Characterization of the sheep Complement Factor B gene (CFB).
Jinyi Qin1, Kylie Munyard, Chee Y Lee
1School of Biomedical Sciences, Curtin Health Innovation Research Institute, Western Australian Biomedical Research Institute, Curtin University, GPO Box U1987, Perth, 6845 Western Australia, Australia.
The sheep Complement Factor B (CFB) gene within the MHC was sequenced, revealing its location and structure. Genetic variations were found, including two potentially destabilizing substitutions, offering insights into sheep immune system diversity.
Area of Science:
- Genomics
- Immunogenetics
Background:
- The sheep Major Histocompatibility Complex (MHC) contains genes crucial for immune response.
- Complement Factor B (CFB) is a key component of the alternative complement pathway.
Purpose of the Study:
- To determine the genomic sequence and structure of the sheep CFB gene.
- To identify genetic variations within the sheep CFB gene and compare it with other species.
Main Methods:
- Genomic sequencing of sheep CFB gene.
- Bioinformatic analysis of identified polymorphisms and predicted protein structure.
- Comparative analysis with cattle and human CFB sequences.
Main Results:
- Sheep CFB gene located upstream of C2, comprising 18 exons.
- Thirteen single nucleotide polymorphisms identified in merino sheep, with two predicted to destabilize protein structure.
- Sheep and cattle CFB share a 9-nucleotide deletion in exon 18 compared to human CFB.
Conclusions:
- The genomic organization and sequence of sheep CFB have been elucidated.
- Identified genetic variations in sheep CFB may impact protein function and immune response.
- Comparative genomics reveals evolutionary conservation and divergence in CFB across species.
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