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Journal of Bacteriology, November 2001, p. 6302-6304, Vol. 183, No. 21
0021-9193/01/$04.00+0   DOI: 10.1128/JB.183.21.6302-6304.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Chemical Structure of a Novel Aminophospholipid from Hydrogenobacter thermophilus Strain TK-6

Jun-ichiro Yoshino,1 Yasumasa Sugiyama,2 Shohei Sakuda,2 Tohru Kodama,3 Hiromichi Nagasawa,2 Masaharu Ishii,1 and Yasuo Igarashi1,*

Department of Biotechnology1 and Department of Applied Biological Chemistry,2 Graduate School of Agriculture and Life Sciences, University of Tokyo, Bunkyo-ku, Tokyo 113-8657, and Faculty of Textile Science and Technology, Shinshu University, Ueda-shi, Nagano 386-0018,3 Japan

Received 9 February 2001/Accepted 9 August 2001

The phospholipid composition of Hydrogenobacter thermophilus strain TK-6, an obligately chemolithoautotrophic, extremely thermophilic hydrogen bacterium, was analyzed. Two of four phospholipids detected from the strain were assumed to be phosphatidylinositol and phosphatidylglycerol. An aminophospholipid named PX, whose content among the phospholipids was 65%, was found to have a novel chemical structure by analysis of the dilyso form with nuclear magnetic resonance and fast atom bombardment-mass spectrometry (FAB-MS) and by analysis of the intact PX with FAB-MS as 1,2-diacyl-3-O-(phospho-2'-O-(1'-amino)-2',3',4',5'-pentanetetrol)-sn-glycerol. Structurally similar phospholipids have been identified in Methanospirillum hungatei, Methanolacinia paynteri, and Methanogenium cariaci, which all belong to the Archaea.

* Corresponding author. Mailing address: Department of Biotechnology, Graduate School of Agriculture and Life Sciences, University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan. Phone: 81-3-5841-5142. Fax: 81-3-5841-5272. E-mail: aigara{at}mail.ecc.u-tokyo.ac.jp.

Journal of Bacteriology, November 2001, p. 6302-6304, Vol. 183, No. 21
0021-9193/01/$04.00+0   DOI: 10.1128/JB.183.21.6302-6304.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.


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