Related ArticlesEpitope mapping of the phosphorylation motif of the HIV-1 protein Vpu bound to the selective monoclonal antibody using TRNOESY and STD NMR spectroscopy.
Biochemistry. 2004 Nov 23;43(46):14555-65
Authors: Gharbi-Benarous J, Bertho G, Evrard-Todeschi N, Coadou G, Megy S, Delaunay T, Benarous R, Girault JP
The conformational preferences of a 22-amino acid peptide (LIDRLIERAEDpSGNEpSEGEISA) that mimics the phosphorylated HIV-1-encoded virus protein U (Vpu) antigen have been investigated by NMR spectroscopy. Degradation of HIV receptor CD4 by the proteasome, mediated by the HIV-1 protein Vpu, is crucial for the release of fully infectious virions. Phosphorylation of Vpu at sites Ser52 and Ser56 on the DSGXXS motif is required for the interaction of Vpu with the ubiquitin ligase SCF(beta)(-TrCP) which triggers CD4 degradation by the proteasome. This motif is conserved in several signaling proteins known to be degraded by the proteasome. The interaction of the P-Vpu(41-62) peptide with its monoclonal antibody has been studied by transferred nuclear Overhauser effect NMR spectroscopy (TRNOESY) and saturation transfer difference NMR (STD NMR) spectroscopy. The peptide was found to adopt a bend conformation upon binding to the antibody; the peptide residues (Asp51-pSer56) forming this bend are recognized by the antibody as demonstrated by STD NMR experiments. The three-dimensional structure of P-Vpu(41-62) in the bound conformation was determined by TRNOESY spectra; the peptide adopts a compact structure in the presence of mAb with formation of several bends around Leu45 and Ile46 and around Ile60 and Ser61, with a tight bend created by the DpS(52)GNEpS(56) motif. STD NMR studies provide evidence for the existence of a conformational epitope containing tandem repeats of phosphoserine motifs. The peptide's epitope is predominantly located in the large bend and in the N-terminal segment, implicating bidentale association. These findings are in excellent agreement with a recently published NMR structure required for the interaction of Vpu with the SCF(beta)(-TrCP) protein.
Fragment-based discovery of novel thymidylate synthase leads by NMR screening and group epitope mapping.
Fragment-based discovery of novel thymidylate synthase leads by NMR screening and group epitope mapping.
Fragment-based discovery of novel thymidylate synthase leads by NMR screening and group epitope mapping.
Chem Biol Drug Des. 2010 Sep 1;76(3):218-33
Authors: Begley DW, Zheng S, Varani G
Solution-state nuclear magnetic resonance (NMR) is a versatile tool for the study of binding interactions between small molecules and macromolecular targets. We applied ligand-based NMR techniques to the study of human thymidylate synthase (hTS) using known...
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01-05-2011 09:51 PM
[NMR paper] Precise epitope mapping of malaria parasite inhibitory antibodies by TROSY NMR cross-
Precise epitope mapping of malaria parasite inhibitory antibodies by TROSY NMR cross-saturation.
Related Articles Precise epitope mapping of malaria parasite inhibitory antibodies by TROSY NMR cross-saturation.
Biochemistry. 2005 Jan 18;44(2):518-23
Authors: Morgan WD, Frenkiel TA, Lock MJ, Grainger M, Holder AA
We have applied NMR cross-saturation with TROSY detection to the problem of precisely mapping conformational epitopes on complete protein antigen molecules. We have investigated complexes of the Fab fragments of two antibodies that...
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11-24-2010 11:14 PM
[NMR paper] Epitope mapping and competitive binding of HSA drug site II ligands by NMR diffusion
Epitope mapping and competitive binding of HSA drug site II ligands by NMR diffusion measurements.
Related Articles Epitope mapping and competitive binding of HSA drug site II ligands by NMR diffusion measurements.
J Am Chem Soc. 2004 Nov 3;126(43):14258-66
Authors: Lucas LH, Price KE, Larive CK
It is important to characterize drug-albumin binding during drug discovery and lead optimization as strong binding may reduce bioavailability and/or increase the drug's in vivo half-life. Despite knowing about the location of human serum albumin (HSA)...
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11-24-2010 10:03 PM
[NMR paper] NMR studies of the phosphorylation motif of the HIV-1 protein Vpu bound to the F-box
NMR studies of the phosphorylation motif of the HIV-1 protein Vpu bound to the F-box protein beta-TrCP.
Related Articles NMR studies of the phosphorylation motif of the HIV-1 protein Vpu bound to the F-box protein beta-TrCP.
Biochemistry. 2003 Dec 23;42(50):14741-51
Authors: Coadou G, Gharbi-Benarous J, Megy S, Bertho G, Evrard-Todeschi N, Segeral E, Benarous R, Girault JP
A protein-protein association regulated by phosphorylation of serine is examined by NMR studies. Degradation of the HIV receptor CD4 by the proteasome, mediated by the HIV-1...
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11-24-2010 09:16 PM
[NMR paper] Epitope mapping of sialyl Lewis(x) bound to E-selectin using saturation transfer diff
Epitope mapping of sialyl Lewis(x) bound to E-selectin using saturation transfer difference NMR experiments.
Related Articles Epitope mapping of sialyl Lewis(x) bound to E-selectin using saturation transfer difference NMR experiments.
Glycobiology. 2003 Jun;13(6):435-43
Authors: Rinnbauer M, Ernst B, Wagner B, Magnani J, Benie AJ, Peters T
A complex between sialyl Lewisx (alpha-D-Neu5Ac-- beta-D-Gal---beta-D-GlcNAc-O-8 COOMe) and E-selectin was studied using saturation transfer difference (STD) nuclear magnetic resonance (NMR) experiments....
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[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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[NMR paper] Group epitope mapping by saturation transfer difference NMR to identify segments of a
Group epitope mapping by saturation transfer difference NMR to identify segments of a ligand in direct contact with a protein receptor.
Related Articles Group epitope mapping by saturation transfer difference NMR to identify segments of a ligand in direct contact with a protein receptor.
J Am Chem Soc. 2001 Jun 27;123(25):6108-17
Authors: Mayer M, Meyer B
A protocol based on saturation transfer difference (STD) NMR spectra was developed to characterize the binding interactions at an atom level, termed group epitope mapping (GEM). As an example...
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11-19-2010 08:32 PM
Simultaneous detection of amide and methyl correlations using a time shared NMR experiment: application to binding epitope mapping
Simultaneous detection of amide and methyl correlations using a time shared NMR experiment: application to binding epitope mapping
Peter Würtz, Olli Aitio, Maarit Hellman and Perttu Permi
Journal of Biomolecular NMR; 2007; 39(2) pp 97 - 105
Abstract:
Simultaneous recording of different NMR parameters is an efficient way to reduce the overall experimental time and speed up structural studies of biological macromolecules. This can especially be beneficial in the case of fast NMR-based drug screening applications or for collecting NOE restraints, where prohibitively long data collection...
Epitope mapping of the phosphorylation motif of the HIV-1 protein Vpu bound to the se
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