Related ArticlesAutomatic Assignment of Methyl-NMR Spectra of Supramolecular Machines Using Graph Theory.
J Am Chem Soc. 2017 Jul 10;:
Authors: Pritišanac I, Degiacomi MT, Alderson TR, Carneiro MG, Ab E, Siegal G, Baldwin AJ
Abstract
Methyl groups are powerful probes for the analysis of structure, dynamics and function of supramolecular assemblies, using both solution- and solid-state NMR. Widespread application of the methodology has been limited due to the challenges associated with assigning spectral resonances to specific locations within a biomolecule. Here, we present Methyl Assignment by Graph Matching (MAGMA), for the automatic assignment of methyl resonances. A graph matching protocol examines all possibilities for each resonance in order to determine an exact assignment that includes a complete description of any ambiguity. MAGMA gives 100% accuracy in confident assignments when tested against both synthetic data, and 9 cross-validated examples using both solution- and solid-state NMR data. We show that this remarkable accuracy enables a user to distinguish between alternative protein structures. In a drug discovery application on HSP90, we show the method can rapidly and efficiently distinguish between possible ligand binding modes. By providing an exact and robust solution to methyl resonance assignment, MAGMA can facilitate significantly accelerated studies of supramolecular machines using methyl-based NMR spectroscopy.
PMID: 28691806 [PubMed - as supplied by publisher]
Automatic Assignment of Methyl-NMR Spectra of Supramolecular Machines Using Graph Theory
Automatic Assignment of Methyl-NMR Spectra of Supramolecular Machines Using Graph Theory
Iva Pritis?anac, Matteo T. Degiacomi, T. Reid Alderson, Marta G. Carneiro, Eiso AB, Gregg Siegal and Andrew J. Baldwin
http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/0/jacsat.ahead-of-print/jacs.6b11358/20170710/images/medium/ja-2016-11358e_0008.gif
Journal of the American Chemical Society
DOI: 10.1021/jacs.6b11358
http://feeds.feedburner.com/~ff/acs/jacsat?d=yIl2AUoC8zA
http://feeds.feedburner.com/~r/acs/jacsat/~4/VuC8AlNsrfs
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[NMR paper] Bringing Dynamic Molecular Machines into Focus by Methyl-TROSY NMR.
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Authors: Rosenzweig R, Kay LE
Abstract
Large macromolecular assemblies, so-called molecular machines, are critical to ensuring proper cellular function. Understanding how proper function is achieved at the atomic level is crucial to advancing multiple avenues of biomedical research. Biophysical studies often include X-ray diffraction and...
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06-07-2014 07:12 PM
Journal Highlight: Automatic assignment of 1H-NMR spectra of small molecules
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http://www.spectroscopynow.com/common/images/thumbnails/1426b18dc06.jpgA novel data-evaluation procedure for the automatic atom to peak or multiplet assignment of 1H-NMR spectra of small molecules has been developed using a fast and robust expert system.
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Abstract While NMR studies of proteins typically aim at structure, dynamics or interactions, resonance assignments represent in almost all cases the initial step of the analysis. With increasing complexity of the NMR spectra, for example due to decreasing extent of ordered structure, this task often becomes both difficult and time-consuming, and the recording of high-dimensional data with high-resolution may be essential. Random sampling of the evolution time space,...
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07-20-2012 11:13 PM
Automated sequence- and stereo-specific assignment of methyl-labeled proteins by paramagnetic relaxation and methylâ??methyl nuclear overhauser enhancement spectroscopy
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Abstract Methyl-transverse relaxation optimized spectroscopy is rapidly becoming the preferred NMR technique for probing structure and dynamics of very large proteins up to ~1 MDa in molecular size. Data interpretation, however, necessitates assignment of methyl groups which still presents a very challenging and time-consuming process. Here we demonstrate that, in combination with a known 3D structure, paramagnetic...
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Authors: Bailey-Kellogg C, Chainraj S, Pandurangan G
Nuclear magnetic resonance (NMR) spectroscopy allows scientists to study protein structure, dynamics and interactions in solution. A necessary first step for such applications is determining the resonance assignment, mapping spectral data to atoms and residues in the primary sequence. Automated resonance assignment algorithms...
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Biopolymers. 1996 Nov;39(5):691-707
Authors: van Geerestein-Ujah EC, Mariani M, Vis H, Boelens R, Kaptein R
A computer-assisted procedure, based upon a branch of...
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J Biomol NMR. 1995 Jul;6(1):67-78
Authors: van Geerestein-Ujah EC, Slijper M, Boelens R, Kaptein R
A novel procedure is presented for the automatic identification of secondary structures in proteins from their corresponding NOE data. The method uses a branch...