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Genes for neurotransmitter synthesis, storage and release
Progress in Clinical and Biological Research
|January 1, 1985
Summary
Catecholamine biosynthetic enzymes share similar protein domains, suggesting they originate from a single gene family. This implies neurotransmitter enzymes and nerve ending proteins may share gene sequences, potentially defining neuron phenotypes.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Catecholamine biosynthesis involves key enzymes like tyrosine hydroxylase.
- Specific antisera can target and lyse distinct neuronal subpopulations.
- Understanding neuron-specific proteins is crucial for defining neuronal phenotypes.
Purpose of the Study:
- To investigate structural similarities among catecholamine biosynthetic enzymes.
- To explore the relationship between neurotransmitter biosynthetic enzymes and nerve ending proteins.
- To propose a model for how gene expression determines neuronal phenotype.
Main Methods:
- Comparative analysis of primary protein structures of catecholamine biosynthetic enzymes.
- Utilizing antisera for complement-mediated lysis of specific synaptosome subpopulations.
- Postulating gene coding sequence similarities based on observed protein domain sharing.
Main Results:
- Tyrosine hydroxylase, dopamine β-hydroxylase, and phenylethanolamine N-methyltransferase share similar protein domains.
- Antisera against neurotransmitter biosynthetic enzymes cause specific lysis of corresponding synaptosomes, indicating shared domains with nerve ending proteins.
- Evidence suggests shared gene coding sequences between neurotransmitter biosynthetic enzymes and nerve ending proteins.
Conclusions:
- Catecholamine biosynthetic enzymes likely derive from a single gene or gene family.
- Neurotransmitter biosynthetic enzymes and specific nerve ending proteins may share protein domains and gene sequences.
- Coordinated expression of these shared genes could determine neuronal phenotype.