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Retrotransposable CR1-like elements in crotalinae snake genomes
I Nobuhisa1, T Ogawa, M Deshimaru
1Department of Chemistry, Faculty of Science, Kyushu University, Fukuoka, Japan.
Summary
Researchers discovered chicken repeat 1 (CR1)-like elements in snake venom gland genes. These repetitive DNA sequences were found in Trimeresurus flavoviridis and Trimeresurus gramineus, indicating their presence across Crotalinae snake genomes.
Area of Science:
- Genomics
- Molecular Biology
- Herpetology
Background:
- The 3'-flanking region of the BP-II gene in Trimeresurus flavoviridis venom glands contains sequences homologous to avian chicken repeat 1 (CR1)-elements.
- Phospholipase A2 (PLA2) isozymes are crucial components of snake venom.
Purpose of the Study:
- To investigate the presence and distribution of CR1-like elements in snake venom gland genes.
- To identify CR1-like elements in genes of Trimeresurus flavoviridis and Trimeresurus gramineus.
Main Methods:
- Sequence analysis to identify CR1-like elements.
- Southern blot analysis to detect CR1-like elements in snake genomes.
Main Results:
- Ten CR1-like elements were identified in PLA2 isozyme genes, PLA2 inhibitor (PLI) genes, and TATA-box binding protein (TBP) genes from T. flavoviridis and T. gramineus.
- Southern blot analysis confirmed the presence of numerous CR1-like elements in Crotalinae snake genomes.
Conclusions:
- CR1-like elements are present in the venom gland gene families of multiple snake species within the Crotalinae subfamily.
- These findings contribute to understanding the genomic composition and evolution of snake venom glands.