Lsu endnote software5/30/2023 LSU proteins are involved in multiple protein–protein interactions, with the literature suggesting they can integrate abiotic and biotic stress responses. Our structural models of LSU1–4 homo- and heterodimers were in agreement with our experimental observations and may help understand their binding properties. Differences in homo- and heterodimer formation were observed. In this work, we investigated interactions between different monomers of LSU1–4. These proteins are small (approximately 100 amino acids), with coiled-coil structures. In Arabidopsis thaliana, there are four members of the LSU family (LSU1–4). The molecular functions of these proteins are unknown however, they were identified as important stress-related hubs in several studies. Members of the plant-specific LSU (RESPONSE TO LOW SULFUR) family are strongly induced during sulfur starvation. 3Department of Biophysics, Institute of Biochemistry and Biophysics Polish Academy of Sciences, Warsaw, Poland.2Laboratory of Mass Spectrometry, Institute of Biochemistry and Biophysics Polish Academy of Sciences, Warsaw, Poland.1Department of Plant Biochemistry, Institute of Biochemistry and Biophysics Polish Academy of Sciences, Warsaw, Poland.Anna Niemiro 1, Dominik Cysewski 2, Jerzy Brzywczy 1, Anna Wawrzyńska 1, Marzena Sieńko 1, Jarosław Poznański 3 and Agnieszka Sirko 1*
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