Aragonite shells are more ancient than calcite ones in bivalves: new evidence based on omics

Two calcium carbonate crystal polymorphs, aragonite and calcite, are the main inorganic components of mollusk shells. Some fossil evidences suggest that aragonite shell is more ancient than calcite shell for the Bivalvia. But, the molecular biology evidence for the above deduction is absent. In this...

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Bibliographic Details
Published in:Molecular Biology Reports
Main Authors: Wang, Xiaotong, Li, Li, Zhu, Yabing, Song, Xiaorui, Fang, Xiaodong, Huang, Ronglian, Que, Huayong, Zhang, Guofan, Zhang, GF (reprint author), Chinese Acad Sci, Inst Oceanol, Natl & Local Joint Engn Lab Ecol Mariculture, Qingdao 266071, Peoples R China.
Format: Article in Journal/Newspaper
Language:English
Published: 2014
Subjects:
Crassostrea Gigas
Aragonite Shell
Calcite Shell
Aragonite Sea
Calcite Sea
Biomineralization
Biochemistry & Molecular Biology
Crassostrea gigas
Online Access:http://ir.qdio.ac.cn/handle/337002/24196
https://doi.org/10.1007/s11033-014-3620-9
Description
Summary:Two calcium carbonate crystal polymorphs, aragonite and calcite, are the main inorganic components of mollusk shells. Some fossil evidences suggest that aragonite shell is more ancient than calcite shell for the Bivalvia. But, the molecular biology evidence for the above deduction is absent. In this study, we searched for homologs of bivalve aragonite-related and calcite-related shell proteins in the oyster genome, and found that no homologs of calcite-related shell protein but some homologs of aragonite-related shell proteins in the oyster genome. We explained the results as the new evidence to support that aragonite shells are more ancient than calcite shells in bivalves combined the published biogeological and seawater chemistry data.

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