ArticlePlant molecular biology2005
Protein import pathways in 'complex' chloroplasts derived from secondary endosymbiosis involving a red algal ancestor.
Article in Plant molecular biology, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 24 citations in OpenAlex.
- The Rice BZ1 Locus Is Required for Glycosylation of Arabinogalactan Proteins and Galactolipid and Plays a Role in both Mechanical Strength and Leaf Color.Rice (New York, N.Y.) · 2020Article
- Kingdom Chromista and its eight phyla: a new synthesis emphasising periplastid protein targeting, cytoskeletal and periplastid evolution, and ancient divergences.Protoplasma · 2018Article
- Mitochondrial genomes are retained by selective constraints on protein targeting.Proceedings of the National Academy of Sciences of the United States of America · 2015Article
- The mitochondrial and chloroplast genomes of the haptophyte Chrysochromulina tobin contain unique repeat structures and gene profiles.BMC genomics · 2014Article
- Proteomic amino-termini profiling reveals targeting information for protein import into complex plastids.PloS one · 2013Article
- Horizontal gene transfer of the algal nuclear gene psbO to the photosynthetic sea slug Elysia chlorotica.Proceedings of the National Academy of Sciences of the United States of America · 2008Article
- Surviving the passage: Non-canonical stromal targeting of an Arabidopsis mitogen-activated protein kinase kinase.Plant signaling & behavior · 2008Article
- Protein targeting into complex diatom plastids: functional characterisation of a specific targeting motif.Plant molecular biology · 2007Article
- Chloroplast His-to-Asp signal transduction: a potential mechanism for plastid gene regulation in Heterosigma akashiwo (Raphidophyceae).BMC evolutionary biology · 2007Article
- Protein targeting into the complex plastid of cryptophytes.Journal of molecular evolution · 2006Article
- Protein targeting into plastids: a key to understanding the symbiogenetic acquisitions of plastids.Journal of plant research · 2005Review
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Heterokont algae such as diatoms and the raphidophyte Heterosigma akashiwo and peridinin-containing dinoflagellates such as Heterocapsa triquetra originally acquired their chloroplasts via secondary endosymbiosis involving a red algal endosymbiont and a eukaryote host, resulting in 'complex' chloroplasts surrounded by four and three membranes, respectively. The precursors of both heterokont and dinoflagellate chloroplast-targeted proteins are first inserted into the ER with removal of an N-terminal signal peptide, but how they traverse the remaining membranes is unclear. Using a nuclear-encoded thylakoid lumen protein, PsbO, from the heterokont alga Heterosigma akashiwo, the dinoflagellate Heterocapsa triquetra and the red alga Porphyra yezoensis we show that precursors without the ER signal peptide can be imported into pea chloroplasts. In the case of the H. triquetra and Porphyra PsbO, the precursors were processed to their predicted mature size and localized within the thylakoid lumen, using the Sec-dependent pathway. We report for the first time a stromal processing peptidase (SPP) activity from an alga of the red lineage. The enzyme processes the Heterosigma PsbO precursor at a single site and appears to have different substrate and reaction specificities from the plant SPP. In spite of the fact that we could not find convincing homologs of the plant chloroplast import machinery in heterokont (diatom) and red algal genomes, it is clear that these three very different lines of algae use similar mechanisms to import chloroplast precursors.
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