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Default Secondary structure, dynamics, and architecture of the p7 membrane protein from hepat

Secondary structure, dynamics, and architecture of the p7 membrane protein from hepatitis c virus by NMR spectroscopy.

Related Articles Secondary structure, dynamics, and architecture of the p7 membrane protein from hepatitis c virus by NMR spectroscopy.

Biochim Biophys Acta. 2010 Aug 18;

Authors: Cook GA, Opella SJ

P7 is a small membrane protein that is essential for the infectivity of hepatitis C virus. Solution-state NMR experiments on p7 in DHPC micelles, including hydrogen/deuterium exchange, paramagnetic relaxation enhancement and bicelle 'q-titration'; demonstrate that the protein has a range of dynamic properties and distinct structural segments. These data along with residual dipolar couplings yield a secondary structure model of p7. We were able to confirm previous proposals that the protein has two transmembrane segments with a short interhelical loop containing the two basic residues K33 and R35. The 63-amino acid protein has a remarkably complex structure made up of 7 identifiable sections, four of which are helical segments with different tilt angles and dynamics. A solid-state NMR two-dimensional separated local field spectrum of p7 aligned in phospholipid bilayers provided the tilt angles of two of these segments. A preliminary structural model of p7 derived from these NMR data is presented.

PMID: 20727850 [PubMed - as supplied by publisher]



Source: PubMed
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