7LA3

Pseudomonas fluorescens G150A isocyanide hydratase (G150A-3) at 274K, Refmac5-refined

7LA3 の概要

• エントリーDOI: 10.2210/pdb7la3/pdb
• 関連するPDBエントリー: 7L9Q 7L9S 7L9W 7L9Z 7LA0
• 分子名称: Isonitrile hydratase InhA (2 entities in total)
• 機能のキーワード: dj-1/pfpi superfamily, lyase
• 由来する生物種: Pseudomonas fluorescens (strain ATCC BAA-477 / NRRL B-23932 / Pf-5)
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 48389.35

構造登録者

Su, Z.,Dasgupta, M.,Poitevin, F.,Mathews, I.I.,van den Bedem, H.,Wall, M.E.,Yoon, C.H.,Wilson, M.A. (登録日: 2021-01-05, 公開日: 2021-02-03, 最終更新日: 2023-10-18)

主引用文献

Su, Z.,Dasgupta, M.,Poitevin, F.,Mathews, I.I.,van den Bedem, H.,Wall, M.E.,Yoon, C.H.,Wilson, M.A.
Reproducibility of protein x-ray diffuse scattering and potential utility for modeling atomic displacement parameters.
Struct Dyn., 8:044701-044701, 2021

PubMed Abstract: Protein structure and dynamics can be probed using x-ray crystallography. Whereas the Bragg peaks are only sensitive to the average unit-cell electron density, the signal between the Bragg peaks-diffuse scattering-is sensitive to spatial correlations in electron-density variations. Although diffuse scattering contains valuable information about protein dynamics, the diffuse signal is more difficult to isolate from the background compared to the Bragg signal, and the reproducibility of diffuse signal is not yet well understood. We present a systematic study of the reproducibility of diffuse scattering from isocyanide hydratase in three different protein forms. Both replicate diffuse datasets and datasets obtained from different mutants were similar in pairwise comparisons (Pearson correlation coefficient ≥0.8). The data were processed in a manner inspired by previously published methods using custom software with modular design, enabling us to perform an analysis of various data processing choices to determine how to obtain the highest quality data as assessed using unbiased measures of symmetry and reproducibility. The diffuse data were then used to characterize atomic mobility using a liquid-like motions (LLM) model. This characterization was able to discriminate between distinct anisotropic atomic displacement parameter (ADP) models arising from different anisotropic scaling choices that agreed comparably with the Bragg data. Our results emphasize the importance of data reproducibility as a model-free measure of diffuse data quality, illustrate the ability of LLM analysis of diffuse scattering to select among alternative ADP models, and offer insights into the design of successful diffuse scattering experiments.

PubMed: 34258328
DOI: 10.1063/4.0000087

実験手法

X-RAY DIFFRACTION (1.349 Å)