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Geoffrey Bodenhausen

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Publications associées (143)

Multiple-Timescale Dynamics of Side-Chain Carboxyl and Carbonyl Groups in Proteins by C-13 Nuclear Spin Relaxation

Geoffrey Bodenhausen, Mikael Akke, Fabien Ferrage

Side-chain carboxyl and carbonyl groups play a major role in protein interactions and enzyme catalysis. A series of C-13 relaxation experiments is introduced to study the dynamics of carboxyl and carbonyl groups in protein side chains on both fast (sub-ns) ...

American Chemical Society2008

Coherence transfer between spy nuclei and nitrogen-14 in solids

Geoffrey Bodenhausen, Simone Cavadini

Coherence transfer from ‘spy nuclei’ such as 1H or 13C (S = 1/2) was used to excite single- or double-quantum coherences of 14N nuclei (I = 1) while the S spins were aligned along the static field, in the manner of heteronuclear single-quantum correlation ...

Academic Press Inc - Elsevier Science2008

Exchange Rate Constants of Invisible Protons in Proteins Determined by NMR Spectroscopy

Geoffrey Bodenhausen

Although labile protons that are exchanging rapidly with those of the solvent cannot be observed directly, their exchange rate constants can be determined by indirect detection of scalar-coupled neighboring nuclei. We have used heteronuclear NMR spectrosco ...

2008

Measurement of Slow Diffusion Coefficients of Molecules with Arbitrary Scalar Couplings via Long-Lived Spin States

Geoffrey Bodenhausen, Riddhiman Sarkar, Paul Romeo Vasos, Puneet Ahuja

New experiments are described for the determination of very slow diffusion constants by nuclear magnetic resonance (NMR) using long-lived (singlet) states. These experiments are suitable for molecules or conformations featuring a wide range of J-couplings. ...

2008

Efficient heteronuclear decoupling by quenching rotary resonance in solid-state NMR

Geoffrey Bodenhausen

We propose a new scheme for heteronuclear decoupling designed for fast magic-angle spinning (MAS), dubbed phase-inverted supercycled sequence for attenuation of rotary resonance (PISSARRO). Its efficiency compares favourably with CW, TPPM, SPINAL and XiX d ...

Elsevier2008

Predicting NMR relaxation rates in anisotropically tumbling proteins through networks of coupled rotators

Geoffrey Bodenhausen, Daniel Abergel

We show that the prediction of N-15 relaxation rates in proteins can be extended to systems with anisotropic global, rotational diffusion by using a network of coupled rotators (NCR), starting from a three-dimensional structure. The relaxation rates predic ...

Wiley-Blackwell2008

Evidence for Dynamics on a 100 ns Time Scale from Single- and Double-Quantum Nitrogen-14 NMR in Solid Peptides

Geoffrey Bodenhausen, Simone Cavadini, Simone Ulzega

The indirect detection of 14N spectra via protons in the manner of heteronuclear multiple-quantum correlation (HMQC) allows one to obtain single- (SQ) and double-quantum (DQ) 14N spectra in solids. A comparison of the SQ and DQ line widths as a function of ...

2008

Improving resolution in single-scan 2D spectroscopy

Geoffrey Bodenhausen

New schemes are introduced that allow one to improve the resolution in the indirect dimension of single-scan 'ultrafast' two-dimensional NMR spectra. The methods combine undersampling with band-selective pulses to recover signals that lie outside the detec ...

Academic Press Inc - Elsevier Science2008

Predicting conformational entropy of bond vectors in proteins by networks of coupled rotators

Geoffrey Bodenhausen, Daniel Abergel

In this article, a formal expression for the conformational entropy of a bond vector in a protein is derived using the networks of coupled rotators model for the description of internal dynamics. Analytical relationships between NMR order parameters and co ...

American Institute of Physics2008

America, America!

Geoffrey Bodenhausen

This account was written during a four-month stay in Berkeley from May to August 2007. It was partly inspired by a diary published by Simone de Beauvoir after her four-month lecture tour to the US in 1947.([1]) We could not resist the temptation of writing ...

2008

Determination of transverse relaxation rates of individual spins while quenching echo modulations due to homonuclear scalar couplings

Geoffrey Bodenhausen, Nicolas Aeby

The envelopes of spin-echo amplitudes obtained with trains of multiple refocusing pulses are normally modulated by homonuclear scalar couplings. Echo modulations make it difficult to determine transverse relaxation rate constants R2. Provided that the puls ...

Elsevier2008

Efficient heteronuclear decoupling by quenching rotary resonance in solid-state NMR

Geoffrey Bodenhausen

A method for heteronuclear decoupling in fast magic-angle spinning NMR measurements comprises application of a decoupling RF-pulse sequence with a decoupling-field amplitude 1⁄2 1 I on spins of a first nucleus and of an excitation pulse on spins of a secon ...

2008

Single or triple gradients?

Geoffrey Bodenhausen, Riddhiman Sarkar, Paul Romeo Vasos, Fabien Ferrage

Pulsed Field Gradients (PFGs) have become ubiquitous tools not only for Magnetic Resonance Imaging (MRI), but also for NMR experiments designed to study translational diffusion, for spatial encoding in ultra-fast spectroscopy, for the selection of desirabl ...

Academic Press Inc - Elsevier Science2008

Extending the Scope of Singlet-State Spectroscopy

Geoffrey Bodenhausen, Riddhiman Sarkar, Paul Romeo Vasos, Puneet Ahuja

Different decoupling sequences are tested - using various shaped radio-frequency (RF) pulses - to achieve the longest possible lifetimes of singlet-state populations over the widest possible bandwidths, that is, ranges of offsets and relative chemical shif ...

2007

Indirect Detection of Nitrogen-14 in Solid-State NMR Spectroscopy

Geoffrey Bodenhausen, Simone Cavadini

2007

Proton-Detected Nitrogen-14 NMR by Recoupling of Heteronuclear Dipolar Interactions using Symmetry-Based Sequences

Geoffrey Bodenhausen, Simone Cavadini

Elsevier2007

Molecular Properties Determined from Relaxation of Long-Lived Spin States

Geoffrey Bodenhausen, Riddhiman Sarkar, Paul Romeo Vasos, Puneet Ahuja

The populations of long-lived spin states, in particular, populations of singlet states that are comprised of antisymmetric combinations of product states, ∣αIβS⟩−∣βIαS⟩, are characterized by very long lifetimes because the dipole-dipole interaction betwee ...

2007

Networks of Coupled Rotators: Relationship between Structures and Internal Dynamics in Metal-Binding Proteins. Applications to apo- and holo-Calbindin

Geoffrey Bodenhausen, Daniel Abergel

2007

Singlet-State Exchange NMR Spectroscopy for the Study of Very Slow Dynamic Processes

Geoffrey Bodenhausen, Riddhiman Sarkar, Paul Romeo Vasos

2007

Quenching and Recoupling of Echo Modulations in NMR Spectroscopy

Geoffrey Bodenhausen, Nicolas Aeby

2007

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