7la3

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

spinqualitylabelsall models 7la3, resolution 1.35Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7la3 is a 2 chain structure with sequence from Pseudomonas protegens Pf-5. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.349Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q4K977_PSEF5 Publication Abstract from PubMed 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. Reproducibility of protein x-ray diffuse scattering and potential utility for modeling atomic displacement parameters.,Su Z, Dasgupta M, Poitevin F, Mathews II, van den Bedem H, Wall ME, Yoon CH, Wilson MA Struct Dyn. 2021 Jul 8;8(4):044701. doi: 10.1063/4.0000087. eCollection 2021 Jul. PMID:34258328 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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