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Weitzel, Alexander ; Samol, Claudia ; Oefner, Peter J. ; Gronwald, Wolfram

Robust Metabolite Quantification from J-Compensated 2D 1H-13C-HSQC Experiments

Weitzel, Alexander, Samol, Claudia, Oefner, Peter J. and Gronwald, Wolfram (2020) Robust Metabolite Quantification from J-Compensated 2D 1H-13C-HSQC Experiments. Metabolites 10 (11), p. 449.

Date of publication of this fulltext: 13 Nov 2020 05:50
Article
DOI to cite this document: 10.5283/epub.44164


Abstract

The spectral resolution of 2D H-1-C-13 heteronuclear single quantum coherence (H-1-C-13-HSQC) nuclear magnetic resonance (NMR) spectra facilitates both metabolite identification and quantification in nuclear magnetic resonance-based metabolomics. However, quantification is complicated by variations in magnetization transfer, which among others originate mainly from scalar coupling differences. ...

The spectral resolution of 2D H-1-C-13 heteronuclear single quantum coherence (H-1-C-13-HSQC) nuclear magnetic resonance (NMR) spectra facilitates both metabolite identification and quantification in nuclear magnetic resonance-based metabolomics. However, quantification is complicated by variations in magnetization transfer, which among others originate mainly from scalar coupling differences. Methods that compensate for variation in scalar coupling include the generation of calibration factors for individual signals or the use of additional pulse sequence schemes such as quantitative HSQC (Q-HSQC) that suppress the J(CH)-dependence by modulating the polarization transfer delays of HSQC or, additionally, employ a pure-shift homodecoupling approach in the 1(H) dimension, such as Quantitative, Perfected and Pure Shifted HSQC (QUIPU-HSQC). To test the quantitative accuracy of these three methods, employing a 600 MHz NMR spectrometer equipped with a helium cooled cryoprobe, a Latin-square design that covered the physiological concentration ranges of 10 metabolites was used. The results show the suitability of all three methods for the quantification of highly abundant metabolites. However, the substantially increased residual water signal observed in QUIPU-HSQC spectra impeded the quantification of low abundant metabolites located near the residual water signal, thus limiting its utility in high-throughput metabolite fingerprinting studies.



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Details

Item typeArticle
Journal or Publication TitleMetabolites
Publisher:MDPI
Place of Publication:BASEL
Volume:10
Number of Issue or Book Chapter:11
Page Range:p. 449
Date7 November 2020
InstitutionsMedicine > Institut für Funktionelle Genomik > Lehrstuhl für Funktionelle Genomik (Prof. Oefner)
Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Christoph Strunk
Identification Number
ValueType
10.3390/metabo10110449DOI
33171777PubMed ID
KeywordsNMR DATA; HSQC; SPECTROSCOPY; H-1; metabolomics; NMR; quantification; HSQC; Q-HSQC; QUIPU-HSQC; water suppression; cryoprobe
Dewey Decimal Classification500 Science > 530 Physics
600 Technology > 610 Medical sciences Medicine
StatusPublished
RefereedYes, this version has been refereed
Created at the University of RegensburgYes
URN of the UB Regensburgurn:nbn:de:bvb:355-epub-441645
Item ID44164

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