2022
Sensitivity-Enhanced Multidimensional Solid-State NMR Spectroscopy by Optimal-Control-Based Transverse Mixing Sequences
BLAHUT, Jan, Matthias J BRANDL, Tejaswini PRADHAN, Bernd REIF, Zdenek TOSNER et. al.Základní údaje
Originální název
Sensitivity-Enhanced Multidimensional Solid-State NMR Spectroscopy by Optimal-Control-Based Transverse Mixing Sequences
Autoři
BLAHUT, Jan, Matthias J BRANDL, Tejaswini PRADHAN, Bernd REIF a Zdenek TOSNER
Vydání
Journal of the American Chemical Society, Washington, American Chemical Society, 2022, 0002-7863
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10406 Analytical chemistry
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 15.000
Kód RIV
RIV/00216224:14740/22:00128889
Organizační jednotka
Středoevropský technologický institut
UT WoS
000853710600001
Klíčová slova anglicky
Carbon; Humans; Immunoglobulin Light Chains; Magnetic Resonance Spectroscopy; Nuclear Magnetic Resonance; Biomolecular; Proteins; Protons
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 16. 3. 2023 10:31, Mgr. Pavla Foltynová, Ph.D.
Anotace
V originále
Recently, proton-detected magic-angle spinning (MAS) solid-state nuclear magnetic resonance (NMR) spectroscopy has become an attractive tool to study the structure and dynamics of insoluble proteins at atomic resolution. The sensitivity of the employed multidimensional experiments can be systematically improved when both transversal components of the magnetization are transferred simultaneously after an evolution period. The method of preservation of equivalent pathways has been explored in solution-state NMR; however, it does not find widespread application due to relaxation issues connected with increased molecular size. We present here for the first time heteronuclear transverse mixing sequences for correlation experiments at moderate and fast MAS frequencies. Optimal control allows to boost the signal-to-noise ratio (SNR) beyond the expected factor of root 2 for each indirect dimension. In addition to the carbon-detected sensitivity-enhanced 2D NCA experiment, we present a novel proton detected, doubly sensitivity-enhanced 3D hCANH pulse sequence for which we observe a 3-fold improvement in SNR compared to the conventional experimental implementation. The sensitivity gain turned out to be essential to unambiguously characterize a minor fibril polymorph of a human lambda-III immunoglobulin light chain protein that escaped detection so far.
Návaznosti
90127, velká výzkumná infrastruktura |
|