Identification and characterization of six peroxiredoxin transcripts from mud crab Scylla paramamosain : The first evidence of peroxiredoxin gene family in crustacean and their expression profiles under biotic and abiotic stresses
| Autor: | Yu Yin Chen, Ze Peng Liu, Yi Lian Zhou, Cong Wang, Zhong Kai Zhou, Qi Hui Zhu, Bin Peng Xu, Wen Bin Gu, Dan Dan Tu, Miao An Shu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Salinity Brachyura Immunology Scylla paramamosain Biology Random Allocation 03 medical and health sciences Cadmium Chloride Stress Physiological Phylogenetics Gene expression Animals Protein Isoforms Gene family Amino Acid Sequence RNA Messenger Molecular Biology Gene Phylogeny Vibrio alginolyticus Genetics Sequence Homology Amino Acid Abiotic stress Hydrogen Peroxide Peroxiredoxins 04 agricultural and veterinary sciences Biotic stress biology.organism_classification Invertebrates Recombinant Proteins Poly I-C 030104 developmental biology Gene Expression Regulation Organ Specificity Multigene Family Vertebrates 040102 fisheries 0401 agriculture forestry and fisheries Peroxiredoxin Sequence Alignment |
| Zdroj: | Molecular Immunology. 93:223-235 |
| ISSN: | 0161-5890 |
| DOI: | 10.1016/j.molimm.2017.11.029 |
| Popis: | The peroxiredoxins (Prxs) define a novel and evolutionarily conserved superfamily of peroxidases able to protect cells from oxidative damage by catalyzing the reduction of a wide range of cellular peroxides. Prxs have been identified in prokaryotes as well as in eukaryotes, however, the composition and number of Prxs family members vary in different species. In this study, six Prxs were firstly identified from the mud crab Scylla paramamosain by RT-PCR and RACE methods. Six SpPrxs can be subdivided into three classes: (a) three typical 2-Cys enzymes denominated as Prx1/2, 3, 4, (b) two atypical 2-Cys enzymes known as Prx5-1 and Prx5-2, and (c) a 1-Cys isoform named Prx6. The evolutionarily conserved signatures of peroxiredoxin catalytic center were identified in all six SpPrxs. Phylogenetic analysis revealed that SpPrx3, SpPrx4, SpPrx5s and SpPrx6 were clearly classified into Prx3-6 subclasses, respectively. Although SpPrx1/2 could not be grouped into any known Prx subclasses, SpPrx1/2 clustered together with other arthropods Prx1 or unclassified Prx and could be classified into the typical 2-Cys class. The comparative and evolutionary analysis of the Prx gene family in invertebrates and vertebrates were also conducted for the first time. Tissue-specific expression analysis revealed that these six SpPrxs were expressed in different transcription patterns while the highest expression levels were almost all in the hepatopancreas. Quantitative RT-PCR analysis exhibited that the gene expression profiles of six SpPrxs were distinct when crabs suffered biotic and abiotic stresses including the exposures of Vibrio alginolyticus, poly (I:C), cadmium and hypoosmotic salinity, suggesting that the SpPrxs might play different roles in response to various stresses. The recombinant proteins including the SpPrx1/2, SpPrx4, SpPrx5-1 and SpPrx6 were purified and the peroxidase activity assays indicated that all these proteins can reduce H2O2 in a typical DTT-dependent manner. To our knowledge, this is the first study about the comprehensive characterization of Prx gene family in Scylla paramamosain and even in crustaceans. These results would broaden the current knowledge of the whole Prx family as well as be helpful to understand and clarify the evolutionary pattern of Prx family in invertebrate and vertebrate taxa. |
| Databáze: | OpenAIRE |
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