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Identification of a coproporphyrinogen-III oxidase gene and its correlation with nacre color in Hyriopsis cumingii

文献类型： 外文期刊

作者： Chen, Xiajun 1 ; He, Jixiang 1 ; Zhang, Mengying 2 ; Bai, Zhiyi 2 ; Li, Jiale 2 ;

作者机构： 1.Anhui Acad Agr Sci, Fishery Inst, Anhui Prov Key Lab Aquaculture & Stock Enhancemen, Hefei, Peoples R China

2.Minist Agr, Key Lab Freshwater Aquat Genet Resources, Shanghai, Peoples R China

3.Shanghai Ocean Univ, Natl Demonstrat Ctr Expt Fisheries Sci Educ, Shanghai, Peoples R China

4.Shanghai Ocean Univ, Shanghai Engn Res Ctr Aquaculture, Shanghai, Peoples R China

期刊名称：PLOS ONE （ 影响因子：3.752； 五年影响因子：4.069 ）

ISSN： 1932-6203

年卷期： 2022 年 17 卷 3 期

页码：

收录情况： SCI

摘要： Pearl color is an important factor influencing pearl value, and is affected by the nacre color of the shell in Hyriopsis cumingii. Coproporphyrinogen-III oxidase (CPOX) is a key enzyme in porphyrin synthesis, and porphyrins are involved in color formation in different organisms, including in the nacre color of mussels. In this study, a CPOX gene (HcCPOX) was identified from H. cumingii, and its amino acid sequence was found to contain a coprogen-oxidase domain. HcCPOX mRNA was expressed widely in the tissues of white and purple mussels, and the highest expression was found in the gill, followed by the fringe mantle. The expression of HcCPOX in all tissues of purple mussels (except in the middle mantle) was higher than that of white mussels. Strong hybridization signals for HcCPOX were observed in the dorsal epithelial cells of the outer fold of the mantle. The activity of CPOX in the gill, fringe mantle, and foot of purple mussels was significantly higher than that in white mussels. Moreover, the expression of HcCPOX and CPOX activity were decreased in RNA interference experiments. The findings indicate that HcCPOX might contributes to nacre color formation in H. cumingii by being involved in porphyrin synthesis.

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