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Interaction of trigger factor with the ribosome

Title data

Maier, Raimund ; Eckert, Barbara ; Scholz, Christian ; Lilie, Hauke ; Schmid, Franz X.:
Interaction of trigger factor with the ribosome.
In: Journal of Molecular Biology. Vol. 326 (14 February 2003) Issue 2 . - pp. 585-592.
ISSN 0022-2836
DOI: https://doi.org/10.1016/S0022-2836(02)01427-4

Abstract in another language

The trigger factor of Escherichia coli is a prolyl isomerase and a chaperone. It interacts with the ribosome and affects the folding of newly formed protein chains. Therefore, the dynamics of the interactions of trigger factor with the ribosome and with unfolded protein chains should be tailored for this function. Previously, we had found that binding of unfolded proteins to trigger factor is fast and that the lifetime of the complex between these two components is only about 100 ms. Here, we have labeled the trigger factor in its amino-terminal, ribosome-binding domain with a fluorescent dye and investigated how it interacts with the ribosome. We found that this association, as well as the dissociation of the complex, are rather slow processes. The average lifetime of the complex is about 30 seconds (at 20 degrees C). The strong differences in the dynamics of the interactions of trigger factor with the ribosome and with protein substrates might ensure that, on the one hand, trigger factor remains bound to the ribosome while a protein chain is being synthesized, and, on the other hand, allows it to scan the newly formed protein for prolyl bonds that need catalysis of isomerization.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: PubMed-ID: 12559924
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors > Professorship Biochemistry - Univ.-Prof. Dr. Franz Xaver Schmid
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Professorship Biochemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 20 May 2015 09:22
Last Modified: 20 May 2015 09:22
URI: https://eref.uni-bayreuth.de/id/eprint/13933