Increased Paramagnetic Effect of a Lanthanide Protein Probe by Two-Point Attachment
作者:Peter H. J. Keizers、Jean F. Desreux、Mark Overhand、Marcellus Ubbink
DOI:10.1021/ja0725201
日期:2007.8.1
A lanthanide ligand is reported, amenable to be immobilized on a protein surface via cysteine residues. This probe yields large single shifts of the protein nuclei resonances in HSQC NMR spectra and causes significant alignment of the protein in the magnetic field, providing additional structural restraints. Anchoring the probe by two cysteine residues instead of one is highly beneficial for the size of its effects.
Design, Synthesis, and Evaluation of a Lanthanide Chelating Protein Probe: CLaNP-5 Yields Predictable Paramagnetic Effects Independent of Environment
作者:Peter H. J. Keizers、Athanasios Saragliadis、Yoshitaka Hiruma、Mark Overhand、Marcellus Ubbink
DOI:10.1021/ja8054832
日期:2008.11.5
refine structures of proteins and the complexes they form by using restraints obtained from paramagneticNMR experiments. We report the design, synthesis, and spectroscopic evaluation of the lanthanide chelator, Caged Lanthanide NMRProbe 5 (CLaNP-5) readily attachable to a protein surface viatwo cysteine residues. The probe causes tunable pseudocontact shifts, alignment, paramagnetic relaxation enhancement