Radiation hybrid mapping and comparative sequence analysis of bovine RIG-I and MAVS genes

Area of Science:

• Genomics and Bioinformatics
• Immunology
• Veterinary Science

Background:

• Retinoic acid inducible gene I (RIG-I) and mitochondrial antiviral signaling (MAVS) are key proteins in the innate immune pathway for detecting viral genomes.
• Their role in innate immunity makes RIG-I and MAVS important candidates for studying disease resistance in cattle.

Purpose of the Study:

• To radiation hybrid (RH) map the bovine RIG-I and MAVS genes.
• To perform comparative sequence analysis of partial genomic sequences for bovine RIG-I and MAVS.

Main Methods:

• Utilized a bovine 5000(rad) radiation hybrid (RH) panel for gene mapping.
• Sequenced RIG-I exon 14 and partial MAVS exon 5 across nine cattle breeds.
• Compared generated sequences with existing Bovine Genome Project data.

Main Results:

• RIG-I was successfully mapped to bovine chromosome 8 (BTA08) with a high LOD score (>12).
• MAVS was localized to bovine chromosome 13 (BTA13) with a high LOD score (>12).
• Sequence analysis showed conservation of RIG-I exon 14 and partial MAVS exon 5 across all breeds, with one T-A transversion SNP identified downstream of RIG-I exon 14.

Conclusions:

• The chromosomal locations of bovine RIG-I and MAVS were established using RH mapping.
• The conserved nature of the sequenced gene regions suggests functional importance in cattle.
• These findings support the investigation of RIG-I and MAVS in cattle disease resistance studies.