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Isolation and characterization of the rat catalase-encoding gene
H Nakashima1, M Yamamoto, K Goto
1Department of Biochemistry, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan.
Gene
|July 15, 1989
Summary
Researchers characterized the rat liver catalase gene, finding it spans 33 kb with 13 exons. Multiple transcription start sites were identified upstream of the gene, lacking a TATA box but containing CCAAT and GC boxes.
Area of Science:
- Biochemistry
- Molecular Biology
- Genetics
Background:
- Catalase (hydrogen peroxide:hydrogen peroxide oxidoreductase, EC 1.11.1.6) is a crucial antioxidant enzyme found in rat liver.
- Understanding the genetic structure of catalase is essential for elucidating its regulation and function.
Purpose of the Study:
- To isolate and characterize the genomic structure of the rat liver catalase gene.
- To identify the transcription start points and analyze the upstream regulatory sequences of the catalase gene.
Main Methods:
- Isolation of overlapping genomic clones using cDNA probes for rat liver catalase.
- Southern blotting analysis and nucleotide sequencing for gene characterization.
- S1 mapping and primer extension analyses to determine transcription start points.
Main Results:
- The rat liver catalase gene was characterized as approximately 33 kb in length.
- The gene comprises 13 exons separated by twelve introns.
- Multiple transcription start points (tsp) were identified between 66 bp and 105 bp upstream of the translational start codon.
- The promoter region lacks a TATA box but contains multiple CCAAT and GC-like boxes.
Conclusions:
- The genomic structure of the rat liver catalase gene has been elucidated.
- The identified transcription start sites and promoter elements provide insights into the transcriptional regulation of catalase.