ArticlePlant physiology2024
Poaceae plants transfer cyclobutane pyrimidine dimer photolyase to chloroplasts for ultraviolet-B resistance.
Article in Plant physiology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed, 4 citations in OpenAlex.
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6 authors at 1 institution in 1 country.
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Abstract
Photoreactivation enzyme that repairs cyclobutane pyrimidine dimer (CPD) induced by ultraviolet-B radiation, commonly called CPD photolyase (PHR) is essential for plants living under sunlight. Rice (Oryza sativa) PHR (OsPHR) is a unique triple-targeting protein. The signal sequences required for its translocation to the nucleus or mitochondria are located in the C-terminal region but have yet to be identified for chloroplasts. Here, we identified sequences located in the N-terminal region, including the serine-phosphorylation site at position 7 of OsPHR, and found that OsPHR is transported/localized to chloroplasts via a vesicle transport system under the control of serine-phosphorylation. However, the sequence identified in this study is only conserved in some Poaceae species, and in many other plants, PHR is not localized to the chloroplasts. Therefore, we reasoned that Poaceae species need the ability to repair CPD in the chloroplast genome to survive under sunlight and have uniquely acquired this mechanism for PHR chloroplast translocation.
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