Publications

1. Kojima S, Asai Y, Atsumi T, Kawagishi I, Homma M. J. Mol. Biol. (1999) 285, 1537-1547. 

2. Kojima S, Blair D.F*. Biochemistry (2001) 40, 13041-13050. 

3. Kojima S, Blair D.F*. Biochemistry (2004) 43, 26-34.

4. Kojima S*, Furukawa Y, Matsunami H, Minamino T, Namba K. J. Bacteriol. (2008) 190, 3314-3322. 

5. Kojima S, , , , , Homma M*, Namba K, Imada K*. Proc. Natl. Acad. Sci. USA. (2008) 105,7696-7701.

6. Kojima S, Imada K*, , , , Minamino T, Homma M*, Namba K*. Mol. Microbiol. (2009) 73, 710-718.

7. Zhu S, , , , , Homma M, Kojima S*, Imada K*. Proc. Natl. Acad Sci. USA. (2014) 111, 13523-13528.

8. Ono H, Takashima A, Hirata H, Homma M, Kojima S*. Mol. Microbiol. (2015) 98, 130-141.

9. Kojima S*, Takao M, Almira G, , , Homma M, Kojima C*, Imada K*. Structure (2018) 26, 590-598.

10. Nishikino T*, , , , Kojima S, , , Imada K*. Proc. Natl. Acad. Sci. USA. (2025) 122:e2415713122.

(* denotes corresponding author(s))

2026

• Detection of ring structure and its flexibility in periplasmic region of FliL, bacterial flagellar stator-associate protein, in marine Vibrio. Nishikino T, Takekawa N, Burton-Smith R, Tajimi Y, Murata K, Uchihashi T, Kojima S, Imada K, Homma M*. Mol. Microbiol. (2026) published online July 27th, doi: 10.1111/mmi.70101.

• Molecular basis of high-torque transmission of the Vibrio polar flagellar motor. Zhang L, Tan J, Duan X, Wang X, Wang T, Yuan K, Homma M, Kojima S, Zhou Y*, Zhu Y*. Protein Cell. (2026) doi: 10.1093/procel/pwag025

2025

• Regulatory role of hydrophobic core in the FliG C-terminal domain on the rotary direction of the flagellar motor. Nishikino T*, Hatano A, Kojima S, Homma M. Biomolecules (2025) 15, 212. https://doi.org/10.3390/biom15020212

• Structural insight into sodium ion pathway in the bacterial flagellar stator from marine Vibrio. Nishikino T*, Takekawa N, Kishikawa JI, Hirose M, Kojima S, Homma M, Kato T, Imada K*. Proc Natl Acad Sci U S A (2025) 122:e2415713122. doi:10.1073/pnas.2415713122.

2024

• Structure, function, and biophysics of bacterial motility and the flagellar motor—IUPAB2024 session commentary Baker MAB*, Kojima S*. Biophysical Reviews (2024) 16:537-538. https://doi.org/10.1007/s12551-024-01243-0

• Structural analysis of S-ring composed of FliFG fusion proteins in marine Vibrio polar flagellar motor. Takekawa N, Nishikino T, Kishikawa JI, Hirose M, Kinoshita M, Kojima S, Minamino T, Uchihashi T, Kato T, Imada K, Homma M*. mBio. (2024) 15:e0126124. doi:10.1128/mbio.01261-24.

• Deciphering the genomes of motility-deficient mutants of Vibrio alginolyticus 138-2. Uesaka K, Inaba K, Nishioka N, Kojima S, Homma M*, Ihara K*. Peer J. (2024) 12:e17126. DOI 10.7717/peerj.17126.

• *Roles of linker region flanked by transmembrane and peptidoglycan binding region of PomB in energy conversion of the Vibrio flagellar motor. Miyamura Y, Nishikino T, Koiwa H, Homma M*, Kojima S*. Genes Cells (2024) 29:282-289, doi: 10.1111/gtc.13102. 

2023

• Changes in the hydrophobic network of the FliGMC domain induce rotational switching of the flagellar motor. Nishikino T, Hijikata A, Kojima S, Shirai T, Kainosho M, Homma M*, Miyanoiri Y*. iScience (2023) 26:107320. doi: 10.1016/j.isci.2023.107320

• Ring formation by Vibrio fusion protein composed of FliF and FliG, MS-ring and C-ring component of bacterial flagellar motor in membrane. Takahashi K, Nishikino T, Kajino H, Kojima S, Uchihashi T*, Homma M*. Biophysics and Physicobiology (2023) 20, e200028 doi: 10.2142/biophysico.bppb-v20.0028

• *Interaction of FlhF, SRP-like GTPase with FliF, MS ring component assembling the initial structure of flagella in marine Vibrio. Fukushima Y, Homma M*, Kojima S*. J. Biochem. (2023) 174:125-130.

• Site-Directed Cross-Linking Between Bacterial Flagellar Motor Proteins In Vivo. Terashima H*, Homma M, Kojima S. Methods Mol Biol (2023) 2646:71-82. doi: 10.1007/978-1-0716-3060-0_7.

• *Purification of the Na+-Driven PomAB Stator Complex and Its Analysis Using ATR-FTIR Spectroscopy. Kojima S*, Homma M, Kandori H*. Methods Mol Biol (2023) 2646:95-107. doi: 10.1007/978-1-0716-3060-0_9.

2022

• *Function and structure of FlaK, a master regulator of the polar flagellar genes in marine Vibrio. Homma M*, Kobayakawa T, Hao Y, Nishikino T, Kojima S*. J. Bacteriol. (2022) 204:e0032022. doi: 10.1128/jb.00320-22.

• Structure of MotA, a flagellar stator protein, from hyperthermophile. Nishikino T*, Takekawa N, Tran DP, Kishikawa J, Hirose M, Onoe S, Kojima S, Homma M, Kitao A, Kato T, Imada K*. Biochem Biophys Res Commun (2022) 631:78-85. doi: 10.1016/j.bbrc.2022.09.072.

• *Formation of multiple flagella caused by a mutation of the flagellar rotor protein FliM in Vibrio alginolyticus. Homma M*, Takekawa N, Fujiwara K, Hao Y, Onoue Y, Kojima, S*. Genes Cells (2022) 27:568-578. DOI: 10.1111/gtc.12975

• *Functional analysis of the N-terminal region of Vibrio FlhG, a MinD-type ATPase in flagellar number control. Homma M*, Mizuno A, Hao Y, Kojima S*. J. Biochem. (2022) 172:99-107. doi: 10.1093/jb/mvac047

• *The periplasmic domain of the ion-conducting stator of bacterial flagella regulates force generation. Homma M* and Kojima S*. Front Microbiol (2022) 13:869187. doi: 10.3389/fmicb.2022.869187

• Mutations in the stator protein PomA affect switching of rotational direction in bacterial flagellar motor. Terashima H*, Hori K, Ihara K, Homma M*, Kojima S. Sci. Rep. (2022) 12:2979 doi: 10.1038/s41598-022-06947-5

• Roles of the second messenger c-di-GMP in bacteria: Focusing on the topics of flagellar regulation and Vibrio spp. Homma M*, Kojima S. Genes Cells (2022) 27:157-172. DOI: 10.1111/gtc.12921 

• Hoop-like role of the cytosolic interface helix in Vibrio PomA, an ion-conducting membrane protein, in the bacterial flagellar motor. Nishikino T, Sagara Y, Terashima H, Homma M* and Kojima S*. J Biochem (2022) 171:443-450. doi: 10.1093/jb/mvac001

• Achievements in bacterial flagellar research with focus on Vibrio species. Homma M*, Nishikino T, Kojima S. Microbiol Immunol (2022) 66:75-95. DOI: 10.1111/1348-0421.12954

2021

• Stator Dynamics Depending on Sodium Concentration in Sodium-Driven Bacterial Flagellar Motors. Lin T-S, Kojima S, Fukuoka H, Ishijima A, Homma M and Lo C-J* Front Microbiol (2021) 12:765739. doi: 10.3389/fmicb.2021.765739

• ZomB is essential for chemotaxis of Vibrio alginolyticus by the rotational direction control of the polar flagellar motor. Takekawa N*, Nishikino T, Hori K, Kojima S, Imada K, Homma M*. Genes Cells (2021) 26:927-937. DOI: 10.1111/gtc.12895

• A slight bending of an α-helix in FliM creates a counterclockwise-locked structure of the flagellar motor in Vibrio. Takekawa N*, Nishikino T, Yamashita T, Hori K, Onoue Y, Ihara K, Kojima S, Homma M*, Imada K. J Biochem (2021) 170:531-538. doi: 10.1093/jb/mvab074.

• Putative spanner function of the Vibrio PomB plug region in the stator rotation model for flagellar motor. Homma M*, Terashima H, Koiwa H, Kojima S. J Bacteriol (2021) 203: e00159-21. doi:10.1128/JB.00159-21. 

• Site-directed crosslinking identifies the stator-rotor interaction surfaces in a hybrid bacterial flagellar motor. Terashima H*, Kojima S, Homma M*. J Bacteriol (2021) 203:e00016-21. doi:10.1128/JB.00016-21. 

• Role of the N- and C-terminal regions of FliF, the MS ring component in Vibrio flagellar basal body. Kojima S, Kajino H, Hirano K, Inoue Y, Terashima H, Homma M*. J Bacteriol (2021) 03:e00009-21. doi:10.1128/JB.00009-21.

• Two distinct conformations in 34 FliF subunits generate three different symmetries within the flagellar MS-ring. Takekawa N, Kawamoto A, Sakuma M, Kato T, Kojima S, Kinoshita M, Minamino T, Namba K, Homma M*, Imada K*. mBio (2021) 12:e03199-20. doi: 10.1128/mBio.03199-20.

2020

• The flagellar motor of Vibrio alginolyticus undergoes major structural remodeling during rotational switching. Carroll BL, Nishikino T, Guo W, Zhu S, Kojima S, Homma M, Liu J. eLife (2020) 9:e61446. doi: 10.7554/eLife.61446.

• Assembly mechanism of a supramolecular MS-ring complex to initiate bacterial flagellar biogenesis in Vibrio species. Terashima H, Hirano K, Inoue Y, Tokano T, Kawamoto A, Kato T, Yamaguchi E, Namba K, Uchihashi T, Kojima S, Homma M. J Bacteriol (2020) 202:e00236-20. doi: 10.1128/JB.00236-20

• Live cell fluorescence imaging reveals dynamic production and loss of bacterial flagella. Zhuang XY, Guo S, Li Z, Zhao Z, Kojima S, Homma M, Wang P, Lo CJ, Bai F. Mol Microbiol (2020) 114:279-291. DOI: 10.1111/mmi.14511

• *Regulation of the single polar flagellar biogenesis. Kojima S, Terashima H, Homma M. Biomolecules (2020) 10(4):E533. doi:10.3390/biom10040533

• *Characterization of the MinD/ParA-type ATPase FlhG in Vibrio alginolyticus and implications for function of its monomeric form. Kojima S, Imura Y, Hirata H, Homma M. Genes Cells (2020) Apr;25(4):279-287. doi:10.1111/gtc.12754

• Characterization of FliL proteins in Bradyrhizobium diazoefficiens: lateral FliL supports swimming motility, and subpolar FliL modulates the lateral flagella system. Mengucci F, Dardis C, Mongiardini EJ, Althabegoiti MJ, Partridge JD, Kojima S, Homma M, Quelas JI, Lodeiro AR. J Bacteriol (2020) 202:e00708-19. doi:10.1128/JB.00708-19

• In situ structure of the Vibrio polar flagellum reveals distinct outer membrane complex and its specific interaction with the stator. Zhu S, Nishikino T, Takekawa N, Terashima H, Kojima S, Imada K, Homma M, Liu J. J Bacteriol (2020) 202:e00592-19 doi:10.1128/JB.00592-19.

• Tree of Motility – A Proposed History of Motility Systems in the Tree of Life – Miyata M, Robinson RC, Uyeda TQ, Fukumori Y, Fukushima S, Haruta S, Homma M, Inaba K, Ito M, Kaito C, Kato K, Kenri T, Kinosita Y, Kojima S, Minamino T, Mori H, Nakamura S, Nakane D, Nakayama K, Nishiyama M, Shibata S, Shimabukuro K, Tamakoshi M, Taoka A, Tashiro Y, Tulum I, Wada H, Wakabayashi KI. Genes Cells (2020) 25:6-21. doi:10.1111/gtc.12737

• Characterization of PomA periplasmic loop and sodium ion entering in stator complex of sodium-driven flagellar motor. Nishikino T, Iwatsuki H, Mino T, Kojima S, Homma M. J Biochem (2020) 167(4):389-398. doi: 10.1093/jb/mvz102.

2019

• Effect of sodium ions on conformations of the cytoplasmic loop of the PomA stator protein of  Vibrio alginolyticus. Mino T, Nishikino T, Iwatsuki H, Kojima S, Homma M. J Biochem (2019) 166:331-341. doi: 10.1093/jb/mvz040. 

• Structure of the periplasmic domain of SflA involved in spatial regulation of the flagellar biogenesis of Vibrio reveals a TPR/SLR -like fold. Sakuma M, Nishikawa S, Inaba S, Nishigaki T, Kojima S, Homma M, Imada K. J Biochem (2019) 166:197-204. doi: 10.1093/jb/mvz027

• *Effect of PlzD, a YcgR homolog of c-di-GMP binding protein, on polar flagellar motility in Vibrio alginolyticus. Kojima S, Yoneda T, Morimoto W, Homma M. J Biochem (2019) 166: 77-88. doi: 10.1093/jb/mvz014. 

• Structure of Vibrio FliL, a new stomatin-like protein that assists the bacterial flagellar motor function. Takekawa N, Isumi M, Terashima H, Zhu S, Nishino Y, Sakuma M, Kojima S, Homma M, Imada K. mBio (2019) 10:e00292-19. doi: 10.1128/mBio.00292-19.

2018

• Rotational direction of flagellar motor from the conformation of FliG middle domain in marine Vibrio. Nishikino T, Hijikata A, Miyanoiri Y, Onoue Y, Kojima S, Shirai T, Homma M. Sci Rep (2018) 8:17793. DOI:10.1038/s41598-018-35902-6

• The Vibrio H-ring facilitates the outer membrane penetration of polar-sheathed flagellum. Zhu S, Nishikino T, Kojima S, Homma M, Liu J. J Bacteriol (2018) 200:e00387-18 doi:10.1128/JB.00387-18.

• Biochemical analysis of GTPase FlhF which controls the number and position of flagellar formation in marine Vibrio. Kondo S, Imura Y, Mizuno A, Kojima S, Homma M. Sci Rep (2018) 8:12115. doi: 10.1038/s41598-018-30531-5

• Autonomous control mechanism of stator assembly in the bacterial flagellar motor in response to changes in the environment. Minamino T, Terahara N, Kojima S, Namba K. Mol Microbiol (2018) 108: 723-734. doi: 10.1111/mmi.14092.

• FliL association with flagellar stator in the sodium-driven Vibrio motor characterized by the fluorescent microscopy. Lin TS, Zhu S, Kojima S, Homma M, Lo CJ. Sci Rep (2018) Jul 24;8(1):11172. doi: 10.1038/s41598-018-29447-x.

• The role of conserved charged residues in the bidirectional rotation of the bacterial flagellar motor. Onoue Y, Takekawa N, Nishikino T, Kojima S, Homma M. MicrobiologyOpen (2018) Aug;7(4):e00587. doi: 10.1002/mbo3.587. 

• *The helix rearrangement in the periplasmic domain of the flagellar stator B subunit activates peptidoglycan binding and ion influx. Kojima S, Takao M, Almira G, Kawahara I, Sakuma M, Homma M, Kojima C, Imada K. Structure (2018) 26, 590-598.

• Solution structure analysis of the periplasmic region of bacterial flagellar motor stators by small angle X-ray scattering. Liew C.W, Hynson R.M, Ganuelas L.A, Shah-Mohammadi N, Duff A.P, Kojima S, Homma M, Lee L.K. Biochem Biophys Res Commun (2018) 495, 1614-1619.

2017

• Analysis of the GTPase motif of FlhF in the control of the number and location of polar flagella in Vibrio alginolyticus. Kondo S, Homma M, Kojima S. Biophysics and Physicobiology (2017) 14, 173-181.

• Molecular architecture of the sheathed polar flagellum in Vibrio alginolyticus. Zhu S, Nishikino T, Hu B, Kojima S, Homma M, Liu J. Proc Natl Acad Sci U S A (2017) 114, 10966-10971.

• Structural and functional analysis of the C-terminal region of FliG, an essential motor component of Vibrio Na+-driven flagella. Miyanoiri Y, Hijikata A, Nishino Y, Gohara M, Onoue Y, Kojima S, Kojima C, Shirai T, Kainosho M, Homma M. Structure (2017) 25, 1-9.

• Mechanism of stator assembly and incorporation into the flagellar motor. Kojima S. Methods Mol Biol (2017) 1593, 147-159.

• Localization and domain characterization of the SflA regulator of flagellar formation in Vibrio alginolyticus. Inaba S, Nishigaki T, Takekawa N, Kojima S, Homma M. Genes Cells (2017) 7, 619-627.

• Biochemical characterization of the flagellar stator-associated inner membrane protein FliL from Vibrio alginolyticus. Kumar A, Isumi M, Sakuma M, Zhu S, Nishino Y, Onoue Y, Kojima S, Miyanoiri Y, Imada K, Homma M. J Biochem (2017) 161, 331-337.

• Mutational analysis and overproduction effects of MotX, an essential component for motor function of Na+-driven polar flagella of Vibrio. Takekawa N, Kojima S, Homma M. J Biochem (2017) 161, 159-166.

2016

• *Studies on the mechanism of bacterial flagellar rotation and the flagellar number regulation. Kojima S. Nihon Saikingaku Zasshi. (2016) 71, 185-197.　平成28年小林六造記念賞受賞論文

• HubP, a polar landmark protein, regulates flagellar number by assisting in the proper polar localization of FlhG in Vibrio alginolyticus. Takekawa N, Kwon S, Nishioka N, Kojima S, Homma M. J Bacteriol (2016) 198, 3091-3098.

• The tetrameric MotA complex as the core of the flagellar motor stator from hyperthermophilic bacterium. Takekawa N, Terahara N, Kato T, Gohara M, Mayanagi K, Hijikata A, Onoue Y, Kojima S, Shirai T, Namba K, Homma M. Sci Rep (2016) 6, 31526; doi: 10.1038/srep31526.

• Serine suppresses the motor function of a periplasmic PomB mutation in the Vibrio flagella stator. Nishikino T, Zhu S, Takekawa N, Kojima S, Onoue Y, Homma M. Genes Cells (2016) 21, 505-516.

• FliH and FliI ensure efficient energy coupling of flagellar type III protein export in Salmonella. Minamino T, Kinoshita M, Inoue Y, Morimoto YV, Ihara K, Koya S, Hara N, Nishioka N, Kojima S, Homma M, Namba K. MicrobiologyOpen (2016) 5, 424-435.

2015

• *Dynamism and regulation of the stator, the energy conversion complex of the bacterial flagellar motor. Kojima S. Curr Opin Microbiol (2015) 28, 66-71.

• Nascent chain-monitored remodeling of the Sec machinery for salinity adaptation of marine bacteria. Ishii E, Chiba S, Hashimoto N, Kojima S, Homma M, Ito K, Akiyama Y, Mori H. Proc Natl Acad Sci U S A (2015) 112, E5513-E5522.

• Sodium-driven energy conversion for the flagellar rotation of the earliest divergent hyperthermophilic bacterium. Takekawa N, Nishiyama M, Kaneseki T, Kanai T, Atomi H, Kojima S and Homma M. Sci Rep (2015) 5, 12711; doi: 10.1038/srep12711.

• Effect of FliG three-amino-acids deletion in Vibrio polar-flagellar rotation and formation. Onoue Y, Kojima S, Homma M. J Biochem (2015) 158, 523-529.

• *The MinD homolog FlhG regulates the synthesis of the single polar flagellum of Vibrio alginolyticus. Ono H, Takashima A, Hirata H, Homma M, Kojima S. Mol Microbiol (2015) 98, 130-141.

• FliL associates with the stator to support torque generation of the sodium-driven polar flagellar motor of Vibrio. Zhu S, Kumar A, Kojima S, Homma M. Mol Microbiol (2015) 98, 101-110.

• Functional chimeras of flagellar stator proteins between E. coli MotB and Vibrio PomB at the periplasmic region in Vibrio or E. coli. Nishino Y, Onoue Y, Kojima S, Homma M. MicrobiologyOpen (2015) 4: 323–331.

• *Interaction of the C-terminal tail of FliF with FliG from the Na+-driven flagellar motor of Vibrio alginolyticus. Ogawa R, Abe-Yoshizumi R, Kishi T, Homma M, Kojima S. J Bacteriol (2015) 197, 63-72.

2014

• *Conformational change in the periplasmic region of the flagellar stator coupled with the assembly around the rotor. Zhu S, Takao M, Li N, Sakuma M, Nishino Y, Homma M, Kojima S, Imada K. Proc Natl Acad Sci U. S. A. (2014) 111, 13523-13528.

• Contribution of many charged residues at the stator-rotor interface of the Na+-driven flagellar motor to torque generation in Vibrio alginolyticus. Takekawa N, Kojima S, Homma M. J Bacteriol (2014) 196, 1377-1385.

• Construction of functional fragments of the cytoplasmic loop with the C-terminal region of PomA, a stator component of the Vibrio Na+ driven flagellar motor. Onoue Y, Abe-Yoshizumi R, Gohara M, Kobayashi S, Nishioka N, Kojima S, Homma M. J Biochem. (2014) 155, 207-216.

2013

• Structure, gene regulation and environmental response of flagella in Vibrio. Zhu S, Kojima S, Homma M. Front Microbiol (2013) 4:410. doi: 10.3389/fmicb.2013.00410

• Biophysical characterization of the C-terminal region of FliG, an essential rotor component of the Na+ driven flagellar motor. Gohara M, Kobayashi S, Abe-Yoshizumi R, Nonoyama N, Kojima S, Asami Y and Homma M. J Biochem (2014) 155, 83-89.

• Mutation in the a-subunit of F1FO-ATPase causes an increased motility phenotype through the sodium-driven flagella of Vibrio. Terashima H, Terauchi T, Ihara K, Nishioka N, Kojima S, Homma M. J Biochem (2013) 154, 177-184.

• Insight into the assembly mechanism in the supramolecular rings of the sodium-driven Vibrio flagellar motor from the structure of FlgT. Terashima H, Li N, Sakuma M, Koike M, Kojima S, Homma M, Imada K. Proc Natl Acad Sci U S A (2013) 110, 6133-6138.

• Fluorescence imaging of GFP-fused periplasmic components of Na+-driven flagellar motor using Tat pathway in Vibrio alginolyticus. Takekawa N, Kojima S, Homma M. J Biochem (2013) 153, 547-553.

• Expression, purification and biochemical characterization of the cytoplasmic loop of PomA, a stator component of the Na+ driven flagellar motor. Abe-Yoshizumi R, Kobayashi S, Gohara M, Hayashi K, Kojima C, Kojima S, Sudo Y, Asami Y, Homma M. Biophysics (2013) 9, 21-29

• Na+ conductivity of the Na+-driven flagellar motor complex composed of unplugged wild-type or mutant PomB with PomA. Takekawa N, Terauchi T, Morimoto YV, Minamino T, Lo CJ, Kojima S, Homma M. J Biochem (2013) 153, 441-451.

• A novel dnaJ family gene, sflA, encodes an inhibitor of flagellation in marine Vibrio species. Kitaoka M, Nishigaki T, Ihara K, Nishioka N, Kojima S, Homma M. J Bacteriol (2013) 195, 816-822.

2012

• *Intragenic suppressor of a plug deletion nonmotility mutation in PotB, a chimeric stator protein of sodium-driven flagella. Zhu S, Homma M, Kojima S. J Bacteriol (2012) 194, 6728-6735.

• Bacterial motility measured by a miniature chamber for high-pressure microscopy. Nishiyama M and Kojima S. Int J Mol Sci (2012) 13, 9225-9239.

• Characterization of PomA mutants defective in the functional assembly of the Na+-driven flagellar motor in Vibrio alginolyticus. Takekawa N, Li N, Kojima S, Homma M. J Bacteriol (2012) 194, 1934-1939.

• Nanofork for single cells adhesion measurement via ESEM-nanomanipulator system. Ahmad MR, Nakajima M, Kojima M, Kojima S, Homma M, Fukuda T. IEEE Trans Nanobioscience (2012) 11, 70-78.

2011

• Evaluation of the single yeast cell's adhesion to ITO substrates with various surface energies via ESEM nanorobotic manipulation system. Shen Y, Ahmad MR, Nakajima M, Kojima S, Homma M, Fukuda T. IEEE Trans Nanobioscience (2011) 10, 217-224.

• *Mutations targeting the C-terminal domain of FliG can disrupt motor assembly in the Na+-driven flagella of Vibrio alginolyticus. Kojima S, Nonoyama N, Takekawa N, Fukuoka H, Homma M. J Mol Biol (2011) 414, 62-74.

• M153R mutation in a pH-sensitive green fluorescent protein stabilizes its fusion proteins. Morimoto YV, Kojima S, Namba K, Minamino T. PLoS One (2011) May 3;6(5):e19598.

• Effect of ambient humidity on the strength of the adhesion force of single yeast cell inside environmental-SEM. Shen Y, Nakajima M, Ahmad MR, Kojima S, Homma M, Fukuda T. Ultramicroscopy (2011) 111, 1176-1183.

• Design and characterization of nanoknife with buffering beam for in situ single-cell cutting. Shen Y, Nakajima M, Yang Z, Kojima S, Homma M, Fukuda T. Nanotechnology (2011) 22(30):305701.

• A conserved residue, PomB-F22, in the transmembrane segment of the flagellar stator complex, has a critical role in conducting ions and generating torque. Terauchi T, Terashima H, Kojima S, Homma M. Microbiology (2011) 157, 2422-2432.

• *Characterization of the periplasmic region of PomB, a Na+-driven flagellar stator protein in Vibrio alginolyticus. Li N, Kojima S, Homma M. J Bacteriol (2011) 193, 3773-3784.

• Study of the time effect on the strength of cell-cell adhesion force by a novel nano-picker. Shen Y, Nakajima M, Kojima S, Homma M, Fukuda T. Biochem Biophys Res Commun (2011) 409, 160-165.

2010

• The flagellar basal body-associated protein FlgT is essential for a novel ring structure in the sodium-driven Vibrio motor. Terashima H, Koike M, Kojima S, Homma M. J Bacteriol (2010) 192, 5609-5615.

• Disulphide cross-linking between the stator and the bearing components in the bacterial flagellar motor. Hizukuri Y, Kojima S, Homma M. J Biochem (2010) 148, 309-318.

• Functional transfer of an essential aspartate for the ion-binding site in the stator proteins of the bacterial flagellar motor. Terashima H, Kojima S, Homma M. J Mol Biol (2010) 397, 689-696.

• Nanoindentation methods to measure viscoelastic properties of single cells using sharp, flat, and buckling tips inside ESEM. Ahmad MR, Nakajima M, Kojima S, Homma M, Fukuda T. IEEE Trans Nanobioscience (2010) 9, 12-23.

• Isolation of basal bodies with C-ring components from the Na+-driven flagellar motor of Vibrio alginolyticus. Koike M, Terashima H, Kojima S, Homma M. J Bacteriol (2010) 192, 375-378.

2009

• Comparative study of the ion flux pathway in stator units of proton- and sodium-driven flagellar motors. Sudo Y, Terashima H, Abe-Yoshizumi R, Kojima S, Homma M. Biophysics (2009) 5, 45-52

• Interaction between Na+ ion and carboxylates of the PomA-PomB stator unit studied by ATR-FTIR spectroscopy. Sudo Y, Kitade Y, Furutani Y, Kojima M, Kojima S, Homma M, Kandori H. Biochemistry (2009) 48, 11699-11705.

• Rotational speed control of Na+-driven flagellar motor by dual pipettes. Nogawa K, Kojima M, Nakajima M, Kojima S, Homma M, Fukuda T. IEEE Trans Nanobioscience (2009) 8, 341-348.

• Mutational analysis of the GTP-binding motif of FlhF which regulates the number and placement of the polar flagellum in Vibrio alginolyticus. Kusumoto A, Nishioka N, Kojima S, Homma M. J Biochem (2009) 146, 643-650.

• Stator assembly and activation mechanism of the flagellar motor by the periplasmic region of MotB. Kojima S, Imada K, Sakuma M, Sudo Y, Kojima C, Minamino T, Homma M, Namba K. Mol Microbiol (2009) 73, 710-718.

• The peptidoglycan-binding (PGB) domain of the Escherichia coli pal protein can also function as the PGB domain in E. coli flagellar motor protein MotB. Hizukuri Y, Morton JF, Yakushi T, Kojima S, Homma M. J Biochem (2009) 146, 219-229.

• Sodium-dependent dynamic assembly of membrane complexes in sodium-driven flagellar motors. Fukuoka H, Wada T, Kojima S, Ishijima A, Homma M. Mol Microbiol (2009) 71, 825-835.

2008

• Cell-free synthesis of the torque-generating membrane proteins, PomA and PomB, of the Na+-driven flagellar motor in Vibrio alginolyticus. Terashima H, Yoshizumi R, Kojima S, Homma M. J. Biochem. (2008) 144, 635-642.

• Suppressor analysis of the MotB(D33E) mutation to probe bacterial flagellar motor dynamics coupled with proton translocation. Che YS, Nakamura S, Kojima S, Kami-ike N, Namba K, Minamino T. J. Bacteriol. (2008) 190, 6660-6667.

• The effects of cell sizes, environmental conditions, and growth phases on the strength of individual W303 yeast cells inside ESEM. Ahmad MR, Nakajima M, Kojima S, Homma M, Fukuda T. IEEE Trans Nanobioscience (2008) 7, 185-193.　

• Insights into the stator assembly of the Vibrio flagellar motor from the crystal structure of MotY. Kojima S, Shinohara A, Terashima H, Yakushi T, Sakuma M, Homma M, Namba K, Imada K. Proc. Natl. Acad. Sci. U. S. A. (2008) 105,7696-7701.

• *Characterization of the periplasmic domain of MotB and implications for its role in the stator assembly of the bacterial flagellar motor. Kojima S, Furukawa Y, Matsunami H, Minamino T, Namba K. J. Bacteriol. (2008) 190, 3314-3322.

• Collaboration of FlhF and FlhG to regulate polar-flagella number and localization in Vibrio alginolyticus. Kusumoto A, Shinohara A, Terashima H, Kojima S, Yakushi T, Homma M. Microbiology (2008) 154, 1390-1399.

• Roles of charged residues in the C-terminal region of PomA, a stator component of the Na+-driven flagellar motor. Obara M, Yakushi T, Kojima S, Homma M. J. Bacteriol. (2008) 190, 3565-3571.

• Systematic Cys mutagenesis of FlgI, the flagellar P-ring component of Escherichia coli. Hizukuri Y, Kojima S, Yakushi T, Kawagishi I, Homma M. Microbiology (2008) 154, 810-817.

2007　

• Visualization of functional rotor proteins of the bacterial flagellar motor in the cell membrane. Fukuoka H, Sowa Y, Kojima S, Ishijima A, Homma M. J. Mol. Biol. (2007) 367, 692-701.

• Crystallization and preliminary X-ray analysis of MotY, a stator component of the Vibrio alginolyticus polar flagellar motor. Shinohara A, Sakuma M, Yakushi T, Kojima S, Namba K, Homma M, Imada K. Acta. Cryst. (2007) 63(2), 89-92.

2006

The Vibrio motor proteins, MotX and MotY, are associated with the basal body of Na-driven flagella and required for stator formation. Terashima H, Fukuoka H, Yakushi T, Kojima S, Homma M. Mol. Microbiol. (2006) 62, 1170-1180.

2004

• Solubilization and purification of the MotA/MotB complex of Escherichia coli. Kojima S, Blair D.F. Biochemistry (2004) 43, 26-34.

• Arrangement of core membrane segments in the MotA/MotB proton-channel complex of Escherichia coli. Braun TF, Al-Mawsawi LQ, Kojima S, Blair DF. Biochemistry (2004) 43, 35-45.

2001

Conformational change in the stator of the bacterial flagellar motor. Kojima S, Blair D.F. Biochemistry (2001) 40, 13041-13050.

2000

A slow-motility phenotype caused by substitutions at residue Asp31 in the PomA channel component of a sodium-driven flagellar motor. Kojima S, Shoji T, Asai Y, Kawagishi I, Homma M. J. Bacteriol. (2000) 182, 3314-3318.

1999

• Random mutagenesis of the pomA gene encoding a putative channel component of the Na+-driven polar flagellar motor of Vibrio alginolyticus. Kojima S, Kuroda M, Kawagishi I, Homma M. Microbiology (1999) 145, 1759-1767.

• The polar flagellar motor of Vibrio cholerae is driven by an Na+ motive force. Kojima S, Yamamoto K, Kawagishi I, Homma M. J. Bacteriol. (1999) 181, 1927-1930.

• Na+-driven flagellar motor resistant to phenamil, an amiloride analog, caused by mutations in putative channel components. Kojima S, Asai Y, Atsumi T, Kawagishi I, Homma M. J. Mol. Biol. (1999) 285, 1537-1547.

1997

• Putative channel components for the fast-rotating sodium-driven flagellar motor of a marine bacterium. Asai Y, Kojima S, Kato H, Nishioka N, Kawagishi I, Homma M. J. Bacteriol. (1997) 179, 5104-5110.

• Vibrio alginolyticus mutants resistant to phenamil, a specific inhibitor of the sodium-driven flagellar motor. Kojima S, Atsumi T, Muramoto K, Kudo S, Kawagishi I, Homma M. J. Mol. Biol. (1997) 265, 310-318.

1996

Chemotactic responses to an attractant and a repellent by the polar and lateral flagellar systems of Vibrio alginolyticus. Homma M, Oota H, Kojima S, Kawagishi I, Imae Y. Microbiology (1996) 142, 2777-2783.