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- W2179672741 abstract "Globin X (GbX) is a member of the globin family that emerged early in the evolution of Metazoa. In vertebrates, GbX is restricted to lampreys, fish, amphibians and some reptiles, and is expressed in neurons. Unlike any other metazoan globin, GbX is N-terminally acylated and anchored in the cell membrane via myristoyl and palmitoyl groups, suggesting a unique function. Here, we compared the capacity of GbX to protect a mouse neuronal cell line from hypoxia and reactive oxygen species (ROS) with that of myoglobin. To evaluate the contribution of membrane-binding, we generated a mutated version of GbX without acyl groups. All three globins enhanced cell viability under hypoxia, with myoglobin having the most pronounced effect. GbX but not myoglobin protected the cells from hydrogen peroxide (H2O2)-induced stress. Membrane-bound GbX was significantly more efficient than its mutated, soluble form. Furthermore, myoglobin and mutated GbX increased production of ROS upon H2O2-treatment, while membrane-bound GbX did not. The results indicate that myoglobin enhances O2 supply while GbX protects the cell membrane from ROS-stress. The ancient origin of GbX suggests that ROS-protection reflects the function of the early globins before they acquired a respiratory role." @default.
- W2179672741 created "2016-06-24" @default.
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- W2179672741 date "2016-01-01" @default.
- W2179672741 modified "2023-10-01" @default.
- W2179672741 title "Membrane-bound globin X protects the cell from reactive oxygen species" @default.
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- W2179672741 doi "https://doi.org/10.1016/j.bbrc.2015.11.105" @default.
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