軟体動物石灰化組織の鉱物化に関する研究-XI : calciteおよびaragonite層中に含まれるコンキオリンのアミノ酸組成の比較生化学発研究

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1. For exploring whether the protein matrix involved shell mineralization of molluscs also plays as one of the important factors influencing polymorphic formation of carbonate, the amino acid composition of conchiolins from the calcitic and aragonitic layers of some shells of Cephalopoda, Gastropoda and Bivalvia was done automatically by the KLA-2 type Hitachi Amino Acid Analyzer. 2. Aragonitic conchiolin with at least one exception of the conchiolin of spongy body in Sepia esculenta appeared to be characterized by the relatively high concentrations of aspartic acid, serine, glycine and alanine. 3. The large number of aspartic acid, serine and glycine residues and the few number of alanine may be the characteristic amino acid pattern of calcitic conchiolin or the conchiolin of calcitostracum. 4. It was consistently probable that the larger amounts of alanine, leucine and proline but the smaller amounts of serine are present in aragonitic conchiolin, irre-spective of taxonomical groups. 5. In a group, the number of aspartic acid and glycine residues of calcitic proteins was higher, though there was a confusion in aspartic acid of Cephalopoda. Similarly, the higher arginine contents were contained in aragonitic protein. except Gastropoda. 6. Judging from the above results, it is possible that the protein matrix may involve directly or indirectly in some ways with the mechanism of polymorphic formation of carbonate in the mineralization of shells of molluscs. It was also suggested, that certain distinction of amino acid composition among conchiolins appears to occur in correlation with taxonomical groups.
公益社団法人日本水産学会の論文

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和田浩爾
国立真珠研究所

軟体動物石灰化組織の鉱物化に関する研究-XI : calciteおよびaragonite層中に含まれるコンキオリンのアミノ酸組成の比較生化学発研究

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