Related ArticlesChemical proteomic tool for ligand mapping of CYP antitargets: an NMR-compatible 3D QSAR descriptor in the Heme-Based Coordinate System.
J Chem Inf Comput Sci. 2004 Jul-Aug;44(4):1456-65
Authors: Yao H, Costache AD, Sem DS
Chemical proteomic strategies strive to probe and understand protein-ligand interactions across gene families. One gene family of particular interest in drug and xenobiotic metabolism are the cytochromes P450 (CYPs), the topic of this article. Although numerous tools exist to probe affinity of CYP-ligand interactions, fewer exist for the rapid experimental characterization of the structural nature of these interactions. As a complement to recent advances in X-ray crystallography, NMR methods are being developed that allow for fairly high throughput characterization of protein-ligand interactions. One especially promising NMR approach involves the use of paramagnetic induced relaxation effects to measure distances of ligand atoms from the heme iron in CYP enzymes. Distances obtained from these T(1) relaxation measurements can be used as a direct source of 1-dimensional structural information or to restrain a ligand docking to generate a 3-dimensional data set. To facilitate such studies, we introduce the concept of the Heme-Based Coordinate System and present how it can be used in combination with NMR T(1) relaxation data to derive 3D QSAR descriptors directly or in combination with in silico docking. These descriptors should have application in defining the binding preferences of CYP binding sites using 3D QSAR models. They are especially well-suited for the biasing of fragment assembly and combinatorial chemistry drug design strategies, to avoid fragment or reagent combinations with enhanced affinity for CYP antitargets.
Protein-ligand docking guided by ligand pharmacophore-mapping experiment by NMR.
Protein-ligand docking guided by ligand pharmacophore-mapping experiment by NMR.
Protein-ligand docking guided by ligand pharmacophore-mapping experiment by NMR.
J Mol Graph Model. 2011 Sep 3;
Authors: Fukunishi Y, Mizukoshi Y, Takeuchi K, Shimada I, Takahashi H, Nakamura H
Abstract
We developed a new protein-ligand docking calculation method using experimental NMR data. Recently, we proposed a novel ligand epitope-mapping experiment, which utilizes the difference between the longitudinal relaxation rates of ligand protons with and...
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09-24-2011 04:11 PM
Mapping allostery through the covariance analysis of NMR chemical shifts.
Mapping allostery through the covariance analysis of NMR chemical shifts.
Mapping allostery through the covariance analysis of NMR chemical shifts.
Proc Natl Acad Sci U S A. 2011 Mar 28;
Authors: Selvaratnam R, Chowdhury S, Vanschouwen B, Melacini G
Allostery is a fundamental mechanism of regulation in biology. The residues at the end points of long-range allosteric perturbations are commonly identified by the comparative analyses of structures and dynamics in apo and effector-bound states. However, the networks of interactions mediating the...
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03-31-2011 06:24 PM
[NMR paper] Biochemical and NMR mapping of the interface between CREB-binding protein and ligand
Biochemical and NMR mapping of the interface between CREB-binding protein and ligand binding domains of nuclear receptor: beyond the LXXLL motif.
Related Articles Biochemical and NMR mapping of the interface between CREB-binding protein and ligand binding domains of nuclear receptor: beyond the LXXLL motif.
J Biol Chem. 2005 Feb 18;280(7):5682-92
Authors: Klein FA, Atkinson RA, Potier N, Moras D, Cavarelli J
CBP, cAMP-response element-binding protein (CREB)-binding protein, plays an important role as a general cointegrator of various signaling...
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11-24-2010 10:03 PM
[NMR paper] Epitope mapping of ligand-receptor interactions by diffusion NMR.
Epitope mapping of ligand-receptor interactions by diffusion NMR.
Related Articles Epitope mapping of ligand-receptor interactions by diffusion NMR.
J Am Chem Soc. 2002 Aug 28;124(34):9984-5
Authors: Yan J, Kline AD, Mo H, Zartler ER, Shapiro MJ
A novel method based on diffusion NMR for the epitope mapping of ligand binding is presented. The intermolecular NOE builds up during a long diffusion period and creates a deviation from the linearity. The ligand proton nearest the protein generates the strongest NOE from protein during the diffusion...
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11-24-2010 08:58 PM
[NMR paper] Spin labels as a tool to identify and characterize protein-ligand interactions by NMR
Spin labels as a tool to identify and characterize protein-ligand interactions by NMR spectroscopy.
Related Articles Spin labels as a tool to identify and characterize protein-ligand interactions by NMR spectroscopy.
Chembiochem. 2002 Mar 1;3(2-3):167-73
Authors: Jahnke W
NMR spectroscopy based discovery and optimization of lead compounds for a given molecular target requires the development of methods with maximum sensitivity and robustness. It is shown here that organic nitroxide radicals ("spin labels") can be used to boost the sensitivity...
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11-24-2010 08:49 PM
[NMR paper] NMR chemical shift mapping of the binding site of a protein proteinase inhibitor: cha
NMR chemical shift mapping of the binding site of a protein proteinase inhibitor: changes in the (1)H, (13)C and (15)N NMR chemical shifts of turkey ovomucoid third domain upon binding to bovine chymotrypsin A(alpha).
Related Articles NMR chemical shift mapping of the binding site of a protein proteinase inhibitor: changes in the (1)H, (13)C and (15)N NMR chemical shifts of turkey ovomucoid third domain upon binding to bovine chymotrypsin A(alpha).
J Mol Recognit. 2001 May-Jun;14(3):166-71
Authors: Song J, Markley JL
The substrate-like...
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11-19-2010 08:32 PM
[NMR paper] The inter-ligand Overhauser effect: a powerful new NMR approach for mapping structura
The inter-ligand Overhauser effect: a powerful new NMR approach for mapping structural relationships of macromolecular ligands.
Related Articles The inter-ligand Overhauser effect: a powerful new NMR approach for mapping structural relationships of macromolecular ligands.
J Biomol NMR. 1999 Sep;15(1):71-6
Authors: Li D, DeRose EF, London RE
NMR experiments that transfer conformational information from the bound to the uncomplexed state via exchange have been utilized for many years. It is demonstrated here that inter-ligand NOEs ('ILOEs'),...
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11-18-2010 08:31 PM
Mapping of protein structural ensembles by chemical shifts
Abstract Applying the chemical shift prediction programs SHIFTX and SHIFTS to a data base of protein structures with known chemical shifts we show that the averaged chemical shifts predicted from the structural ensembles explain better the experimental data than the lowest energy structures. This is in agreement with the fact that proteins in solution occur in multiple conformational states in fast exchange on the chemical shift time scale. However, in contrast to the real conditions in solution at ambient temperatures, the standard NMR structural calculation methods as well chemical shift...
Chemical proteomic tool for ligand mapping of CYP antitargets: an NMR-compatible 3D Q
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