کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5592219 1570714 2016 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A novel p38 MAPK indentified from Crassostrea hongkongensis and its involvement in host response to immune challenges
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شناسی مولکولی
پیش نمایش صفحه اول مقاله
A novel p38 MAPK indentified from Crassostrea hongkongensis and its involvement in host response to immune challenges
چکیده انگلیسی
p38 mitogen-activated protein kinases (MAPKs) are conserved serine/threonine-specific kinases that are activated by various extracellular stimuli and play crucial regulatory roles in immunity, development and homeostasis. However, the function of p38 s in mollusks, the second most diverse group of animals, is still poorly understood. In this study, a novel molluscan p38 (designated Chp38) was cloned and characterized from the Hong Kong oyster Crassostrea hongkongensis. Its full-length cDNA encoded a putative protein of 353 amino acids with a calculated molecular weight of approximately 40.3 kDa. Similar to other reported p38 family proteins, the deduced Chp38 sequence contained a conserved dual phosphorylation TGY motif and a substrate binding site of ATRW. Phylogenetic analysis revealed that Chp38 was closest to its homolog from the Pacific oyster and belonged to the mollusk cluster. Quantitative real-time PCR analysis showed that Chp38 was constitutively expressed in all examined oyster tissues and developmental stages and that its expression in hemocytes was significantly up-regulated after pathogen (Vibrio alginolyticus and Staphylococcus haemolyticus) and PAMP (lipopolysaccharide and peptidoglycan) infections. Moreover, overexpression analysis revealed that Chp38 was localized in both the cytoplasm and nucleus of HEK293T cells and that it could significantly enhance AP-1 reporter gene activation in a dose-dependent manner. Altogether, these results provide the first experimental evidence of a functional p38 in oysters and suggest its involvement in the innate immunity of C. hongkongensis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Molecular Immunology - Volume 79, November 2016, Pages 113-124
نویسندگان
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