2N4R

NMR structure of Fbp28 WW domain L453D mutant

2N4R の概要

• エントリーDOI: 10.2210/pdb2n4r/pdb
• 関連するPDBエントリー: 1E0L 2N4S 2N4T 2N4U 2N4V 2N4W
• NMR情報: BMRB: 25678
• 分子名称: Transcription elongation regulator 1 (1 entity in total)
• 機能のキーワード: ww domain, transcription
• 由来する生物種: Homo sapiens (human)
• 細胞内の位置: Nucleus : O14776
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 4366.64

構造登録者

Medina, J.,Macias, M.,Martin-Malpartida, P.,Scheraga, H.A. (登録日: 2015-07-01, 公開日: 2015-10-21, 最終更新日: 2024-05-15)

主引用文献

Maisuradze, G.G.,Medina, J.,Kachlishvili, K.,Krupa, P.,Mozolewska, M.A.,Martin-Malpartida, P.,Maisuradze, L.,Macias, M.J.,Scheraga, H.A.
Preventing fibril formation of a protein by selective mutation.
Proc.Natl.Acad.Sci.USA, 112:13549-13554, 2015

PubMed Abstract: The origins of formation of an intermediate state involved in amyloid formation and ways to prevent it are illustrated with the example of the Formin binding protein 28 (FBP28) WW domain, which folds with biphasic kinetics. Molecular dynamics of protein folding trajectories are used to examine local and global motions and the time dependence of formation of contacts between C(α)s and C(β)s of selected pairs of residues. Focus is placed on the WT FBP28 WW domain and its six mutants (L26D, L26E, L26W, E27Y, T29D, and T29Y), which have structures that are determined by high-resolution NMR spectroscopy. The origins of formation of an intermediate state are elucidated, viz. as formation of hairpin 1 by a hydrophobic collapse mechanism causing significant delay of formation of both hairpins, especially hairpin 2, which facilitates the emergence of an intermediate state. It seems that three-state folding is a major folding scenario for all six mutants and WT. Additionally, two-state and downhill folding scenarios were identified in ∼ 15% of the folding trajectories for L26D and L26W, in which both hairpins are formed by the Matheson-Scheraga mechanism much faster than in three-state folding. These results indicate that formation of hairpins connecting two antiparallel β-strands determines overall folding. The correlations between the local and global motions identified for all folding trajectories lead to the identification of the residues making the main contributions in the formation of the intermediate state. The presented findings may provide an understanding of protein folding intermediates in general and lead to a procedure for their prevention.

PubMed: 26483482
DOI: 10.1073/pnas.1518298112

実験手法

SOLUTION NMR