5i9s

MicroED structure of proteinase K at 1.75 A resolution

spinqualitylabelsall models 5i9s, resolution 1.75Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5i9s is a 1 chain structure with sequence from Parengyodontium album. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron crystallography, Resolution 1.75Å Ligands: SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function PRTK_PARAQ Hydrolyzes keratin at aromatic and hydrophobic residues. Publication Abstract from PubMed The weak pixel counts surrounding the Bragg spots in a diffraction image are important for establishing a model of the background underneath the peak and estimating the reliability of the integrated intensities. Under certain circumstances, particularly with equipment not optimized for low-intensity measurements, these pixel values may be corrupted by corrections applied to the raw image. This can lead to truncation of low pixel counts, resulting in anomalies in the integrated Bragg intensities, such as systematically higher signal-to-noise ratios. A correction for this effect can be approximated by a three-parameter lognormal distribution fitted to the weakly positive-valued pixels at similar scattering angles. The procedure is validated by the improved refinement of an atomic model against structure factor amplitudes derived from corrected micro-electron diffraction (MicroED) images. Modeling truncated pixel values of faint reflections in MicroED images.,Hattne J, Shi D, de la Cruz MJ, Reyes FE, Gonen T J Appl Crystallogr. 2016 May 11;49(Pt 3):1029-1034. eCollection 2016 Jun 1. PMID:27275145 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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