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Molecular biological search for human genes encoding cholinesterases
Molecular Neurobiology
|January 1, 1987
Summary
Researchers isolated human cholinesterase (ChE) cDNA and gene sequences to understand their structure and function. This work aids in characterizing the human ChE gene and related genes for physiological studies.
Area of Science:
- Biochemistry
- Molecular Biology
- Genetics
Background:
- Cholinesterases (ChEs) are crucial enzymes that hydrolyze acetylcholine, terminating neurotransmission.
- Understanding the structure and genes of human ChEs is essential for their physiological roles.
Purpose of the Study:
- To isolate and characterize human cholinesterase (ChE) cDNA and genomic DNA sequences.
- To delineate the structure and properties of human ChE and its coding gene.
Main Methods:
- Oligodeoxynucleotide screening of cDNA libraries with modified probes.
- DNA blot hybridization, enrichment, cloning, and sequencing of genomic DNA fragments.
Main Results:
- Isolated a 2.4-kb human ChE cDNA encoding the mature secretory protein with an N-terminal signal peptide.
- Human ChE sequence shows limited homology to other serine hydrolases but extensive homology to Torpedo californica, Drosophila melanogaster, and bovine thyroglobulin.
- Successfully isolated and sequenced a fragment of the 5'-region of the human ChE gene.
Conclusions:
- The isolated cDNA and genomic sequences provide a foundation for structural characterization of human ChE and related genes.
- Homology suggests a common ancestral gene for ChEs across different species.
- This research facilitates further investigation into the physiological functions of human cholinesterase.