3N0D

Crystal structure of WDR5 mutant (W330F)

3N0D の概要

• エントリーDOI: 10.2210/pdb3n0d/pdb
• 関連するPDBエントリー: 3MXX 3N0E
• 分子名称: WD repeat-containing protein 5 (2 entities in total)
• 機能のキーワード: wdr5, wd-repeat protein 5, asp-his-ser-trp tetrad, thermostability, circular dichroism, folding energy, guanidine hydrochloride, transcription
• 由来する生物種: Homo sapiens (human)
• 細胞内の位置: Nucleus: P61964
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 34589.19

構造登録者

Wu, Y.-D.,Wu, X.-H.,Gao, Y.,Chen, R.-C. (登録日: 2010-05-13, 公開日: 2010-10-20, 最終更新日: 2023-11-01)

主引用文献

Wu, X.-H.,Chen, R.-C.,Gao, Y.,Wu, Y.-D.
The Effect of Asp-His-Ser/Thr-Trp Tetrad on the Thermostability of WD40-Repeat Proteins
Biochemistry, 49:10237-10245, 2010

PubMed Abstract: We recently found that Asp-His-Ser/Thr-Trp hydrogen-bonded tetrads are widely and uniquely present in the WD40-repeat proteins. WDR5 protein is a seven WD40-repeat propeller with five such tetrads. To explore the effect of the tetrad on the structure and stability of WD40-repeat proteins, the wild-type WDR5 and its seven mutants involving the substitutions of tetrad residues have been isolated. The crystal structures of the wild-type WDR5 and its three WDR5 mutants have been determined by X-ray diffraction method. The mutations of the tetrad residues are found not to change the basic structural features. The denaturing profiles of the wild type and the seven mutants with the use of denaturant guanidine hydrochloride have been studied by circular dichroism spectroscopy to determine the folding free energies of these proteins. The folding free energies of the wild type and the S62A, S146A, S188A, D192E, W330F, W330Y, and D324E mutants are measured to be about -11.6, -2.7, -3.1, -2.9, -3.6, -7.1, -7.0, and -7.5 kcal/mol, respectively. These suggest that (1) the hydrogen bonds in these hydrogen bond networks are unusually strong; (2) each hydrogen-bonded tetrad provides over 12 kcal/mol stability to the protein; thus, the removal of any single tetrad would cause unfolding of the protein; (3) since there are five tetrads, the protein must be in a highly unstable state without the tetrads, which might be related to its biological functions.

PubMed: 20939513
DOI: 10.1021/bi101321y

実験手法

X-RAY DIFFRACTION (2.3 Å)