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The EGY3 protein is a homologue of site‐2 proteases, which are intramembrane zinc metalloproteases. EGY3 itself lacks proteolytic activity due to the absence of a zinc‐binding motif. Plentiful evidence indicates that such intramembrane ‘pseudoproteases’ play significant roles in many diverse processes occurring within the cell. However, the physiological functions of EGY3, as well as its subcellular...
AtDeg2 is a chloroplast protein with dual protease/chaperone activity. Since data on how the individual activities of AtDeg2 affect growth and development of Arabidopsis thaliana plants is missing, two transgenic lines were prepared that express mutated AtDeg2 versions that have either only protease or chaperone activity and a comprehensive ontogenesis stage-based study was performed comprising wild...
The thylakoid protease AtDeg2 is a non-ATP hydrolyzing chloroplast protease/ chaperone peripherally connected with stromal side of thylakoid membrane. Its linear structure consists of protease domain and two PDZ domains. To unveil the significance of individual domains, chaperone and proteolytic activities of AtDeg2, its mutated recombinant versions have been developed and their ability to suppress...
Nitrate and nitrite reduction centers in nonnodulated and symbiotic yellow lupine were analyzed. In young seedlings, nitrate was exclusively accumulated in roots, which also was shown as the main nitrate reduction center. In contrast, leaves were shown to play a key role in nitrite reduction. A similar distribution of nitrate reductase (NR) and nitrite reductase was found in nodulated plants. However,...
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