Nickel and GTP Modulate Helicobacter pylori UreG Structural Flexibility - Archive ouverte HAL Access content directly
Journal Articles Biomolecules Year : 2020

Nickel and GTP Modulate Helicobacter pylori UreG Structural Flexibility

Abstract

UreG is a P-loop GTP hydrolase involved in the maturation of nickel-containing urease, an essential enzyme found in plants, fungi, bacteria, and archaea. This protein couples the hydrolysis of GTP to the delivery of Ni(II) into the active site of apo-urease, interacting with other urease chaperones in a multi-protein complex necessary for enzyme activation. Whereas the conformation of Helicobacter pylori (Hp) UreG was solved by crystallography when it is in complex with two other chaperones, in solution the protein was found in a disordered and flexible form, defining it as an intrinsically disordered enzyme and indicating that the well-folded structure found in the crystal state does not fully reflect the behavior of the protein in solution. Here, isothermal titration calorimetry and site-directed spin labeling coupled to electron paramagnetic spectroscopy were successfully combined to investigate HpUreG structural dynamics in solution and the effect of Ni(II) and GTP on protein mobility. The results demonstrate that, although the protein maintains a flexible behavior in the metal and nucleotide bound forms, concomitant addition of Ni(II) and GTP exerts a structural change through the crosstalk of different protein regions.
Fichier principal
Vignette du fichier
biomolecules-HAL.pdf (1.91 Mo) Télécharger le fichier
Origin Publisher files allowed on an open archive
Loading...

Dates and versions

hal-02902916 , version 1 (20-07-2020)

Identifiers

Cite

Annalisa Pierro, Emilien Etienne, Guillaume Gerbaud, Bruno Guigliarelli, Stefano Ciurli, et al.. Nickel and GTP Modulate Helicobacter pylori UreG Structural Flexibility. Biomolecules, 2020, 10 (7), pp.1062. ⟨10.3390/biom10071062⟩. ⟨hal-02902916⟩

Collections

CNRS UNIV-AMU ANR
35 View
48 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More