Related ArticlesNMR spin relaxation methods for characterization of disorder and folding in proteins.
J Mol Graph Model. 2001;19(1):3-12
Authors: Bracken C
The flexibility and dynamics of proteins directly influence the processes of protein folding, recognition, and function. NMR spin relaxation methods are used to assess the dynamics and mobility of proteins, for fast ps and ns motions as well as slower microsecond and ms events. The degree of protein flexibility and disorder as well as the changes in protein flexibility can be assessed by NMR spin relaxation methods at individual residues within the protein. In addition to probing protein dynamics, the changes in the NMR-derived order parameters can be used to estimate the entropic contributions of order-disorder transitions. Furthermore, kinetic processes in the ms time regime may be directly investigated to extract the rates of conformational interconversion, ligand binding, and protein folding processes. We show how a variety of dynamical information can be obtained from NMR relaxation measurements. We present examples that illustrate the use of NMR spin relaxation analysis for investigation of folding and disorder in proteins.
Paramagnetic relaxation enhancement to improve sensitivity of fast NMR methods: application to intrinsically disordered proteins
Paramagnetic relaxation enhancement to improve sensitivity of fast NMR methods: application to intrinsically disordered proteins
Abstract We report enhanced sensitivity NMR measurements of intrinsically disordered proteins in the presence of paramagnetic relaxation enhancement (PRE) agents such as Ni2+-chelated DO2A. In proton-detected 1H-15N SOFAST-HMQC and carbon-detected (H-flip)13CO-15N experiments, faster longitudinal relaxation enables the usage of even shorter interscan delays. This results in higher NMR signal intensities per units of experimental time, without adverse line...
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Mathematical treatment of adiabatic fast passage pulses for the computation of nuclear spin relaxation rates in proteins with conformational exchange
Mathematical treatment of adiabatic fast passage pulses for the computation of nuclear spin relaxation rates in proteins with conformational exchange
Abstract Although originally designed for broadband inversion and decoupling in NMR spectroscopy, recent methodological developments have introduced adiabatic fast passage (AFP) pulses into the field of protein dynamics. AFP pulses employ a frequency sweep, and have not only superior inversion properties with respect to offset effects, but they are also easily implemented into a pulse sequence. As magnetization is dragged from the +z to...
[NMR paper] NMR spectroscopic characterization of millisecond protein folding by transverse relaxation dispersion measurements.
NMR spectroscopic characterization of millisecond protein folding by transverse relaxation dispersion measurements.
Related Articles NMR spectroscopic characterization of millisecond protein folding by transverse relaxation dispersion measurements.
J Am Chem Soc. 2005 Sep 28;127(38):13207-12
Authors: Zeeb M, Balbach J
The cold shock protein CspB adopts its native and functional tertiary structure on the millisecond time scale. We employed transverse relaxation NMR methods, which allow a quantitative measurement of the cooperativity of this...
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[NMR paper] Metal binding sites in proteins: identification and characterization by paramagnetic NMR relaxation.
Metal binding sites in proteins: identification and characterization by paramagnetic NMR relaxation.
Related Articles Metal binding sites in proteins: identification and characterization by paramagnetic NMR relaxation.
Biochemistry. 2005 Aug 23;44(33):11014-23
Authors: Jensen MR, Petersen G, Lauritzen C, Pedersen J, Led JJ
A method is presented that allows the identification and quantitative characterization of metal binding sites in proteins using paramagnetic nuclear magnetic resonance spectroscopy. The method relies on the nonselective...
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[NMR paper] An 15N NMR spin relaxation dispersion study of the folding of a pair of engineered mu
An 15N NMR spin relaxation dispersion study of the folding of a pair of engineered mutants of apocytochrome b562.
Related Articles An 15N NMR spin relaxation dispersion study of the folding of a pair of engineered mutants of apocytochrome b562.
J Am Chem Soc. 2005 Apr 13;127(14):5066-72
Authors: Choy WY, Zhou Z, Bai Y, Kay LE
15N relaxation dispersion NMR spectroscopy has been used to study exchange dynamics in a pair of mutants of Rd-apocyt b562, a redesigned four-helix-bundle protein. An analysis of the relaxation data over a range of...
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11-25-2010 08:21 PM
[NMR paper] Thermodynamic insights into proteins from NMR spin relaxation studies.
Thermodynamic insights into proteins from NMR spin relaxation studies.
Related Articles Thermodynamic insights into proteins from NMR spin relaxation studies.
Curr Opin Struct Biol. 2001 Oct;11(5):555-9
Authors: Spyracopoulos L, Sykes BD
NMR spin relaxation measurements of picosecond to nanosecond timescale backbone and sidechain fluctuations of protein molecules, and subsequent entropic interpretation yield interesting, but sometimes counterintuitive, insights into proteins. The stabilities of proteins and protein interactions are achieved...
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11-19-2010 08:44 PM
[NMR paper] 19F-NMR spin-spin relaxation (T2) method for characterizing volatile anesthetic bindi
19F-NMR spin-spin relaxation (T2) method for characterizing volatile anesthetic binding to proteins. Analysis of isoflurane binding to serum albumin.
Related Articles 19F-NMR spin-spin relaxation (T2) method for characterizing volatile anesthetic binding to proteins. Analysis of isoflurane binding to serum albumin.
Biochemistry. 1992 Aug 11;31(31):7069-76
Authors: Dubois BW, Evers AS
This paper characterizes the low-affinity ligand binding interactions of a fluorinated volatile anesthetic, isoflurane (CHF2OCHClCF3), with bovine serum albumin...