Related ArticlesHigh-resolution NMR of encapsulated proteins dissolved in low-viscosity fluids.
Proc Natl Acad Sci U S A. 1998 Dec 22;95(26):15299-302
Authors: Wand AJ, Ehrhardt MR, Flynn PF
The majority of known proteins are too large to be comprehensively examined by solution NMR methods, primarily because they tumble too slowly in solution. Here we introduce an approach to making the NMR relaxation properties of large proteins amenable to modern solution NMR techniques. The encapsulation of a protein in a reverse micelle dissolved in a low-viscosity fluid allows it to tumble as fast as a much smaller protein. The approach is demonstrated and validated with the protein ubiquitin encapsulated in reverse micelles prepared in a variety of alkane solvents.
High dimensional and high resolution pulse sequences for backbone resonance assignment of intrinsically disordered proteins
High dimensional and high resolution pulse sequences for backbone resonance assignment of intrinsically disordered proteins
Abstract Four novel 5D (HACA(N)CONH, HNCOCACB, (HACA)CON(CA)CONH, (H)NCO(NCA)CONH), and one 6D ((H)NCO(N)CACONH) NMR pulse sequences are proposed. The new experiments employ non-uniform sampling that enables achieving high resolution in indirectly detected dimensions. The experiments facilitate resonance assignment of intrinsically disordered proteins. The novel pulse sequences were successfully tested using δ subunit (20 kDa) of Bacillus subtilis RNA polymerase...
nmrlearner
Journal club
0
02-21-2012 03:40 AM
Optimization of NMR spectroscopy of encapsulated proteins dissolved in low viscosity fluids
Optimization of NMR spectroscopy of encapsulated proteins dissolved in low viscosity fluids
Abstract Comprehensive application of solution NMR spectroscopy to studies of macromolecules remains fundamentally limited by the molecular rotational correlation time. For proteins, molecules larger than 30 kDa require complex experimental methods, such as TROSY in conjunction with isotopic labeling schemes that are often expensive and generally reduce the potential information available. We have developed the reverse micelle encapsulation strategy as an alternative approach. Encapsulation of...
nmrlearner
Journal club
0
07-15-2011 09:10 PM
Optimization of NMR spectroscopy of encapsulated proteins dissolved in low viscosity fluids.
Optimization of NMR spectroscopy of encapsulated proteins dissolved in low viscosity fluids.
Optimization of NMR spectroscopy of encapsulated proteins dissolved in low viscosity fluids.
J Biomol NMR. 2011 Jul 12;
Authors: Nucci NV, Marques BS, Bédard S, Dogan J, Gledhill JM, Moorman VR, Peterson RW, Valentine KG, Wand AL, Wand AJ
Comprehensive application of solution NMR spectroscopy to studies of macromolecules remains fundamentally limited by the molecular rotational correlation time. For proteins, molecules larger than 30*kDa require complex...
nmrlearner
Journal club
0
07-13-2011 06:42 PM
High resolution NMR spectroscopy of nanocrystalline proteins at ultra-high magnetic field
High resolution NMR spectroscopy of nanocrystalline proteins at ultra-high magnetic field
Abstract Magic-angle spinning (MAS) solid-state NMR (SSNMR) spectroscopy of uniformly-13C,15N labeled protein samples provides insight into atomic-resolution chemistry and structure. Data collection efficiency has advanced remarkably in the last decade; however, the study of larger proteins is still challenged by relatively low resolution in comparison to solution NMR. In this study, we present a systematic analysis of SSNMR protein spectra acquired at 11.7, 17.6 and 21.1 Tesla (1H frequencies of...
nmrlearner
Journal club
0
01-09-2011 12:46 PM
[NMR paper] Novel surfactant mixtures for NMR spectroscopy of encapsulated proteins dissolved in low-viscosity fluids.
Novel surfactant mixtures for NMR spectroscopy of encapsulated proteins dissolved in low-viscosity fluids.
Related Articles Novel surfactant mixtures for NMR spectroscopy of encapsulated proteins dissolved in low-viscosity fluids.
Protein Sci. 2005 Nov;14(11):2919-21
Authors: Peterson RW, Pometun MS, Shi Z, Wand AJ
NMR spectroscopy of encapsulated proteins dissolved in low-viscosity fluids is emerging as a tool for biophysical studies of proteins in atomic detail in a variety of otherwise inaccessible contexts. The central element of the...
nmrlearner
Journal club
0
12-01-2010 06:56 PM
[NMR paper] High-resolution NMR studies of encapsulated proteins in liquid ethane.
High-resolution NMR studies of encapsulated proteins in liquid ethane.
High-resolution NMR studies of encapsulated proteins in liquid ethane.
J Am Chem Soc. 2005 Jul 27;127(29):10176-7
Authors: Peterson RW, Lefebvre BG, Wand AJ
Many of the difficulties presented by large, aggregation-prone, and membrane proteins to modern solution NMR spectroscopy can be alleviated by actively seeking to increase the effective rate of molecular reorientation. An emerging approach involves encapsulating the protein of interest within the protective shell of a...
nmrlearner
Journal club
0
12-01-2010 06:56 PM
[NMR paper] High-resolution NMR spectroscopy of membrane proteins in aligned bicelles.
High-resolution NMR spectroscopy of membrane proteins in aligned bicelles.
Related Articles High-resolution NMR spectroscopy of membrane proteins in aligned bicelles.
J Am Chem Soc. 2004 Dec 1;126(47):15340-1
Authors: De Angelis AA, Nevzorov AA, Park SH, Howell SC, Mrse AA, Opella SJ
High-resolution solid-state NMR spectra can be obtained from uniformly (15)N-labeled membrane proteins in magnetically aligned bicelles. Fast uniaxial diffusion about the axis of the bilayer normal results in single-line spectra that contain the orientational...
nmrlearner
Journal club
0
11-24-2010 10:03 PM
[NMR paper] A simple and effective NMR cell for studies of encapsulated proteins dissolved in low
A simple and effective NMR cell for studies of encapsulated proteins dissolved in low viscosity solvents.
Related Articles A simple and effective NMR cell for studies of encapsulated proteins dissolved in low viscosity solvents.
J Biomol NMR. 2002 Aug;23(4):311-6
Authors: Flynn PF, Milton MJ, Babu CR, Wand AJ
Application of triple-resonance and isotope-edited-NOE methods to the study of increasingly larger macromolecules and their complexes remains a central goal of solution NMR spectroscopy. The slow reorientational motion of larger molecules...