5fgx | pdb_00005fgx

Thaumatin solved by native sulphur SAD using synchrotron radiation

spinqualitylabelsall models 5fgx, resolution 2.13Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5fgx is a 1 chain structure with sequence from Thaumatococcus daniellii. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: TLA Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum Function [THM1_THADA] Taste-modifying protein; intensely sweet-tasting. It is 100000 times sweeter than sucrose on a molar basis. Publication Abstract from PubMed Serial femtosecond crystallography (SFX) at X-ray free-electron lasers (XFELs) offers unprecedented possibilities for macromolecular structure determination of systems that are prone to radiation damage. However, phasing XFEL data de novo is complicated by the inherent inaccuracy of SFX data, and only a few successful examples, mostly based on exceedingly strong anomalous or isomorphous difference signals, have been reported. Here, it is shown that SFX data from thaumatin microcrystals can be successfully phased using only the weak anomalous scattering from the endogenous S atoms. Moreover, a step-by-step investigation is presented of the particular problems of SAD phasing of SFX data, analysing data from a derivative with a strong anomalous signal as well as the weak signal from endogenous S atoms. Protein structure determination by single-wavelength anomalous diffraction phasing of X-ray free-electron laser data.,Nass K, Meinhart A, Barends TR, Foucar L, Gorel A, Aquila A, Botha S, Doak RB, Koglin J, Liang M, Shoeman RL, Williams G, Boutet S, Schlichting I IUCrJ. 2016 Mar 9;3(Pt 3):180-91. doi: 10.1107/S2052252516002980. eCollection, 2016 May 1. PMID:27158504 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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