An Acidic Matrix Protein, Pif, Is a Key Macromolecule for Nacre Formation

American Association for the Advancement of Science (AAAS) - Tập 325 Số 5946 - Trang 1388-1390 - 2009
Michio Suzuki1, Kazuko Saruwatari2, Toshihiro Kogure2, Yuya Yamamoto3, Tatsuya Nishimura3, Takashi Kato3, Hiromichi Nagasawa1
1Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
2Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
3Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan

Tóm tắt

Making Mother of Pearl Nacre is an iridescent layer of calcium carbonate lining the inside of shells of marine mollusks and is commonly known as “mother of pearl.” It is composed of layers of uniformly oriented crystals of aragonite (a metastable form of calcium carbonate) separated by layers of organic matrix. How the ordered structure of aragonite layers is achieved has been unclear. Suzuki et al. (p. 1388 , published online 13 August 2009; see the Perspective by Kröger ) identified two acidic matrix proteins (Pif 97 and Pif 80) that regulate nacre formation in the Japanese pearl oyster. The proteins appear to form a complex in which Pif 80 binds to aragonite and Pif 97 binds to other macromolecules in the organic matrix.

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American Association for the Advancement of Science (AAAS)

Tập 325 Số 5946

1388-1390

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