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Usui Y, Wakabayashi Y, Shimizu T, Tahara YO, Miyata M, Nakamura A, Ito M. A Factor Produced by Kaistia sp. 32K Accelerated the Motility of Methylobacterium sp. ME121. Biomolecules 2020; 10:biom10040618. [PMID: 32316239 PMCID: PMC7226442 DOI: 10.3390/biom10040618] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 04/13/2020] [Accepted: 04/14/2020] [Indexed: 12/23/2022] Open
Abstract
Motile Methylobacterium sp. ME121 and non-motile Kaistia sp. 32K were isolated from the same soil sample. Interestingly, ME121 was significantly more motile in the coculture of ME121 and 32K than in the monoculture of ME121. This advanced motility of ME121 was also observed in the 32K culture supernatant. A swimming acceleration factor, which we named the K factor, was identified in the 32K culture supernatant, purified, characterized as an extracellular polysaccharide (5–10 kDa), and precipitated with 70% ethanol. These results suggest the possibility that the K factor was directly or indirectly sensed by the flagellar stator, accelerating the flagellar rotation of ME121. To the best of our knowledge, no reports describing an acceleration in motility due to coculture with two or more types of bacteria have been published. We propose a mechanism by which the increase in rotational force of the ME121 flagellar motor is caused by the introduction of the additional stator into the motor by the K factor.
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Affiliation(s)
- Yoshiaki Usui
- Graduate School of Life Sciences, Toyo University, Oura-gun, Gunma 374-0193, Japan; (Y.U.); (Y.W.)
| | - Yuu Wakabayashi
- Graduate School of Life Sciences, Toyo University, Oura-gun, Gunma 374-0193, Japan; (Y.U.); (Y.W.)
| | - Tetsu Shimizu
- Faculty of Life and Environmental Sciences, and Microbiology Research Center for Sustainability (MiCS), University of Tsukuba, Tsukuba, Ibaraki 305-8572, Japan; (T.S.); (A.N.)
| | - Yuhei O. Tahara
- Department of Biology, Graduate School of Science, Osaka City University, Osaka 558-8585, Japan; (Y.O.T.); (M.M.)
- The OCU Advanced Research Institute for Natural Science and Technology (OCARINA), Osaka City University, Osaka 558-8585, Japan
| | - Makoto Miyata
- Department of Biology, Graduate School of Science, Osaka City University, Osaka 558-8585, Japan; (Y.O.T.); (M.M.)
- The OCU Advanced Research Institute for Natural Science and Technology (OCARINA), Osaka City University, Osaka 558-8585, Japan
| | - Akira Nakamura
- Faculty of Life and Environmental Sciences, and Microbiology Research Center for Sustainability (MiCS), University of Tsukuba, Tsukuba, Ibaraki 305-8572, Japan; (T.S.); (A.N.)
| | - Masahiro Ito
- Graduate School of Life Sciences, Toyo University, Oura-gun, Gunma 374-0193, Japan; (Y.U.); (Y.W.)
- Bio-Nano Electronics Research Centre, Toyo University, Kawagoe, Saitama 350-8585, Japan
- Correspondence: ; Tel.: +81-273-82-9202
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