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Valéry C, Deville-Foillard S, Lefebvre C, Taberner N, Legrand P, Meneau F, Meriadec C, Delvaux C, Bizien T, Kasotakis E, Lopez-Iglesias C, Gall A, Bressanelli S, Le Du MH, Paternostre M, Artzner F. Atomic view of the histidine environment stabilizing higher-pH conformations of pH-dependent proteins. Nat Commun 2015; 6:7771. [PMID: 26190377 PMCID: PMC4518280 DOI: 10.1038/ncomms8771] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 06/09/2015] [Indexed: 11/17/2022] Open
Abstract
External stimuli are powerful tools that naturally control protein assemblies and functions. For example, during viral entry and exit changes in pH are known to trigger large protein conformational changes. However, the molecular features stabilizing the higher pH structures remain unclear. Here we elucidate the conformational change of a self-assembling peptide that forms either small or large nanotubes dependent on the pH. The sub-angstrom high-pH peptide structure reveals a globular conformation stabilized through a strong histidine-serine H-bond and a tight histidine-aromatic packing. Lowering the pH induces histidine protonation, disrupts these interactions and triggers a large change to an extended β-sheet-based conformation. Re-visiting available structures of proteins with pH-dependent conformations reveals both histidine-containing aromatic pockets and histidine-serine proximity as key motifs in higher pH structures. The mechanism discovered in this study may thus be generally used by pH-dependent proteins and opens new prospects in the field of nanomaterials. In biological systems, large pH-induced conformational changes can be observed in certain proteins, a phenomenon poorly understood at the molecular level. Here the authors describe a peptide with the ability to self-organize into either small or large nanotubes in a pH-dependent manner and detail the mechanism driving the transition.
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Affiliation(s)
- Céline Valéry
- 1] Biomolecular Interaction Centre, School of Biological Sciences, University of Canterbury, 8140 Christchurch, New zealand [2] Ipsen, 5 Avenue du Canada, 91940 Les Ulis, France
| | - Stéphanie Deville-Foillard
- 1] Ipsen, 5 Avenue du Canada, 91940 Les Ulis, France [2] CEA, Institute of Biology and Technologies of Saclay, 91191 CEA-Saclay, France [3] Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, 91191 CEA-Saclay, Gif sur Yvette, France
| | - Christelle Lefebvre
- CNRS, UMR 6251, Institut de Physique de Rennes, 263 av. Général Leclerc, Université Rennes I, 35042 Rennes Cedex, France
| | | | | | | | - Cristelle Meriadec
- CNRS, UMR 6251, Institut de Physique de Rennes, 263 av. Général Leclerc, Université Rennes I, 35042 Rennes Cedex, France
| | - Camille Delvaux
- 1] CEA, Institute of Biology and Technologies of Saclay, 91191 CEA-Saclay, France [2] Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, 91191 CEA-Saclay, Gif sur Yvette, France
| | - Thomas Bizien
- CNRS, UMR 6251, Institut de Physique de Rennes, 263 av. Général Leclerc, Université Rennes I, 35042 Rennes Cedex, France
| | - Emmanouil Kasotakis
- 1] CEA, Institute of Biology and Technologies of Saclay, 91191 CEA-Saclay, France [2] Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, 91191 CEA-Saclay, Gif sur Yvette, France
| | - Carmen Lopez-Iglesias
- Cryo-Electron Microscopy Unit. Scientific and Tecnological Centers of the University of Barcelona, E-08028 Barcelona, Spain
| | - Andrew Gall
- 1] CEA, Institute of Biology and Technologies of Saclay, 91191 CEA-Saclay, France [2] Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, 91191 CEA-Saclay, Gif sur Yvette, France
| | - Stéphane Bressanelli
- 1] CEA, Institute of Biology and Technologies of Saclay, 91191 CEA-Saclay, France [2] Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, 91191 CEA-Saclay, Gif sur Yvette, France
| | - Marie-Hélène Le Du
- 1] CEA, Institute of Biology and Technologies of Saclay, 91191 CEA-Saclay, France [2] Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, 91191 CEA-Saclay, Gif sur Yvette, France
| | - Maïté Paternostre
- 1] CEA, Institute of Biology and Technologies of Saclay, 91191 CEA-Saclay, France [2] Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, 91191 CEA-Saclay, Gif sur Yvette, France
| | - Franck Artzner
- CNRS, UMR 6251, Institut de Physique de Rennes, 263 av. Général Leclerc, Université Rennes I, 35042 Rennes Cedex, France
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