ARC Centre of Excellence for Innovations in Peptide & Protein Science, Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
Elwy H. Abdelkader
ARC Centre of Excellence for Innovations in Peptide & Protein Science, Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
Lydia Topping
Department of Chemistry, Loughborough University, Epinal Way, Loughborough, LE11 3TU, United Kingdom
Stephen J. Butler
Department of Chemistry, Loughborough University, Epinal Way, Loughborough, LE11 3TU, United Kingdom
ARC Centre of Excellence for Innovations in Peptide & Protein Science, Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
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Installing a tag containing a paramagnetic metal ion on a protein can lead to large changes (pseudocontact shifts) in the resonances observed in NMR spectra. These are easily measured and contain valuable long-range structural information. The present work shows that a single tagging site furnished with different tags can be sufficient to localise atoms in proteins with high accuracy. In fact, this strategy works almost as well as the same number of tags distributed over multiple tagging sites.
Installing a tag containing a paramagnetic metal ion on a protein can lead to large changes...