Related ArticlesRepresenting an ensemble of NMR-derived protein structures by a single structure.
Protein Sci. 1993 Jun;2(6):936-44
Authors: Sutcliffe MJ
The usefulness of representing an ensemble of NMR-derived protein structures by a single structure has been investigated. Two stereochemical properties have been used to assess how a single structure relates to the ensemble from which it was derived, namely the distribution of phi psi torsion angles and the distribution of chi 1 torsion angles. The results show that the minimized average structure derived from the ensemble (a total of 11 ensembles from the Brookhaven Protein Data Bank were analyzed) does not always correspond well with this ensemble, particularly for those ensembles generated with a smaller number of experimentally derived restraints per residue. An alternative method that selects the member of the ensemble which is closest to the "average" of the ensemble has been investigated (a total of 23 ensembles from the Brookhaven Protein Data Bank were analyzed). Although this method selected a structure that on the whole corresponded more closely to the ensemble than did the minimized average structure, this is still not a totally reliable means of selecting a single structure to represent the ensemble. This suggests that it is advisable to study the ensemble as a whole. A study has also been made of the practice of selecting the "best" rather than the most representative member of the ensemble. This too suggests that the ensemble should be studied as a whole. A study of the conformational space occupied by the ensemble also suggests the need to consider the ensemble as a whole, particularly for those ensembles generated with a smaller number of experimentally derived restraints per residue.
Simultaneous single-structure and bundle representation of protein NMR structures in torsion angle space
Simultaneous single-structure and bundle representation of protein NMR structures in torsion angle space
Abstract A method is introduced to represent an ensemble of conformers of a protein by a single structure in torsion angle space that lies closest to the averaged Cartesian coordinates while maintaining perfect covalent geometry and on average equal steric quality and an equally good fit to the experimental (e.g. NMR) data as the individual conformers of the ensemble. The single representative â??regmean structureâ?? is obtained by simulated annealing in torsion angle space with the...
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[NMR paper] NMR structures of three single-residue variants of the human prion protein.
NMR structures of three single-residue variants of the human prion protein.
Related Articles NMR structures of three single-residue variants of the human prion protein.
Proc Natl Acad Sci U S A. 2000 Jul 18;97(15):8340-5
Authors: Calzolai L, Lysek DA, Guntert P, von Schroetter C, Riek R, Zahn R, Wüthrich K
The NMR structures of three single-amino acid variants of the C-terminal domain of the human prion protein, hPrP(121-230), are presented. In hPrP(M166V) and hPrP(R220K) the substitution is with the corresponding residue in murine PrP, and in...
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11-19-2010 08:29 PM
CoNSEnsX: an ensemble view of protein structures and NMR-derived experimental data.
CoNSEnsX: an ensemble view of protein structures and NMR-derived experimental data.
Related Articles CoNSEnsX: an ensemble view of protein structures and NMR-derived experimental data.
BMC Struct Biol. 2010 Oct 29;10(1):39
Authors: Angyan AF, Szappanos B, Perczel A, Gaspari Z
ABSTRACT: BACKGROUND: In conjunction with the recognition of the functional role of internal dynamics of proteins at various timescales, there is an emerging use of dynamic structural ensembles instead of individual conformers. These ensembles are usually substantially...
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11-03-2010 10:44 AM
CoNSEnsX: an ensemble view of protein structures and NMR-derived experimental data -
CoNSEnsX: an ensemble view of protein structures and NMR-derived experimental data - 7thSpace Interactive (press release)
<img alt="" height="1" width="1" />
CoNSEnsX: an ensemble view of protein structures and NMR-derived experimental data
7thSpace Interactive (press release)
These ensembles are usually substantially more diverse than conventional NMR ensembles and eliminate the expectation that a single conformer should fulfill ...
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10-29-2010 09:32 PM
[NMR paper] An automated approach for clustering an ensemble of NMR-derived protein structures in
An automated approach for clustering an ensemble of NMR-derived protein structures into conformationally related subfamilies.
Related Articles An automated approach for clustering an ensemble of NMR-derived protein structures into conformationally related subfamilies.
Protein Eng. 1996 Nov;9(11):1063-5
Authors: Kelley LA, Gardner SP, Sutcliffe MJ
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08-22-2010 02:20 PM
[NMR paper] An approach to protein homology modelling based on an ensemble of NMR structures: app
An approach to protein homology modelling based on an ensemble of NMR structures: application to the Sox-5 HMG-box protein.
Related Articles An approach to protein homology modelling based on an ensemble of NMR structures: application to the Sox-5 HMG-box protein.
Protein Eng. 1995 Jul;8(7):615-25
Authors: Adzhubei AA, Laughton CA, Neidle S
A new approach has been developed to reduce multiple protein structures obtained from NMR structure analysis to a smaller number of representative structures which still reflect the structural diversity of...
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08-22-2010 03:41 AM
[NMR paper] Conformational analysis of protein structures derived from NMR data.
Conformational analysis of protein structures derived from NMR data.
Related Articles Conformational analysis of protein structures derived from NMR data.
Proteins. 1993 Nov;17(3):232-51
Authors: MacArthur MW, Thornton JM
A study is presented of the conformational characteristics of NMR-derived protein structures in the Protein Data Bank compared to X-ray structures. Both ensemble and energy-minimized average structures are analyzed. We have addressed the problem using the methods developed for crystal structures by examining the distribution...
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08-22-2010 03:01 AM
Validation of NMR-derived protein structures, Chris Spronk
Here's a good PowerPoint presentation by Chris Spronk (University of Nijmegen, The Netherlands) on the subject of validating NMR protein structure results (adapted by Jurgen F. Doreleijers - University of Wisconsin, Madison, USA)
http://tang.bmrb.wisc.edu/~jurgen/presents/Madison/Biochem%20801/NMR_validation_biochem801_2005.ppt
The presentation is very well-annotated, so be sure to adjust your view in PowerPoint so that you can see the notes.
Representing an ensemble of NMR-derived protein structures by a single structure.
Linear Mode
