Outer fold is sole effective tissue among three mantle folds with regard to oyster shell colour

文献类型： 外文期刊

第一作者： Li, Mai

作者： Li, Mai;Tang, Juyan;Yuan, Mengqiang;Huang, Baoyu;Liu, Yaqiong;Wei, Lei;Han, Yijing;Zhang, Xuekai;Wang, Xiaona;Sang, Xiuxiu;Zhang, Meiwei;Wang, Xiaotong;Yu, Guoxu;Fan, Nini;Cai, Shuai;Zheng, Yanxin

作者机构：

关键词： Crassostrea gigas; Mantle outer fold; Chitin-binding protein; Biological mineralisation; Shell pigmentation

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：8.2； 五年影响因子：7.8 ）

ISSN： 0141-8130

年卷期： 2023 年 241 卷

页码：

收录情况： SCI

摘要： Molluscs constitute the second largest phylum of animals in the world, and shell colour is one of their most important phenotypic characteristics. In this study, we found among three folds on the mantle edge of oyster, only the outer fold had the same colour as the shell. Transcriptome and mantle cutting experiment indicated that the outer fold may be mainly reflected in chitin framework formation and biomineralisation. There were obvious differences in SEM structure and protein composition between the black and white shell periostraca. The black shell periostraca had more proteins related to melanin biosynthesis and chitin binding. Additionally, we identified an uncharacterized protein gene (named as CgCBP) ultra-highly expressed only in the black outer fold and confirmed its function of chitin-binding and CaCO3 precipitation promoting. RNAi also indicated that CgCBP knockdown could change the structure of shell periostracum and reduce shell pigmentation. All these results suggest that the mantle outer fold plays multiple key roles in shell periostraca bioprocessing, and shell periostracum structure affected by chitin-binding protein is functionally correlated with shell pigmentation. The investigation of oyster shell periostracum structure and shell colour will provide a better understanding in pigmentation during biological mineralisation in molluscs.

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