities included (i) tripartite structure of the gene, (ii) conservation of cysteine residues, and (iii) a TATAAA signal and two copies of metal-responsive elements (MREs). The differences consisted of (i) an AT-rich tMT-B promoter compared with highly GC-rich mammalian MT promoters and (ii) a lack of SP1-binding sites in the tMT-B promoter. Functional analysis of the tMT-B 5'-flanking region following fusion with the bacterial chloramphenicol acetyltransferase gene and its transfection into the rainbow trout hepatoma cell line revealed that sequences from positions -600 to +8 are sufficient for regulation by metals. Further deletion analyses of this fragment suggested that a minimum of 100 nucleotides upstream of the transcription initiation site are required for induction by cadmium and zinc. The tMT-B promoter was also functional in the human hepatoblastoma cell line, suggesting that an MT regulatory factor(s) is conserved in phylogenetically distant species like humans and fish.


2006 ◽  
Vol 340 (1) ◽  
pp. 200-208 ◽  
Author(s):  
Eiko Matsuo ◽  
Hideki Tani ◽  
Chang kweng Lim ◽  
Yasumasa Komoda ◽  
Toru Okamoto ◽  
...  

1988 ◽  
Vol 8 (10) ◽  
pp. 4469-4476 ◽  
Author(s):  
M Zafarullah ◽  
K Bonham ◽  
L Gedamu

The trout metallothionein (MT) genes consist of two members. We describe the structure of the first fish MT (tMT-B) gene which shows an overall resemblance but some remarkable differences with mammalian MT genes. The similarities included (i) tripartite structure of the gene, (ii) conservation of cysteine residues, and (iii) a TATAAA signal and two copies of metal-responsive elements (MREs). The differences consisted of (i) an AT-rich tMT-B promoter compared with highly GC-rich mammalian MT promoters and (ii) a lack of SP1-binding sites in the tMT-B promoter. Functional analysis of the tMT-B 5'-flanking region following fusion with the bacterial chloramphenicol acetyltransferase gene and its transfection into the rainbow trout hepatoma cell line revealed that sequences from positions -600 to +8 are sufficient for regulation by metals. Further deletion analyses of this fragment suggested that a minimum of 100 nucleotides upstream of the transcription initiation site are required for induction by cadmium and zinc. The tMT-B promoter was also functional in the human hepatoblastoma cell line, suggesting that an MT regulatory factor(s) is conserved in phylogenetically distant species like humans and fish.


2003 ◽  
Vol 43 (1-3) ◽  
pp. 27-32
Author(s):  
Yutaka Miura ◽  
Miyako Ariga ◽  
Maiko Miyauchi ◽  
Katsuhiko Arai ◽  
Kazumi Yagasaki

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