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Journal Article
Research Support, U.S. Gov't, P.H.S.
Kinase MPK17 and the Peroxisome Division Factor PMD1 Influence Salt-induced Peroxisome Proliferation.
Plant Physiology 2018 January
Peroxisomes are small organelles that house many oxidative reactions. Peroxisome proliferation is induced under multiple stress conditions, including salt stress; however, factors regulating this process are not well defined. We have identified a role for Arabidopsis ( Arabidopsis thaliana ) MAP KINASE17 (MPK17) in affecting peroxisome division in a manner that requires the known peroxisome division factor PEROXISOME AND MITOCHONDRIAL DIVISION FACTOR1 (PMD1). MPK17 and PMD1 are involved in peroxisome proliferation in response to NaCl stress. Additionally, we found that PMD1 is an actin-binding protein and that a functioning actin cytoskeleton is required for NaCl-induced peroxisome division. Our data suggest roles for MPK17 and PMD1 in influencing the numbers and cellular distribution of peroxisomes through the cytoskeleton-peroxisome connection. These findings expand our understanding of peroxisome division and potentially identify factors connecting the actin cytoskeleton and peroxisome proliferation.
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