Structures of mollusc shell framework proteins

Shu Sudo, Takahiko Fujikawa, Takeshi Nagakura, Takeshi Ohkubo, Kesami Sakaguchi, Minoru Tanaka, Kunio Nakashima and Takao Takahashi ()
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Shu Sudo: *Research Unit, Mikimoto Pharmaceutical Co., Ise
Takahiko Fujikawa: Mie University Faculty of Medicine
Takeshi Nagakura: Mie University Faculty of Medicine
Takeshi Ohkubo: Mie University Faculty of Medicine
Kesami Sakaguchi: Mie University Faculty of Medicine
Minoru Tanaka: Mie University Faculty of Medicine
Kunio Nakashima: Mie University Faculty of Medicine
Takao Takahashi: Mie University Faculty of Bioresources

Nature, 1997, vol. 387, issue 6633, 563-564

Abstract: Abstract Mollusc shells consist of the nacreous mother-of-pearl layer and the prismatic layer. Both layers are microlaminate composites of CaCO3 crystals (aragonite in the nacre and calcite in the prismatic layer) and biopolymers. The main biopolymers are structural proteins, insoluble in water and methanoic acid, which determine the framework of each shell layer1,4 and bind soluble polyanionic proteins2,4 which determine the type of CaCO3 crystal that grows5,6. Here we report the sequences and structures of the framework proteins for the nacreous and prismatic layers of the pearl oyster, Pinctada fucata.

Date: 1997
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DOI: 10.1038/42391

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