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Deprecated: Implicit conversion from float 267.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Angew+Chem+Int+Ed+Engl 2021 ; 60 (21): 11884-11891 Nephropedia Template TP
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Magnetization Transfer to Enhance NOE Cross-Peaks among Labile Protons: Applications to Imino-Imino Sequential Walks in SARS-CoV-2-Derived RNAs #MMPMID33683819
Novakovic M; Kupce E; Scherf T; Oxenfarth A; Schnieders R; Grun JT; Wirmer-Bartoschek J; Richter C; Schwalbe H; Frydman L
Angew Chem Int Ed Engl 2021[May]; 60 (21): 11884-11891 PMID33683819show ga
2D NOESY plays a central role in structural NMR spectroscopy. We have recently discussed methods that rely on solvent-driven exchanges to enhance NOE correlations between exchangeable and non-exchangeable protons in nucleic acids. Such methods, however, fail when trying to establish connectivities within pools of labile protons. This study introduces an alternative that also enhances NOEs between such labile sites, based on encoding a priori selected peaks by selective saturations. The resulting selective magnetization transfer (SMT) experiment proves particularly useful for enhancing the imino-imino cross-peaks in RNAs, which is a first step in the NMR resolution of these structures. The origins of these enhancements are discussed, and their potential is demonstrated on RNA fragments derived from the genome of SARS-CoV-2, recorded with better sensitivity and an order of magnitude faster than conventional 2D counterparts.
|*Protons[MESH]
|Magnetic Phenomena[MESH]
|Nuclear Magnetic Resonance, Biomolecular/*methods[MESH]