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Journal of Bacteriology, February 2007, p. 1171-1175, Vol. 189, No. 3
0021-9193/07/$08.00+0     doi:10.1128/JB.01589-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

Chloroplast SecA and Escherichia coli SecA Have Distinct Lipid and Signal Peptide Preferences{triangledown}

Changqi Sun,{dagger} Sharyn L. Rusch, Jinoh Kim,{ddagger} and Debra A. Kendall*

Department of Molecular and Cell Biology, University of Connecticut, Storrs, Connecticut 06269-3125

Received 12 October 2006/ Accepted 20 November 2006

Like prokaryotic Sec-dependent protein transport, chloroplasts utilize SecA. However, we observe distinctive requirements for the stimulation of chloroplast SecA ATPase activity; it is optimally stimulated in the presence of galactolipid and only a small fraction of anionic lipid and by Sec-dependent thylakoid signal peptides but not Escherichia coli signal peptides.

* Corresponding author. Mailing address: University of Connecticut, 91 N. Eagleville Road, Storrs, CT 06269-3125. Fax: (860) 486-4331. E-mail: debra.kendall{at}uconn.edu.

{triangledown} Published ahead of print on 1 December 2006.

{dagger} Present address: Division of Biology and Medicine, Brown University, Providence, RI 02912.

{ddagger} Present address: Howard Hughes Medical Institute, Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720.

Journal of Bacteriology, February 2007, p. 1171-1175, Vol. 189, No. 3
0021-9193/07/$08.00+0     doi:10.1128/JB.01589-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

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