Evidence from solid-state NMR for nonhelical conformations in the transmembrane domain of the amyloid precursor protein.
Biophys J. 2011 Feb 2;100(3):711-9
Authors: Lu JX, Yau WM, Tycko R
The amyloid precursor protein (APP) is subject to proteolytic processing by ?-secretase within neuronal membranes, leading to Alzheimer's disease-associated ?-amyloid peptide production by cleavage near the midpoint of the*single transmembrane (TM) segment of APP. Conformational properties of the TM segment may affect its susceptibility to ?-secretase cleavage, but these properties have not been established definitively, especially in bilayer membranes with physiologically relevant lipid compositions. In this article, we report an investigation of the APP-TM conformation, using (13)C chemical shifts obtained with two-dimensional solid-state NMR spectroscopy as site-specific conformational probes. We find that the*APP-TM conformation is not a simple ?-helix, particularly at 37°C in multilamellar vesicles with compositions that mimic the composition of neuronal cell membranes. Instead, we observe a mixture of helical and nonhelical conformations at the N-*and C-termini and in the vicinity of the ?-cleavage site. Conformational plasticity of the TM segment of APP may be an important factor in the ?-secretase cleavage mechanism.
Revealing Protein Structures in Solid-Phase Peptide Synthesis by 13C Solid-State NMR: Evidence of Excessive Misfolding for Alzheimer’s ?
Revealing Protein Structures in Solid-Phase Peptide Synthesis by 13C Solid-State NMR: Evidence of Excessive Misfolding for Alzheimer’s ?
Songlin Wang and Yoshitaka Ishii
http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/0/jacsat.ahead-of-print/ja212190z/aop/images/medium/ja-2011-12190z_0002.gif
Journal of the American Chemical Society
DOI: 10.1021/ja212190z
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http://feeds.feedburner.com/~r/acs/jacsat/~4/6EE7uthrnLg
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01-31-2012 08:34 PM
Proton-Detected Solid-State NMR Reveals Intramembrane Polar Networks in a Seven-Helical Transmembrane Protein Proteorhodopsin
Proton-Detected Solid-State NMR Reveals Intramembrane Polar Networks in a Seven-Helical Transmembrane Protein Proteorhodopsin
Meaghan E. Ward, Lichi Shi, Evelyn Lake, Sridevi Krishnamurthy, Howard Hutchins, Leonid S. Brown and Vladimir Ladizhansky
http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/0/jacsat.ahead-of-print/ja207137h/aop/images/medium/ja-2011-07137h_0008.gif
Journal of the American Chemical Society
DOI: 10.1021/ja207137h
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10-09-2011 06:15 AM
Solid-state NMR analysis of interaction sites of curcumin and 42-residue amyloid ?-protein fibrils.
Solid-state NMR analysis of interaction sites of curcumin and 42-residue amyloid ?-protein fibrils.
Solid-state NMR analysis of interaction sites of curcumin and 42-residue amyloid ?-protein fibrils.
Bioorg Med Chem. 2011 Aug 27;
Authors: Masuda Y, Fukuchi M, Yatagawa T, Tada M, Takeda K, Irie K, Akagi KI, Monobe Y, Imazawa T, Takegoshi K
Abstract
Aggregation of 42-residue amyloid ?-protein (A?42) plays a pivotal role in the etiology of Alzheimer's disease (AD). Curcumin, the yellow pigment in the rhizome of turmeric, attracts...
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09-20-2011 03:10 PM
Proton Detected Solid-State NMR Reveals Intramembrane Polar Networks in a Seven-Helical Transmembrane Protein Proteorhodopsin.
Proton Detected Solid-State NMR Reveals Intramembrane Polar Networks in a Seven-Helical Transmembrane Protein Proteorhodopsin.
Proton Detected Solid-State NMR Reveals Intramembrane Polar Networks in a Seven-Helical Transmembrane Protein Proteorhodopsin.
J Am Chem Soc. 2011 Sep 16;
Authors: Ward ME, Shi L, Lake EM, Krishnamurthy S, Hutchins H, Brown LS, Ladizhansky V
Abstract
We used high-resolution proton-detected multidimensional NMR to study the solvent-exposed parts of an integral seven-helical membrane proton pump proteorhodopsin...
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09-17-2011 08:21 PM
Expression, purification, and reconstitution of the transmembrane domain of the human amyloid precursor protein for NMR studies.
Expression, purification, and reconstitution of the transmembrane domain of the human amyloid precursor protein for NMR studies.
Expression, purification, and reconstitution of the transmembrane domain of the human amyloid precursor protein for NMR studies.
Protein Expr Purif. 2011 Aug 31;
Authors: Chen W, Gamache E, Richardson D, Du Z, Wang C
Abstract
Alzheimer's disease (AD) is the most common type of dementia in elderly people. Senile plaques, a pathologic hallmark of AD, are composed of amyloid ? peptide (A?). A? aggregation produces...
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09-13-2011 08:27 PM
[NMR paper] 15N and 31P solid-state NMR study of transmembrane domain alignment of M2 protein of
15N and 31P solid-state NMR study of transmembrane domain alignment of M2 protein of influenza A virus in hydrated cylindrical lipid bilayers confined to anodic aluminum oxide nanopores.
Related Articles 15N and 31P solid-state NMR study of transmembrane domain alignment of M2 protein of influenza A virus in hydrated cylindrical lipid bilayers confined to anodic aluminum oxide nanopores.
J Magn Reson. 2005 Apr;173(2):322-7
Authors: Chekmenev EY, Hu J, Gor'kov PL, Brey WW, Cross TA, Ruuge A, Smirnov AI
This communication reports the first...
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11-25-2010 08:21 PM
[NMR paper] Phosphorylation-induced structural changes in the amyloid precursor protein cytoplasm
Phosphorylation-induced structural changes in the amyloid precursor protein cytoplasmic tail detected by NMR.
Related Articles Phosphorylation-induced structural changes in the amyloid precursor protein cytoplasmic tail detected by NMR.
J Mol Biol. 2001 Mar 30;307(3):871-84
Authors: Ramelot TA, Nicholson LK
The cytoplasmic tail of the amyloid precursor protein (APPc) interacts with several cellular factors implicated in intracellular signaling or proteolytic production of amyloid beta peptide found in senile plaques of Alzheimer's disease...
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11-19-2010 08:32 PM
[NMR paper] Transmembrane domain of M2 protein from influenza A virus studied by solid-state (15)
Transmembrane domain of M2 protein from influenza A virus studied by solid-state (15)N polarization inversion spin exchange at magic angle NMR.
Related Articles Transmembrane domain of M2 protein from influenza A virus studied by solid-state (15)N polarization inversion spin exchange at magic angle NMR.
Biophys J. 2000 Aug;79(2):767-75
Authors: Song Z, Kovacs FA, Wang J, Denny JK, Shekar SC, Quine JR, Cross TA
The M2 protein from the influenza A virus forms a proton channel in the virion that is essential for infection. This tetrameric protein...
Evidence from solid-state NMR for nonhelical conformations in the transmembrane domain of the amyloid precursor protein.
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