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FEBS Lett. 1998 Jul 24;431(3):339-42.

Targeting signals for a bacterial Sec-independent export system direct plant thylakoid import by the delta pH pathway.

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1
Centre for Metalloprotein Spectroscopy and Biology, University of East Anglia, Norwich, UK.

Abstract

Preproteins targeted to the Sec-independent protein transport systems of plant thylakoids and of bacteria both have unusual transfer peptides bearing a consensus twin-arginine motif. Possible mechanistic similarity between the two Sec-independent transport pathways was investigated by assessing the ability of bacterial twin-arginine transfer peptides to direct thylakoid import. High efficiency import was observed. This process was demonstrated to occur specifically via the Sec-independent deltapH pathway and to depend on an intact twin-arginine motif on the transfer peptide. These results provide strong evidence for the operation of mechanistically related Sec-independent protein transport pathways in chloroplasts and bacteria.

PMID:
9714538
DOI:
10.1016/s0014-5793(98)00790-x
[Indexed for MEDLINE]
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