scholarly journals Protein Structure Elucidation from NMR Data with the Program Xplor-NIH

2017 ◽  
pp. 311-340 ◽  
Author(s):  
Guillermo A. Bermejo ◽  
Charles D. Schwieters
Keyword(s):  
Protein Structure ◽  
Structure Elucidation ◽  
Nmr Data

scholarly journals DP4-AI Automated NMR Data Analysis: Straight from Spectrometer to Structure

2020 ◽  
Author(s):  
Alexander Howarth ◽  
Kristaps Ermanis ◽  
Jonathan Goodman
Keyword(s):  
1H Nmr ◽  
Open Source Software ◽  
Processing Speed ◽  
Structure Elucidation ◽  
Structural Information ◽  
Fold Increase ◽  
Structural Uncertainty ◽  
Large Sets ◽  
Nmr Data ◽  
Objective Model

<div> <p>A robust system for automatic processing and assignment of raw 13C and 1H NMR data DP4-AI has been developed and integrated into our computational organic molecule structure elucidation workflow. Starting from a molecular structure with undefined stereochemistry or other structural uncertainty, this system allows for completely automated structure elucidation. Methods for NMR peak picking using objective model selection and algorithms for matching the calculated 13C and 1H NMR shifts to peaks in noisy experimental NMR data were developed. DP4-AI achieved a 60-fold increase in processing speed, and near-elimination of the need for scientist time, when rigorously evaluated used a challenging test set of molecules. DP4-AI represents a leap forward in NMR structure elucidation and a step-change in the functionality of DP4. It enables high-throughput analyses of databases and large sets of molecules, which were previously impossible, and paves the way for the discovery of new structural information through machine learning. This new functionality has been coupled with an intuitive GUI and is available as open-source software at https://github.com/KristapsE/DP4-AI.</p> </div> <br>

scholarly journals A branch and bound algorithm for protein structure refinement from sparse NMR data sets 1 1Edited by F. Cohen

1999 ◽  
Vol 285 (4) ◽  
pp. 1691-1710 ◽  
Author(s):  
Daron M. Standley ◽  
Volker A. Eyrich ◽  
Anthony K. Felts ◽  
Richard A. Friesner ◽  
Ann E. McDermott
Keyword(s):  
Protein Structure ◽  
Branch And Bound ◽  
Structure Refinement ◽  
Branch And Bound Algorithm ◽  
Data Sets ◽  
Protein Structure Refinement ◽  
Nmr Data

scholarly journals Protein structure prediction from inaccurate and sparse NMR data using an enhanced genetic algorithm

2019 ◽  
Vol 79 ◽  
pp. 6-15 ◽  
Author(s):  
Md. Lisul Islam ◽  
Swakkhar Shatabda ◽  
Mahmood A. Rashid ◽  
M.G.M. Khan ◽  
M. Sohel Rahman
Keyword(s):  
Genetic Algorithm ◽  
Protein Structure ◽  
Protein Structure Prediction ◽  
Structure Prediction ◽  
Nmr Data

scholarly journals DP4-Assisted Structure Elucidation of Isodemethylchodatin, a New Norlichexanthone Derivative Meager in H-Atoms, from the Lichen Parmotrema tsavoense

Molecules ◽  
2019 ◽  
Vol 24 (8) ◽  
pp. 1527 ◽  
Author(s):  
Thuc-Huy Duong ◽  
Mehdi A. Beniddir ◽  
Joël Boustie ◽  
Kim-Phi-Phung Nguyen ◽  
Warinthorn Chavasiri ◽  
...  
Keyword(s):  
Computational Chemistry ◽  
13C Nmr ◽  
Structure Elucidation ◽  
Methoxy Group ◽  
Chemical Shifts ◽  
13C Nmr Chemical Shifts ◽  
Nmr Data ◽  
Phytochemical Investigation ◽  
Integrated Interpretation ◽  
Foliose Lichen

A phytochemical investigation of the foliose lichen Parmotrema tsavoense (Krog and Swinscow) Krog and Swinscow (Parmeliaceae) resulted in the isolation of a new trichlorinated xanthone, isodemethylchodatin. The structure elucidation of this new norlichexanthone derivative proved tricky owing to proton deficiency, and to the lack of NMR data of closely related analogues. The structure of this compound was determined based on an integrated interpretation of 13C-NMR chemical shifts, MS spectra, and DP4-based computational chemistry was also performed to provide an independent and unambiguous validation of the determined structure. Isodemethylchodatin represents the first chlorinated lichexanthone/norlichexanthone derivative bearing a methoxy group at C-5.

Juglomycins G-J: Isolation from Streptomycetes and Structure Elucidation

2005 ◽  
Vol 60 (2) ◽  
pp. 183-188 ◽  
Author(s):  
R. P. Maskey ◽  
H. Lessmann ◽  
S. Fotso ◽  
I. Grün-Wollny ◽  
H. Lackner ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Absolute Configuration ◽  
Structure Elucidation ◽  
Mass Spectra ◽  
2D Nmr ◽  
Cd Spectra ◽  
Streptomyces Spp ◽  
Nmr Data ◽  
Related Compounds ◽  
Weak Antibacterial Activity

From the Streptomyces spp. 815 and GW4184, four new 4-juglon-2-ylbutyric acid derivatives, the juglomycins G - J (3a, 4a, 4c, 5c), have been isolated and characterised. The structures were derived from the 1D and 2D NMR data and mass spectra and confirmed by comparison with structurally related compounds. The absolute configuration was deduced from the CD spectra. The new natural products exhibited weak antibacterial activity similar to juglomycin A (5a).

Computer-assisted structure elucidation of natural products with limited 2D NMR data: application of the StrucEluc system

2003 ◽  
Vol 41 (5) ◽  
pp. 359-372 ◽  
Author(s):  
Kirill A. Blinov ◽  
Dean Carlson ◽  
Mikhail E. Elyashberg ◽  
Gary E. Martin ◽  
Eduard R. Martirosian ◽  
...  
Keyword(s):  
Natural Products ◽  
Structure Elucidation ◽  
2D Nmr ◽  
Computer Assisted ◽  
Nmr Data ◽  
Data Application ◽  
Computer Assisted Structure Elucidation
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