Protein import: the hitchhikers guide into chloroplasts.

Abstract:

:Plastids originated from an endosymbiotic event between an early eukaryotic host cell and an ancestor of today's cyanobacteria. During the events by which the engulfed endosymbiont was transformed into a permanent organelle, many genes were transferred from the plastidal genome to the nucleus of the host cell. Proteins encoded by these genes are synthesised in the cytosol and subsequently translocated into the plastid. Therefore they contain an N-terminal cleavable transit sequence that is necessary for translocation. The sequence is plastid-specific, thus preventing mistargeting into other organelles. Receptors embedded into the outer envelope of the plastid recognise the transit sequences, and precursor proteins are translocated into the chloroplast by a proteinaceous import machinery located in both the outer and inner envelopes. Inside the stroma the transit sequences are cleaved off and the proteins are further routed to their final locations within the plastid.

journal_name

Biol Chem

journal_title

Biological chemistry

authors

Vothknecht UC,Soll J

doi

10.1515/BC.2000.110

keywords:

subject

Has Abstract

pub_date

2000-09-01 00:00:00

pages

887-97

issue

9-10

eissn

1431-6730

issn

1437-4315

journal_volume

381

pub_type

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