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Default In-cell (13)C NMR spectroscopy for the study of intrinsically disordered proteins.

In-cell (13)C NMR spectroscopy for the study of intrinsically disordered proteins.

In-cell (13)C NMR spectroscopy for the study of intrinsically disordered proteins.

Nat Protoc. 2014 Sep;9(9):2005-2016

Authors: Felli IC, Gonnelli L, Pierattelli R

Abstract
A large number of proteins carry out their function in highly flexible and disordered states, lacking a well-defined 3D structure. These proteins, referred to as intrinsically disordered proteins (IDPs), are now in the spotlight of modern structural biology. Nuclear magnetic resonance (NMR) spectroscopy represents a unique tool for accessing atomic resolution information on IDPs in complex environments as whole cells, provided that the methods are optimized to their peculiar properties and to the characteristics of in-cell experiments. We describe procedures for the preparation of in-cell NMR samples, as well as for the setup of NMR experiments and their application to in-cell studies, using human ?-synuclein overexpressed in Escherichia coli as an example. The expressed protein is labeled with (13)C and (15)N stable isotopes to enable the direct recording of (13)C-detected NMR experiments optimized for the properties of IDPs. The entire procedure covers 24 h, including cell transformation, cell growth overnight, setup of the spectrometer and NMR experiment recording.


PMID: 25079425 [PubMed - as supplied by publisher]



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