HA-detected experiments for the backbone assignment of intrinsically disordered prote
Abstract We propose a new alpha proton detection based approach for the sequential assignment of natively unfolded proteins. The proposed protocol superimposes on following features: HA-detection (1) enables assignment of natively unfolded proteins at any pH, i.e., it is not sensitive to rapid chemical exchange undergoing in natively unfolded proteins even at moderately high pH. (2) It allows straightforward assignment of proline-rich polypeptides without additional proline-customized experiments. (3) It offers more streamlined and less ambiguous assignment based on solely intraresidual 15N(i)-13C�(i)-Hα(i) (or 15N(i)-13Cα(i)-Hα(i)) and sequential 15N(i + 1)-13C�(i)-Hα(i) (or 15N(i + 1)-13Cα(i)-Hα(i)) correlation experiments together with efficient use of chemical shifts of 15N and 13C� nuclei, which show smaller dependence on residue type. We have tested the proposed protocol on two proteins, small globular 56-residue GB1, and highly disordered, proline-rich 47-residue fifth repeat of EspFU. Using the proposed approach, we were able to assign 90% of 1Hα, 13Cα, 13C�, 15N chemical shifts in EspFU. We reckon that the HA-detection based strategy will be very useful in the assignment of natively unfolded proline-rich proteins or polypeptide chains.
Content Type Journal Article
DOI 10.1007/s10858-010-9421-0
Authors
Sampo Mäntylahti, University of Helsinki Program in Structural Biology and Biophysics, Institute of Biotechnology/NMR Laboratory P.O. Box 65 00014 Helsinki Finland
Olli Aitio, University of Helsinki Program in Structural Biology and Biophysics, Institute of Biotechnology/NMR Laboratory P.O. Box 65 00014 Helsinki Finland
Maarit Hellman, University of Helsinki Program in Structural Biology and Biophysics, Institute of Biotechnology/NMR Laboratory P.O. Box 65 00014 Helsinki Finland
Perttu Permi, University of Helsinki Program in Structural Biology and Biophysics, Institute of Biotechnology/NMR Laboratory P.O. Box 65 00014 Helsinki Finland
High dimensional and high resolution pulse sequences for backbone resonance assignment of intrinsically disordered proteins
High dimensional and high resolution pulse sequences for backbone resonance assignment of intrinsically disordered proteins
Abstract Four novel 5D (HACA(N)CONH, HNCOCACB, (HACA)CON(CA)CONH, (H)NCO(NCA)CONH), and one 6D ((H)NCO(N)CACONH) NMR pulse sequences are proposed. The new experiments employ non-uniform sampling that enables achieving high resolution in indirectly detected dimensions. The experiments facilitate resonance assignment of intrinsically disordered proteins. The novel pulse sequences were successfully tested using δ subunit (20 kDa) of Bacillus subtilis RNA polymerase...
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02-21-2012 03:40 AM
Backbone and side chain NMR assignments for the intrinsically disordered cytoplasmic domain of human neuroligin-3.
Backbone and side chain NMR assignments for the intrinsically disordered cytoplasmic domain of human neuroligin-3.
Backbone and side chain NMR assignments for the intrinsically disordered cytoplasmic domain of human neuroligin-3.
Biomol NMR Assign. 2011 Jun 7;
Authors: Wood K, Paz A, Dijkstra K, Scheek RM, Otten R, Silman I, Sussman JL, Mulder FA
Neuroligins act as heterophilic adhesion molecules at neuronal synapses. Their cytoplasmic domains interact with synaptic scaffolding proteins, and have been shown to be intrinsically disordered. Here we...
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06-08-2011 11:30 AM
Covalent structural changes in unfolded GroES that lead to amyloid fibril formation detected by NMR: Insight into intrinsically disordered proteins.
Covalent structural changes in unfolded GroES that lead to amyloid fibril formation detected by NMR: Insight into intrinsically disordered proteins.
Covalent structural changes in unfolded GroES that lead to amyloid fibril formation detected by NMR: Insight into intrinsically disordered proteins.
J Biol Chem. 2011 Apr 20;
Authors: Iwasa H, Meshitsuka S, Hongo K, Mizobata T, Kawata Y
Co-chaperonin GroES from E. coli works with chaperonin GroEL to mediate the folding reactions of various proteins. However, under specific conditions, i. e., the...
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04-22-2011 02:00 PM
5D 13C-detected experiments for backbone assignment of unstructured proteins with a very low signal dispersion
5D 13C-detected experiments for backbone assignment of unstructured proteins with a very low signal dispersion
Abstract Two novel 5D NMR experiments (CACONCACO, NCOCANCO) for backbone assignment of disordered proteins are presented. The pulse sequences exploit relaxation properties of the unstructured proteins and combine the advantages of 13C-direct detection, non-uniform sampling, and longitudinal relaxation optimization to maximize the achievable resolution and minimize the experimental time. The pulse sequences were successfully tested on the sample of partially disordered delta...
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03-22-2011 07:32 PM
ncIDP-assign: A SPARKY extension for the effective NMR assignment of intrinsically disordered proteins.
ncIDP-assign: A SPARKY extension for the effective NMR assignment of intrinsically disordered proteins.
ncIDP-assign: A SPARKY extension for the effective NMR assignment of intrinsically disordered proteins.
Bioinformatics. 2011 Mar 3;
Authors: Tamiola K, Mulder FA
SUMMARY: We describe here the ncIDP-assign extension for the popular NMR assignment programme SPARKY, which aids in the sequence-specific resonance assignment of intrinsically disordered proteins (IDPs). The assignment plugin greatly facilitates the effective matching of a set of...
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03-05-2011 01:02 PM
Extension of the HA-detection based approach: (HCA)CON(CA)H and (HCA)NCO(CA)H experiments for the main-chain assignment of intrinsically disordered proteins
Extension of the HA-detection based approach: (HCA)CON(CA)H and (HCA)NCO(CA)H experiments for the main-chain assignment of intrinsically disordered proteins
Abstract Extensive resonance overlap exacerbates assignment of intrinsically disordered proteins (IDPs). This issue can be circumvented by utilizing 15N, 13C� and 1HN spins, where the chemical shift dispersion is mainly dictated by the characteristics of consecutive amino acid residues. Especially 15N and 13C� spins offer superior chemical shift dispersion in comparison to 13Cα and 13Cβ spins. However, HN-detected experiments...
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01-29-2011 05:31 AM
Sparsely-sampled High-resolution 4-D Experiments for Efficient Backbone Resonance Assignment of Disordered Proteins
Sparsely-sampled High-resolution 4-D Experiments for Efficient Backbone Resonance Assignment of Disordered Proteins
Publication year: 2011
Source: Journal of Magnetic Resonance, In Press, Accepted Manuscript, Available online 4 January 2011</br>
Jie, Wen , Jihui, Wu , Pei, Zhou</br>
Intrinsically disordered proteins (IDPs) play important roles in many critical cellular processes. Due to their limited chemical shift dispersion, IDPs often require four pairs of resonance connectivities (H?, C?, C? and CO) for establishing sequential backbone assignment. Because most conventional 4-D...
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01-05-2011 11:03 AM
13C-direct detected NMR experiments for the sequential J-based resonance assignment o
Abstract We present here a set of 13C-direct detected NMR experiments to facilitate the resonance assignment of RNA oligonucleotides. Three experiments have been developed: (1) the (H)CC-TOCSY-experiment utilizing a virtual decoupling scheme to assign the intraresidual ribose 13C-spins, (2) the (H)CPC-experiment that correlates each phosphorus with the C4â?² nuclei of adjacent nucleotides via J(C,P) couplings and (3) the (H)CPC-CCH-TOCSY-experiment that correlates the phosphorus nuclei with the respective C1â?²,H1â?² ribose signals. The experiments were applied to two RNA hairpin structures....
HA-detected experiments for the backbone assignment of intrinsically disordered prote
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