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Energetic communication between functional sites of the gene-3-protein during infection by phage fd

Titelangaben

Hoffmann-Thoms, Stephanie ; Jakob, Roman P. ; Schmid, Franz X.:
Energetic communication between functional sites of the gene-3-protein during infection by phage fd.
In: Journal of Molecular Biology. Bd. 426 (2014) Heft 8 . - S. 1711-1722.
ISSN 0022-2836
DOI: https://doi.org/10.1016/j.jmb.2014.01.002

Abstract

To initiate infection of Escherichia coli, phage fd uses its gene-3-protein (G3P) to bind first to an F pilus and then to the TolA protein at the cell surface. G3P is normally auto-inhibited because a tight interaction between the two N-terminal domains N1 and N2 buries the TolA binding site. Binding of N2 to the pilus activates G3P by initiating long-range conformational changes that are relayed to the domain interface and to a proline timer. We discovered that the 23-28 loop of the N1 domain is critical for propagating these conformational signals. The analysis of the stability and the folding dynamics of G3P variants with a shortened loop combined with TolA interaction studies and phage infection experiments reveal how the contact between the N2 domain and the 23-28 loop of N1 is energetically linked with the interdomain region and the proline timer and how it affects phage infectivity. Our results illustrate how conformational transitions and prolyl cis/trans isomerization can be coupled energetically and how conformational signals to and from prolines can be propagated over long distances in proteins.

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Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: PubMed-ID: 24440124
Institutionen der Universität: Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Ehemalige Professoren > Professur Biochemie - Univ.-Prof. Dr. Franz Xaver Schmid
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Professur Biochemie
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Ehemalige Professoren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
Eingestellt am: 21 Apr 2015 13:31
Letzte Änderung: 11 Jul 2022 13:25
URI: https://eref.uni-bayreuth.de/id/eprint/10475