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    Three-Dimensional Protein Fold Determination from Backbone Amide Pseudocontact Shifts Generated by Lanthanide Tags at Multiple Sites

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    Type
    Article
    Authors
    Yagi, Hiromasa
    Pilla, Kala Bharath
    Maleckis, Ansis
    Graham, Bim
    Huber, Thomas
    Otting, Gottfried
    Date
    2013-06
    Permanent link to this record
    http://hdl.handle.net/10754/600019
    
    Metadata
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    Abstract
    Site-specific attachment of paramagnetic lanthanide ions to a protein generates pseudocontact shifts (PCS) in the nuclear magnetic resonance (NMR) spectra of the protein that are easily measured as changes in chemical shifts. By labeling the protein with lanthanide tags at four different sites, PCSs are observed for most amide protons and accurate information is obtained about their coordinates in three-dimensional space. The approach is demonstrated with the chaperone ERp29, for which large differences have been reported between X-ray and NMR structures of the C-terminal domain, ERp29-C. The results unambiguously show that the structure of rat ERp29-C in solution is similar to the crystal structure of human ERp29-C. PCSs of backbone amides were the only structural restraints required. Because these can be measured for more dilute protein solutions than other NMR restraints, the approach greatly widens the range of proteins amenable to structural studies in solution. © 2013 Elsevier Ltd. All rights reserved.
    Citation
    Yagi H, Pilla KB, Maleckis A, Graham B, Huber T, et al. (2013) Three-Dimensional Protein Fold Determination from Backbone Amide Pseudocontact Shifts Generated by Lanthanide Tags at Multiple Sites. Structure 21: 883–890. Available: http://dx.doi.org/10.1016/j.str.2013.04.001.
    Sponsors
    We thank Dr. Souren Mkrtchian for the plasmid encoding ERp29 and the supercomputing facility at the King Abdulla University of Science and Technology (KAUST, Saudi Arabia) for providing access to the Blue Gene/P (Shaheen) supercomputer. Financial support by the Australian Research Council, including a Future Fellowship to T.H., is gratefully acknowledged.
    Publisher
    Elsevier BV
    Journal
    Structure
    DOI
    10.1016/j.str.2013.04.001
    PubMed ID
    23643949
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.str.2013.04.001
    Scopus Count
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