Prdx6b is one of the two peroxiredoxins (Prdxs), along with Prdx6A, identified in Trematomus bernacchii, an Antarctic teleost. Prdx6b, like other Prdx6 orthologs, likely has peroxidase and phospholipase activities, which are crucial in antioxidant defense and lipid metabolism pathways, playing an important role in maintaining cellular homeostasis in poikilothermic aquatic vertebrates [1].

In the study of T. bernacchii, the temporal expression of Prdx6 mRNA in response to short-term thermal stress showed a general upregulation of prdx6b, suggesting it may be more responsive in adapting to temperature changes compared to prdx6a. The variations of mRNA accumulation were more conspicuous in the heart than the liver, potentially related to behavioral changes in response to elevated temperature [1].

In conclusion, Prdx6b seems to be involved in the thermal stress response of T. bernacchii, playing a role in helping these poikilothermic aquatic vertebrates adapt to different temperature ranges. The study of Prdx6b in this fish model provides insights into how genes in such organisms evolve and function to adapt to their unique environmental conditions [1].

References:

1. Tolomeo, A M, Carraro, A, Bakiu, R, Ferro, D, Santovito, G. 2015. Peroxiredoxin 6 from the Antarctic emerald rockcod: molecular characterization of its response to warming. In Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology, 186, 59-71. doi:10.1007/s00360-015-0935-3. https://pubmed.ncbi.nlm.nih.gov/26433650/