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Structure of the human neutrophil elastase gene
H Takahashi1, T Nukiwa, K Yoshimura
1Pulmonary Branch, National Heart, Lung, and Blood Institute, Bethesda, Maryland 20892.
The Journal of Biological Chemistry
|October 15, 1988
Summary
Researchers cloned the human neutrophil elastase (NE) gene, revealing its structure on chromosome 11. This powerful protease gene contains regulatory sequences and homologies to other important genes.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- Human neutrophil elastase (NE) is a serine protease found in neutrophils, crucial for connective tissue breakdown.
- Understanding the genetic basis of NE is vital for studying inflammatory and destructive processes.
Purpose of the Study:
- To clone and characterize the gene for human neutrophil elastase (NE).
- To analyze the structure and regulatory elements of the NE gene and its flanking regions.
Main Methods:
- Cloning the NE gene from a human genomic DNA library.
- Sequence analysis of the gene, including exons, introns, and the 5'-flanking region.
- Comparative sequence analysis with other relevant genes (MPO, c-myc).
Main Results:
- The NE gene comprises 5 exons and 4 introns within a 4-kilobase segment on chromosome 11q14.
- The gene encodes a precursor protein with distinct N-terminal and C-terminal signal peptides.
- The 5'-flanking region contains TATA, CAAT, and GC boxes, repetitive sequences, and homology to MPO and c-myc gene regulatory regions.
Conclusions:
- The structural characterization of the NE gene provides insights into its regulation and expression.
- Homologies in the 5'-flanking region suggest potential shared regulatory mechanisms with other genes involved in myeloid cell function.