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The involvement of horizontal transfer (HT) in the evolution of vertebrate transposable elements (TEs) is a matter of an ongoing debate. The phylogenetic relationships between Tc1 TEs, based on limited dataset have been previously used to infer a case of Tc1 HT between the genomes of fish and frogs. Here this hypothesis has been critically evaluated by the experimental approach including comparative...
Estrogen hormones interact with cellular ERs to exert their biological effects in vertebrate animals. Similar to other animals, fishes have two distinct ER subtypes, ERα (NR3A1) and ERβ (NR3A2). The ERβ subtype is found as two different isoforms in several fish species because of a gene duplication event. Although predicted, two different isoforms of ERα have not been demonstrated in any fish species...
The melanocortin-4 receptor (MC4R) is expressed in the hypothalamus and regulates energy intake and body weight. In silico screening of the canine chromosome 1 sequence and a comparison with the porcine MC4R sequence by BLAST were performed. The nucleotide sequence of the whole coding region and 3′- and 5′-flanking regions of the dog (1214 bp) and red fox (1177 bp) MC4R gene was established and high...
Alteration of gene expression is a crucial component of adaptation by animals to hypoxic conditions and is mediated by specific transcription factors, hypoxia-inducible factors (HIFs), which are composed of α and β subunits. In this study, we report the cloning and characterization of two HIF-α subunits, HIF-1α and HIF-2α, and their expression in various tissues of a hypoxia-tolerant marine teleost,...
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