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Journal of Bacteriology, October 2007, p. 7511-7514, Vol. 189, No. 20
0021-9193/07/$08.00+0 doi:10.1128/JB.00968-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.
Complex Formation by the mrpABCDEFG Gene Products, Which Constitute a Principal Na+/H+ Antiporter in Bacillus subtilis
Yusuke Kajiyama,1,2
Masato Otagiri,1
Junichi Sekiguchi,2
Saori Kosono,1* and
Toshiaki Kudo1,3
Environmental Molecular Biology Laboratory, Wako, Saitama,1
Department of Applied Biology, Shinshu University, Ueda,2
Graduate School of Integrated Science, Yokohama City University, Yokohama, Japan3
Received 19 June 2007/
Accepted 3 August 2007
The Bacillus subtilis Mrp (also referred to as Sha) is a particularly unusual Na+/H+ antiporter encoded by mrpABCDEFG. Using His tagging of Mrp proteins, we showed complex formation by the mrpABCDEFG gene products by pull-down and blue native polyacrylamide gel electrophoresis analyses. This is the first molecular evidence that the Mrp is a multicomponent antiporter in the cation-proton antiporter 3 family.
* Corresponding author. Mailing address: Environmental Molecular Biology Lab., RIKEN, Wako, Saitama 351-0198, Japan. Phone: 81-48-467-9545. Fax: 81-48-462-4672. E-mail:
kosono{at}riken.jp
Published ahead of print on 10 August 2007.
Journal of Bacteriology, October 2007, p. 7511-7514, Vol. 189, No. 20
0021-9193/07/$08.00+0 doi:10.1128/JB.00968-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.
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