Chloroplast SecA and Escherichia coli SecA Have Distinct Lipid and Signal Peptide Preferences

Author:

Sun Changqi1,Rusch Sharyn L.1,Kim Jinoh1,Kendall Debra A.1

Affiliation:

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

Abstract

ABSTRACT 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.

Publisher

American Society for Microbiology

Subject

Molecular Biology,Microbiology

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