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Title: Characterization of the conformational preference and dynamics of the intrinsically disordered N-terminal region of beclin 1 by NMR spectroscopy
Austin Authors: Yao, S;Lee, Erinna F;Pettikiriarachchi, A;Evangelista, Marco;Keizer, DW;Fairlie, W Douglas
Affiliation: Austin Health, Heidelberg, Victoria, Australia
Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria, Australia
The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
Department of Medical Biology, The University of Melbourne, Parkville, Victoria, Australia
Olivia Newton-John Cancer Research Institute, Heidelberg, Victoria, Australia
School of Cancer Medicine, La Trobe University, Bundoora, Victoria, Australia
Department of Chemistry and Physics, La Trobe Institute for Molecular Science, Bundoora, Victoria, Australia
Issue Date: Sep-2016
Date: 2016-06-08
Publication information: Biochimica et Biophysica Acta - Proteins and Proteomics 2016, 1864(9): 1128-1137
Abstract: Beclin 1 is a 450 amino acid protein that plays critical roles in the early stages of autophagosome formation. We recently reported the successful expression, purification and structural characterisation of the entire N-terminal region of Beclin 1 (residues 1-150), including its backbone NMR chemical shift assignments. Based on assigned backbone NMR chemical shifts, it has been established that the N-terminal region of Beclin 1 (1-150), including the BH3 domain (112-123), is intrinsically disordered in the absence of its interaction partners. Here, a detailed study of its conformational preference and backbone dynamics obtained from an analysis of its secondary structure populations using the δ2D method, and the measurements of effective hydrodynamic radius as well as (1)H temperature coefficients, (1)H solvent exchange rates, and (15)N relaxation parameters of backbone amides using NMR spectroscopy is reported. These data provide further evidence for the intrinsically disordered nature of the N-terminal region of Beclin 1 and support the view that the helical conformation adopted by the Beclin 1 BH3 domain upon interaction with binding partners such as BCL-2 pro-survival proteins is likely induced rather than pre-existing.
DOI: 10.1016/j.bbapap.2016.06.005
Journal: Biochimica et Biophysica Acta - Proteins and Proteomics
PubMed URL:
Type: Journal Article
Subjects: BH3 domain
Beclin 1
Conformational dynamics
Intrinsically disordered protein
Appears in Collections:Journal articles

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