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Proc Natl Acad Sci U S A. 2012 Dec 18;109(51):20986-91. doi: 10.1073/pnas.1210552109. Epub 2012 Dec 3.

Different secretory repertoires control the biomineralization processes of prism and nacre deposition of the pearl oyster shell.

Author information

1
Ifremer, Centre Ifremer du Pacifique, Unité Mixte de Recherche 241 Ecosystèmes Insulaires Océaniens, Tahiti, 98719 Taravao, French Polynesia. bmarie@mnhn.fr

Abstract

Mollusca evolutionary success can be attributed partly to their efficiency to sustain and protect their soft body with an external biomineralized structure, the shell. Current knowledge of the protein set responsible for the formation of the shell microstructural polymorphism and unique properties remains largely patchy. In Pinctada margaritifera and Pinctada maxima, we identified 80 shell matrix proteins, among which 66 are entirely unique. This is the only description of the whole "biomineralization toolkit" of the matrices that, at least in part, is thought to regulate the formation of the prismatic and nacreous shell layers in the pearl oysters. We unambiguously demonstrate that prisms and nacre are assembled from very different protein repertoires. This suggests that these layers do not derive from each other.

PMID:
23213212
PMCID:
PMC3529032
DOI:
10.1073/pnas.1210552109
[Indexed for MEDLINE]
Free PMC Article

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