Related ArticlesThe energetic cost of domain reorientation in maltose-binding protein as studied by NMR and fluorescence spectroscopy.
Proc Natl Acad Sci U S A. 2003 Oct 28;100(22):12700-5
Authors: Millet O, Hudson RP, Kay LE
Maltose-binding protein (MBP) is a two-domain protein that undergoes a ligand-mediated conformational rearrangement from an "open" to a "closed" structure on binding to maltooligosaccharides. To characterize the energy landscape associated with this transition, we have generated five variants of MBP with mutations located in the hinge region of the molecule. Residual dipolar couplings, measured in the presence of a weak alignment medium, have been used to establish that the average structures of the mutant proteins are related to each other by domain rotation about an invariant axis, with the rotation angle varying from 5 degrees to 28 degrees. Additionally, the domain orientations observed in the wild-type apo and ligand-bound (maltose, maltotriose, etc.) structures are related through a rotation of 35 degrees about the same axis. Remarkably, the free energy of unfolding, measured by equilibrium denaturation experiments and monitored by fluorescence spectroscopy, shows a linear correlation with the rotation angle, with the stability of the (apo)protein decreasing with domain closure by 212 +/- 16 cal mol-1 per degree of rotation. The apparent binding energy for maltose also shows a similar correlation with the interdomain angle, suggesting that the mutations, as they relate to binding, affect predominantly the ligand-free structure. The linearity of the energy change is interpreted in terms of an increase in the extent of hydrophobic surface that becomes solvent accessible on closure. The combination of structural, stability, and binding data allows separation of the energetics of domain reorientation from ligand binding. This work presents a near quantitative structure-energy-binding relationship for a series of mutants of MBP, illustrating the power of combined studies involving protein engineering and solution NMR spectroscopy.
[NMR paper] Protein energetic conformational analysis from NMR chemical shifts (PECAN) and its us
Protein energetic conformational analysis from NMR chemical shifts (PECAN) and its use in determining secondary structural elements.
Related Articles Protein energetic conformational analysis from NMR chemical shifts (PECAN) and its use in determining secondary structural elements.
J Biomol NMR. 2005 May;32(1):71-81
Authors: Eghbalnia HR, Wang L, Bahrami A, Assadi A, Markley JL
We present an energy model that combines information from the amino acid sequence of a protein and available NMR chemical shifts for the purposes of identifying low...
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11-25-2010 08:21 PM
[NMR paper] Prion protein interaction with the C-terminal SH3 domain of Grb2 studied using NMR an
Prion protein interaction with the C-terminal SH3 domain of Grb2 studied using NMR and optical spectroscopy.
Related Articles Prion protein interaction with the C-terminal SH3 domain of Grb2 studied using NMR and optical spectroscopy.
Biochemistry. 2004 Aug 17;43(32):10393-9
Authors: Lysek DA, Wüthrich K
Transmissible spongiform encephalopathies have been observed exclusively in organisms expressing the host-encoded prion protein (PrP). The function of the cellular isoform of PrP found in healthy organisms has so far not been identified,...
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11-24-2010 10:01 PM
[NMR paper] Binding ability of a HHP-tagged protein towards Ni2+ studied by paramagnetic NMR rela
Binding ability of a HHP-tagged protein towards Ni2+ studied by paramagnetic NMR relaxation: the possibility of obtaining long-range structure information.
Related Articles Binding ability of a HHP-tagged protein towards Ni2+ studied by paramagnetic NMR relaxation: the possibility of obtaining long-range structure information.
J Biomol NMR. 2004 Jun;29(2):175-85
Authors: Jensen MR, Lauritzen C, Dahl SW, Pedersen J, Led JJ
The binding ability of a protein with a metal binding tag towards Ni(2+) was investigated by longitudinal paramagnetic NMR...
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11-24-2010 09:51 PM
[NMR paper] Detection of a conformational change in maltose binding protein by (129)Xe NMR spectr
Detection of a conformational change in maltose binding protein by (129)Xe NMR spectroscopy.
Related Articles Detection of a conformational change in maltose binding protein by (129)Xe NMR spectroscopy.
J Am Chem Soc. 2001 Sep 5;123(35):8616-7
Authors: Rubin SM, Spence MM, Dimitrov IE, Ruiz EJ, Pines A, Wemmer DE
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11-19-2010 08:44 PM
[NMR paper] Ligand-induced structural changes to maltodextrin-binding protein as studied by solut
Ligand-induced structural changes to maltodextrin-binding protein as studied by solution NMR spectroscopy.
Related Articles Ligand-induced structural changes to maltodextrin-binding protein as studied by solution NMR spectroscopy.
J Mol Biol. 2001 Jun 15;309(4):961-74
Authors: Evenäs J, Tugarinov V, Skrynnikov NR, Goto NK, Muhandiram R, Kay LE
Solution NMR studies on the physiologically relevant ligand-free and maltotriose-bound states of maltodextrin-binding protein (MBP) are presented. Together with existing data on MBP in complex with...
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11-19-2010 08:32 PM
[NMR paper] Transmembrane domain of M2 protein from influenza A virus studied by solid-state (15)
Transmembrane domain of M2 protein from influenza A virus studied by solid-state (15)N polarization inversion spin exchange at magic angle NMR.
Related Articles Transmembrane domain of M2 protein from influenza A virus studied by solid-state (15)N polarization inversion spin exchange at magic angle NMR.
Biophys J. 2000 Aug;79(2):767-75
Authors: Song Z, Kovacs FA, Wang J, Denny JK, Shekar SC, Quine JR, Cross TA
The M2 protein from the influenza A virus forms a proton channel in the virion that is essential for infection. This tetrameric protein...
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[NMR paper] Effect of antibody binding on protein motions studied by hydrogen-exchange labeling a
Effect of antibody binding on protein motions studied by hydrogen-exchange labeling and two-dimensional NMR.
Related Articles Effect of antibody binding on protein motions studied by hydrogen-exchange labeling and two-dimensional NMR.
Biochemistry. 1992 Nov 10;31(44):10678-85
Authors: Mayne L, Paterson Y, Cerasoli D, Englander SW
We have used hydrogen-exchange labeling detected by 2D NMR to study antibody-protein interactions for two monoclonal antibodies raised against horse cytochrome c. The data show that these antibodies bind mainly to the...
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08-21-2010 11:45 PM
[NMR paper] Tritium NMR spectroscopy of ligand binding to maltose-binding protein.
Tritium NMR spectroscopy of ligand binding to maltose-binding protein.
Related Articles Tritium NMR spectroscopy of ligand binding to maltose-binding protein.
Biochemistry. 1991 Jun 4;30(22):5524-31
Authors: Gehring K, Williams PG, Pelton JG, Morimoto H, Wemmer DE
Tritium-labeled alpha- and beta-maltodextrins have been used to study their complexes with maltose-binding protein (MBP), a 40-kDa bacterial protein. Five substrates, from maltose to maltohexaose, were labeled at their reducing ends and their binding studied. Tritium NMR spectroscopy...