Item type:Thesis, Open Access

ptOmp85 – ein Toc75-Homolog in der dritten Plastidenmembran von Phaeodactylum tricornutum

Thumbnail Image

Files

dlb.pdf (12.34 MB)

Date

2010-03-09

relationships.isAuthorOf

Publisher

Philipps-Universität Marburg
DOI

item.page.supervisor-of-thesis

Abstract

Chromalveolates are a diverse group of protists that include many ecologically and medically relevant organisms such as diatoms and apicomplexan parasites. They possess plastids generally surrounded by four membranes, which evolved by engulfment of a red alga. Today, most plastid proteins must be imported, but many aspects of protein import into complex plastids are still cryptic. In particular, how proteins cross the third outermost membrane has remained unexplained. We identified a protein in the third outermost membrane of the diatom Phaeodactylum tricornutum with properties comparable to those of the Omp85 family. We demonstrate that the targeting route of P. tricornutum Omp85 parallels that of the translocation channel of the outer envelope membrane of chloroplasts, Toc75. In addition, the electrophysiological properties are similar to those of the Omp85 proteins involved in protein translocation. This supports the hypothesis that P. tricornutum Omp85 is involved in precursor protein translocation, which would close a gap in the fundamental understanding of the evolutionary origin and function of protein import in secondary plastids.

Review

Metadata

Contributors
Supervisor:
Dates
Created: 2010Issued: 2010-03-09Updated: 2011-08-10
Faculty
Fachbereich Biologie
Language
ger
Data types
DoctoralThesis
Keywords
Protein importcomplex plastidschromalveolates
DFG-subjects
Proteintransport
DDC-Numbers
570
License
https://rightsstatements.org/vocab/InC-NC/1.0/
URI
https://open.uni-marburg.de/handle/10.17192/z2010.0092
show more
Bullmann, Lars (140688854): ptOmp85 – ein Toc75-Homolog in der dritten Plastidenmembran von Phaeodactylum tricornutum. : Philipps-Universität Marburg 2010-03-09. DOI: https://doi.org/10.17192/z2010.0092.

License

item.page.license.under-copyright
This item has been published with the following license: In Copyright