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• W2144007216 endingPage "e27258" @default.
• W2144007216 startingPage "e27258" @default.
• W2144007216 abstract "Thylakoidal processing peptidase (TPP) is responsible for removing amino-terminal thylakoid-transfer signals from several proteins in the thylakoid lumen. Three TPP isoforms are encoded by the nuclear genome of Arabidopsis thaliana. Previous studies showed that one of them termed plastidic type I signal peptidase 1 (Plsp1) was necessary for processing three thylakoidal proteins and one protein in the chloroplast envelope in vivo. The lack of Plsp1 resulted in seedling lethality, apparently due to disruption of proper thylakoid development. The physiological roles of the other two TPP homologs remain unknown. Here we show that the three A. thaliana TPP isoforms evolved to acquire diverse functions. Phylogenetic analysis revealed that TPP may have originated before the endosymbiotic event, and that there are two groups of TPP in seed plants: one includes Plsp1 and another comprises the other two A. thaliana TPP homologs, which are named as Plsp2A and Plsp2B in this study. The duplication leading to the two groups predates the gymnosperm-angiosperm divergence, and the separation of Plsp2A and Plsp2B occurred after the Malvaceae-Brassicaceae diversification. Quantitative reverse transcription-PCR assay revealed that the two PLSP2 genes were co-expressed in both photosynthetic tissues and roots, whereas the PLSP1 transcript accumulated predominantly in photosynthetic tissues. Both PLSP2 genes were expressed in the aerial parts of the plsp1-null mutant at levels comparable to those in wild-type plants. The seedling-lethal phenotype of the plsp1-null mutant could be rescued by a constitutive expression of Plsp1 cDNA but not by that of Plsp2A or Plsp2B. These results indicate that Plsp1 and Plsp2 evolved to function differently, and that neither of the Plsp2 isoforms is necessary for proper thylakoid development in photosynthetic tissues." @default.
• W2144007216 created "2016-06-24" @default.
• W2144007216 creator A5003272908 @default.
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• W2144007216 date "2011-11-07" @default.
• W2144007216 modified "2023-10-02" @default.
• W2144007216 title "Functional Diversification of Thylakoidal Processing Peptidases in Arabidopsis thaliana" @default.
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• W2144007216 doi "https://doi.org/10.1371/journal.pone.0027258" @default.
• W2144007216 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3210150" @default.
• W2144007216 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22087276" @default.
• W2144007216 hasPublicationYear "2011" @default.
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