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2013-05-13

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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/48184

Protein oligomers studied by solid-state NMR the case of the full-length nucleoid-associated protein histone-like nucleoid structuring protein

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Recurs relacionat

http://dx.doi.org/10.1111/febs.12297

Resum

Members of the histone-like nucleoid structuring protein (H-NS) family play roles both as architectural proteins and as modulators of gene expression in Gram-negative bacteria. The H-NS protein participates in modulatory processes that respond to environmental changes in osmolarity, pH, or temperature. H-NS oligomerization is essential for its activity. Structural models of different truncated forms are available. However, high-resolution structural details of full-length H-NS and its DNA-bound state have largely remained elusive. We report on progress in characterizing the biologically active H-NS oligomers with solid-state NMR. We compared uniformly ((13)C,(15)N)-labeled ssNMR preparations of the isolated N-terminal region (H-NS 1-47) and full-length H-NS (H-NS 1-137). In both cases, we obtained ssNMR spectra of good quality and characteristic of well-folded proteins. Analysis of the results of 2D and 3D (13)C-(13)C and (15)N-(13)C correlation experiments conducted at high magnetic field led to assignments of residues located in different topological regions of the free full-length H-NS. These findings confirm that the structure of the N-terminal dimerization domain is conserved in the oligomeric full-length protein. Small changes in the dimerization interface suggested by localized chemical shift variations between solution and solid-state spectra may be relevant for DNA recoginition.

Matèries

Cromatina, Histones, Proteïnes, Ressonància magnètica nuclear, ADN, Ciències de la salut, Oligòmers

Matèries (anglès)

Chromatin, Histones, Proteins, Nuclear magnetic resonance, DNA, Medical sciences, Oligomers

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Articles publicats en revistes (Química Inorgànica i Orgànica)
Publicacions de projectes de recerca finançats per la UE

Citació

RENAULT, Marie, et al. Protein oligomers studied by solid-state NMR the case of the full-length nucleoid-associated protein histone-like nucleoid structuring protein. The FEBS Journal. 2013. Vol. 280, num. 12, pags. 2916-2928. ISSN 1742-464X. [consulted: 13 of August of 2026]. Available at: https://hdl.handle.net/2445/48184

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