Laser Raman Spectroscopic Study on Magnetite Formation in Magnetotactic Bacteria

DOI Web Site Web Site 56 References
  • Watanabe Shingo
    Department of Materials Science and Engineering, Muroran Institute of Technology
  • Yamanaka Masaharu
    Department of Materials Science and Engineering, Muroran Institute of Technology
  • Sakai Akira
    Department of Electrical and Electronic Engineering, Muroran Institute of Technology
  • Sawada Ken
    Department of Materials Science and Engineering, Muroran Institute of Technology
  • Iwasa Tatsuo
    Department of Materials Science and Engineering, Muroran Institute of Technology

Bibliographic Information

Other Title
  • ラマン分光法による磁性細菌のマグネタイト合成過程の研究
  • ラマン ブンコウホウ ニ ヨル ジセイ サイキン ノ マグネタイト ゴウセイ カテイ ノ ケンキュウ

Search this article

Abstract

  Magnetotactic bacteria have one or more chains of magnetosome, consisting of nano-sized magnetic crystal covered with a phospholipid bilayer and use it to sense the geomagnetic fields. In order to elucidate the molecular process to make magnetosome from the iron compounds found in the bacteria, laser Raman spectroscopic measurements were performed with the magnetotactic bacterium, Magnetospirillum magnetotacticum MS-1 and the fractions separated from it. The clear Raman signals were observed at 662 cm-1 and 740 cm-1. The former was observed in whole cell and magnetosome fraction, but not in membrane and cytoplasmic fraction and assigned to the Raman signal of magnetite. The Raman signal of the latter was observed not only in the magnetosome fraction, but also in the cytoplasmic fraction and membrane fraction. This signal was assumed to ferrihydrite. Based on the results, the pathway of the magnetosome synthesis and possible roles of ferrihydrite in the magnetotactic bacteria were discussed.<br>

Journal

References(56)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top