at Google ScholarTitle data
Tomar, Sushil Kumar ; Knauer, Stefan H. ; NandyMazumdar, Monali ; Rösch, Paul ; Artsimovitch, Irina:
Interdomain contacts control folding of transcription factor RfaH.
In: Nucleic Acids Research.
Vol. 41
(2013)
Issue 22
.
- pp. 10077-10085.
ISSN 1362-4962
DOI: https://doi.org/10.1093/nar/gkt779
Abstract in another language
Escherichia coli RfaH activates gene expression by tethering the elongating RNA polymerase to the ribosome. This bridging action requires a complete refolding of the RfaH C-terminal domain (CTD) from an α-helical hairpin, which binds to the N-terminal domain (NTD) in the free protein, to a β-barrel, which interacts with the ribosomal protein S10 following RfaH recruitment to its target operons. The CTD forms a β-barrel when expressed alone or proteolytically separated from the NTD, indicating that the α-helical state is trapped by the NTD, perhaps co-translationally. Alternatively, the interdomain contacts may be sufficient to drive the formation of the α-helical form. Here, we use functional and NMR analyses to show that the denatured RfaH refolds into the native state and that RfaH in which the order of the domains is reversed is fully functional in vitro and in vivo. Our results indicate that all information necessary to determine its fold is encoded within RfaH itself, whereas accessory factors or sequential folding of NTD and CTD during translation are dispensable. These findings suggest that universally conserved RfaH homologs may change folds to accommodate diverse interaction partners and that context-dependent protein refolding may be widespread in nature.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Institutions of the University: | Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors > Chair Biopolymers - Apl. Prof. Dr. Birgitta Wöhrl 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 > Chair Biochemistry with an Emphasis on Biophysical Chemistry 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 500 Science > 570 Life sciences, biology |
| Date Deposited: | 27 May 2019 08:54 |
| Last Modified: | 27 May 2019 08:54 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/49089 |