Skip to Main content Skip to Navigation
Journal articles

Structural analysis of the HiPIP from the acidophilic bacteria: Acidithiobacillus ferrooxidans.

Abstract : Hip is a high-potential iron-sulfur protein (HiPIP) isolated from the acidophilic bacterium, Acidithiobacillus ferrooxidans. In the present work, a structural model of Hip suggests that the role of proline residues is essential to stabilize the protein folding at very low pH. The presence of an unusual disulfide bridge in Hip is demonstrated using mass spectrometry and nuclear magnetic resonance. This disulfide bridge is necessary to anchor the N-terminal extremity of the protein, but is not involved in the acid stability of Hip. The structural parameters correlated with the pH dependence of Hip redox potential are also analysed on the basis of this model. Given that the same structural features can enhance acidic stability and lead to elevated redox potentials, modulation of the redox potentials of electron carriers may be necessary to achieve electron transfer at very low pH.
Document type :
Journal articles
Complete list of metadatas

https://hal.archives-ouvertes.fr/hal-00475668
Contributor : Isabelle Morganti <>
Submitted on : Thursday, April 22, 2010 - 3:36:41 PM
Last modification on : Thursday, January 18, 2018 - 1:45:51 AM

Links full text

Identifiers

Collections

Citation

Matthieu Nouailler, Patrice Bruscella, Elisabeth Lojou, Régine Lebrun, Violaine Bonnefoy, et al.. Structural analysis of the HiPIP from the acidophilic bacteria: Acidithiobacillus ferrooxidans.. Extremophiles, Springer Verlag, 2006, 10 (3), pp.191-8. ⟨10.1007/s00792-005-0486-8⟩. ⟨hal-00475668⟩

Share

Metrics

Record views

131