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Genes 2018, 9(5), 257; https://doi.org/10.3390/genes9050257

AtPAP2, a Unique Member of the PAP Family, Functions in the Plasma Membrane

College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
These authors contributed equally to this work.
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Author to whom correspondence should be addressed.
Received: 19 March 2018 / Revised: 4 May 2018 / Accepted: 14 May 2018 / Published: 17 May 2018
(This article belongs to the Special Issue Plant Genomics and Epigenomics for Trait Improvement)
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Abstract

Purple acid phosphatases (PAPs) play various physiological roles in plants. AtPAP2 was previously shown to localize to both chloroplasts and mitochondria and to modulate carbon metabolism in Arabidopsis. Over-expression of AtPAP2 resulted in faster growth and increased biomass in several plant species, indicating its great potential for crop improvement of phosphate use and yield. Here, we studied the localization of AtPAP2 by transient expression in tobacco leaves. The results showed AtPAP2 was localized to the plasma membrane through the secretory pathway, which is different from previous studies. We also found that AtPAP2 had a close relationship with fungal PAP2-like proteins based on phylogenetic analysis. In addition, the C-terminal transmembrane domain conserved in land plants is unique among other AtPAPs except AtPAP9, which is a close homolog of AtPAP2. Taken together, our results provide information for further study of AtPAP2 in understanding its special function in crop improvement. View Full-Text
Keywords: purple acid phosphatase; secretory pathway; transmembrane domain; phosphorus nutrition; carbon metabolism; phylogenetic analysis purple acid phosphatase; secretory pathway; transmembrane domain; phosphorus nutrition; carbon metabolism; phylogenetic analysis
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Sun, Q.; Li, J.; Cheng, W.; Guo, H.; Liu, X.; Gao, H. AtPAP2, a Unique Member of the PAP Family, Functions in the Plasma Membrane. Genes 2018, 9, 257.

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