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Evaluating possible maternal effect lethality and genetic background effects in Naa10 knockout mice
Gholson J Lyon1,2, Joseph Longo1, Andrew Garcia1,2
1Human Genetics Department, New York State Institute for Basic Research (IBR) in Developmental Disabilities, Staten Island, New York, United States of America.
Plos One
|May 7, 2024
Summary
N-terminal acetylation (NTA) is crucial, with NAA10 gene variants causing varied phenotypes in mice. Genetic background and environment significantly modulate these NTA-related effects, impacting embryonic development and survival.
Area of Science:
- Biochemistry
- Genetics
- Developmental Biology
Background:
- Amino-terminal (Nt-) acetylation (NTA) modifies ~80% of human proteins.
- The NAA10 gene encodes the catalytic subunit of the N-terminal acetyltransferase A (NatA) complex.
- Genetic variations in human NAA10 are linked to various conditions.
Purpose of the Study:
- To investigate the phenotypic variability of NAA10 gene variants in mice.
- To explore the influence of genetic background and environmental factors on these phenotypes.
- To validate prior findings on NAA10 knockout mouse models.
Main Methods:
- Generation of new genetic alleles in mice.
- Phenotypic analysis of Naa10 knockout and double knockout mice (Naa10-/Y Naa12-/-).
- Assessment of genetic background and environmental effects on observed phenotypes.
Main Results:
- Replication of phenotypes like piebaldism, skeletal defects, and hydrocephaly in mice.
- Demonstration of significant modulation of phenotypes by genetic background and environmental factors.
- Observation of embryonic lethality in Naa10-/y male mice, but no "maternal effect lethality" in heterozygous females.
Conclusions:
- NAA10 gene variants lead to diverse phenotypes in mice, influenced by genetic and environmental context.
- Mouse models with NAA10 variations provide insights into NTA's role in development.
- Further research is needed to fully understand the complex interplay of genetics and environment in NTA-related disorders.
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