Evolutionary Adaptation of Protein Turnover in White Muscle of Stenothermal Antarctic Fish: Elevated Cold Compensation at Reduced Thermal Responsiveness.

ABSTRACT: Protein turnover is highly energy consuming and overall relates to an organism's growth performance varying largely between species, e.g., due to pre-adaptation to environmental characteristics such as temperature. Here, we determined protein synthesis rates and capacity of protein degradation in white muscle of the cold stenothermal Antarctic eelpout (Pachycara brachycephalum) and its closely related temperate counterpart, the eurythermal common eelpout (Zoarces viviparus). Both species were exposed to acute warming (P. brachycephalum, 0 °C + 2 °C day^-1; Z. viviparus, 4 °C + 3 °C day^-1). The in vivo protein synthesis rate (Ks) was monitored after injection of ¹³C-phenylalanine, and protein degradation capacity was quantif

SUBMITTER: Krebs N 

PROVIDER: S-EPMC10605280 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature