- Impact of spin label rigidity on extent and accuracy of distance information from PRE data.
Impact of spin label rigidity on extent and accuracy of distance information from PRE data.
Journal of biomolecular NMR (2017-05-14)
K A Schnorr, D B Gophane, C Helmling, E Cetiner, K Pasemann, B Fürtig, A Wacker, N S Qureshi, M Gränz, D Barthelmes, H R A Jonker, E Stirnal, S Th Sigurdsson, H Schwalbe
PMID28500543
摘要
Paramagnetic relaxation enhancement (PRE) is a versatile tool for NMR spectroscopic structural and kinetic studies in biological macromolecules. Here, we compare the quality of PRE data derived from two spin labels with markedly different dynamic properties for large RNAs using the I-A riboswitch aptamer domain (78 nt) from Mesoplamsa florum as model system. We designed two I-A aptamer constructs that were spin-labeled by noncovalent hybridization of short spin-labeled oligomer fragments. As an example of a flexible spin label,
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