Dataset Information

Fam20C participates in the shell formation in the pearl oyster, Pinctada fucata.

ABSTRACT: Kinase-family with sequence similarity 20, member C (Fam20C) is a protein kinase, which can phosphorylate biomineralization related proteins in vertebrate animals. However, the function of Fam20C in invertebrate animals especially the role in biomineralization is still unknown. Herein, we cloned the cDNA of fam20C from the pearl oyster, Pinctada fucata. It is showed that the expression of fam20C in the mantle edge was much higher than other tissues. In situ hybridization showed that fam20C was expressed mostly in the outer epithelial cells of the middle fold, indicating it may play important roles in the shell formation. Besides, fam20C expression increased greatly in the D-shape stage of pearl oyster development, when the shell was first formed. During the shell repair process, the expression level of fam20C increased 1.5 times at 6?h after shell notching. Knockdown of fam20C in vivo by RNA interference resulted in abnormally stacking of calcium carbonate crystals at the edges of nacre tablets, showing direct evidence that fam20C participates in the shell formation. This study provides an insight into the role of kinase protein in the shell formation in mollusk and broaden our understanding of biomineralization mechanism.

SUBMITTER: Du J

PROVIDER: S-EPMC5824888 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature

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fam20C participates in the shell formation in the pearl oyster, Pinctada fucata.

Du Jinzhe J Liu Chuang C Xu Guangrui G Xie Jun J Xie Liping L Zhang Rongqing R

Scientific reports 20180223 1

Kinase-family with sequence similarity 20, member C (Fam20C) is a protein kinase, which can phosphorylate biomineralization related proteins in vertebrate animals. However, the function of Fam20C in invertebrate animals especially the role in biomineralization is still unknown. Herein, we cloned the cDNA of fam20C from the pearl oyster, Pinctada fucata. It is showed that the expression of fam20C in the mantle edge was much higher than other tissues. In situ hybridization showed that fam20C was e ...[more]

PMID: 29476076

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Project description:BackgroundThe most critical step in the pearl formation during aquaculture is issued to the proliferation and differentiation of outer epithelial cells of mantle graft into pearl sac. This pearl sac secretes various matrix proteins to produce pearls by a complex physiological process which has not been well-understood yet. Here, we aimed to unravel the genes involved in the development of pearl sac and pearl, and the sequential expression patterns of different shell matrix proteins secreted from the pearl sac during pearl formation by pearl oyster Pinctada fucata using high-throughput transcriptome profiling.ResultsPrincipal component analysis (PCA) showed clearly different gene expression profiles between earlier (before 1 week) and later stages (1 week to 3 months) of grafting. Immune-related genes were highly expressed between 0 h - 24 h (donor dependent) and 48 h - 1 w (host dependent), and in the course of wound healing process pearl sac was developed by two weeks of graft transplantation. Moreover, for the first time, we identified some stem cell marker genes including ABCG2, SOX2, MEF2A, HES1, MET, NRP1, ESR1, STAT6, PAX2, FZD1 and PROM1 that were expressed differentially during the formation of pearl sac. The expression profiling of 192 biomineralization-related genes demonstrated that most of the shell matrix proteins (SMPs) involved in prismatic layer formation were first up-regulated and then gradually down-regulated indicating their involvement in the development of pearl sac and the onset of pearl mineralization. Most of the nacreous layer forming SMPs were up-regulated at 2 weeks after the maturation of pearl sac. Nacrein, MSI7 and shematrin involved in both layer formation were highly expressed during 0 h - 24 h, down-regulated up to 1 week and then up-regulated again after accomplishment of pearl sac formation.ConclusionsUsing an RNA-seq approach we unraveled the expression pattern of the key genes involved in the development of pearl sac and pearl as a result of host immune response after grafting. These findings provide valuable information in understanding the molecular mechanism of pearl formation and immune response in P. fucata.

Dataset Information

Fam20C participates in the shell formation in the pearl oyster, Pinctada fucata.

Publications

fam20C participates in the shell formation in the pearl oyster, Pinctada fucata.

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