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Journal of Bacteriology, May 2006, p. 3424-3428, Vol. 188, No. 9
0021-9193/06/$08.00+0     doi:10.1128/JB.188.9.3424-3428.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

Positive Selection Acting on a Surface Membrane Protein of the Plant-Pathogenic Phytoplasmas{dagger}

Shigeyuki Kakizawa,1 Kenro Oshima,1 Hee-Young Jung,1 Shiho Suzuki,1 Hisashi Nishigawa,2 Ryo Arashida,1 Shin-ichi Miyata,2 Masashi Ugaki,2 Hirohisa Kishino,1 and Shigetou Namba1*

Division of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan,1 Division of Integrated Biosciences, The University of Tokyo, 202 Bioscience Bldg., 5-1-5 Kashiwanoha, Chiba 277-8562, Japan2

Received 18 November 2005/ Accepted 17 February 2006

Phytoplasmas are plant-pathogenic bacteria that cause numerous diseases. This study shows a strong positive selection on the phytoplasma antigenic membrane protein (Amp). The ratio of nonsynonymous to synonymous substitutions was >1 with all the methods we tested. The clear positive selections imply an important biological role for Amp in host-bacterium interactions.

* Corresponding author. Mailing address: Laboratory of Plant Pathology, Division of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan. Phone: 81-3-5841-5053. Fax: 81-3-5841-5090. E-mail: snamba{at}ims.u-tokyo.ac.jp.

{dagger} Supplemental material for this article may be found at http://jb.asm.org/.

Journal of Bacteriology, May 2006, p. 3424-3428, Vol. 188, No. 9
0021-9193/06/$08.00+0     doi:10.1128/JB.188.9.3424-3428.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.





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