Marked Changes in the Ribonuclease Activity of Mature and Immature Gonads of Sea Urchins Hemicentrotus pulcherrimus and Anthocidaris crassispina(Biochemistry)

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概要

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• It is generally impossible to sort male and female sea urchins before they reach maturity, i.e., while they are still in the immature stage. The ribonuclease (RNase) activity of the gonads of immature stage sea urchins consistently shows a constant activity level. Comparison of the RNase activity of the gonads of mature male and female Hemicentrotus pulcherrimus and Anthocidaris crassispina species at pH 5.0 showed that while its mean specific activity in the immature stage of female H. pulcherrimus increased rapidly from 7.35 to 62.79 units/mg, its activity in male H. pulcherrimus decreased from 7.35 to 1.90 units/mg. The same phenomenon was observed in A. crassispina. Based on its optimal pH, substrate specificity, and heat stability the RNase that exhibited these changes was determined to be an enzyme of the RNase T2 type. This enzyme is also thought to exert an influence on sex determination in sea urchins.

• 公益社団法人日本薬学会の論文
• 2008-09-01

著者

• Kiyomoto Masato

  Tateyama Marine Laboratory Marine And Coastal Research Center Ochanomizu University

• Kiyomoto Masato

  Marine And Coastal Research Center Ochanomizu University

• Kiyomoto Masato

  Marine And Costal Research Center

• Kiyomoto Masato

  Tateyama Marine Laboratory Ochanomizu University

• Irie Masachika

  Department of Microbiology, Hoshi College of Pharmacy

• Ohgi Kazuko

  Department of Microbiology, Hoshi College of Pharmacy

• Ohgi K

  Department Of Applied Microbiology Faculty Of Pharmaceutical Sciences Hoshi University

• Ohgi Kazuko

  Department Of Microbiology Hoshi College Of Pharmacy

• Irie M

  Department Of Applied Microbiology Faculty Of Pharmaceutical Sciences Hoshi University

• Irie Masachika

  Department Of Applied Microbiology Faculty Of Pharmaceutical Sciences Hoshi University

• Irie Masachika

  Department Of Microbiology Hoshi College Of Pharmacy

• IWAMA Masanori

  Department of Applied Microbiology, Faculty of Pharmaceutical Sciences, Hoshi University

• SANDA Akihiro

  Department of Public Health, Azabu University

• Sanda A

  Department Of Hygienic Technology College Of Environmental Health Azabu University

• Irie M

  Hoshi Coll. Pharmacy Tokyo Jpn

• Iwama M

  Department Of Microbiology Faculty Of Pharmaceutical Sciences Ohu-university

• Ohgi Kazuko

  Department Of Applied Microbiology Faculty Of Pharmaceutical Sciences Hoshi University

• Ohgi K

  Department Of Microbiology Hoshi College Of Pharmacy

• Sanda Akihiro

  Department of Hygienic Technology, College of Environmental Health, Azabu University

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