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09:40
Novel Sequence Discovery by Subtractive Genomics
Published on: January 25, 2019
Single nucleotide polymorphism discovery in the avian Tapasin gene
L Sironi1, B Lazzari, P Ramelli
1Livestock Genomics 2 Unit, Parco Tecnologico Padano-CERSA, 26900 Lodi, Italy.
Poultry Science
|April 18, 2006
Summary
Researchers investigated single nucleotide polymorphism (SNP) frequency in the avian Tapasin gene across chickens, turkeys, and pheasants. They identified 25 SNP sites, primarily in a heterozygous state, highlighting gene conservation.
Area of Science:
- Molecular genetics
- Immunogenetics
- Avian biology
Background:
- Tapasin is a crucial endoplasmic reticulum glycoprotein involved in major histocompatibility complex (MHC) class I molecule assembly.
- The chicken Tapasin gene, located within the MHC, comprises 8 exons.
- Understanding genetic variation in Tapasin is important for avian immunology and breeding.
Purpose of the Study:
- To estimate the frequency of single nucleotide polymorphism (SNP) within the avian Tapasin gene.
- To analyze sequence conservation and identify potential amino acid substitutions in the Tapasin gene across different avian species.
Main Methods:
- Amplification of the Tapasin gene sequence (exons 5-6) from chicken, turkey, and pheasant DNA.
- Sequence analysis using PolyBayes to identify single nucleotide polymorphism (SNP) sites.
- Translation and analysis of coding sequences to detect amino acid substitutions.
Main Results:
- Twenty-five putative single nucleotide polymorphism (SNP) sites were identified when comparing the Tapasin gene sequences of the three species.
- Polymorphisms were predominantly observed in the heterozygous state.
- Sequence analysis revealed a high level of conservation in the Tapasin gene across the studied avian species.
Conclusions:
- The avian Tapasin gene exhibits a notable frequency of single nucleotide polymorphisms (SNPs), primarily in a heterozygous state.
- The significant conservation of the Tapasin gene sequence among species suggests its critical functional importance in avian immunology.
- These findings contribute to the understanding of genetic diversity within the avian Tapasin gene and its implications for MHC class I assembly.
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