7ku1 | pdb_00007ku1

Data clustering and dynamics of chymotrypsinogen cluster 139 (green) structure

spinqualitylabelsall models 7ku1, resolution 2.39Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7ku1 is a 1 chain structure with sequence from Bos taurus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: SO4 Activity: Chymotrypsin, with EC number 3.4.21.1 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed One often observes small but measurable differences in the diffraction data measured from different crystals of a single protein. These differences might reflect structural differences in the protein and may reveal the natural dynamism of the molecule in solution. Partitioning these mixed-state data into single-state clusters is a critical step that could extract information about the dynamic behavior of proteins from hundreds or thousands of single-crystal data sets. Mixed-state data can be obtained deliberately (through intentional perturbation) or inadvertently (while attempting to measure highly redundant single-crystal data). To the extent that different states adopt different molecular structures, one expects to observe differences in the crystals; each of the polystates will create a polymorph of the crystals. After mixed-state diffraction data have been measured, deliberately or inadvertently, the challenge is to sort the data into clusters that may represent relevant biological polystates. Here, this problem is addressed using a simple multi-factor clustering approach that classifies each data set using independent observables, thereby assigning each data set to the correct location in conformational space. This procedure is illustrated using two independent observables, unit-cell parameters and intensities, to cluster mixed-state data from chymotrypsinogen (ChTg) crystals. It is observed that the data populate an arc of the reaction trajectory as ChTg is converted into chymotrypsin. A simple technique to classify diffraction data from dynamic proteins according to individual polymorphs.,Nguyen T, Phan KL, Kozakov D, Gabelli SB, Kreitler DF, Andrews LC, Jakoncic J, Sweet RM, Soares AS, Bernstein HJ Acta Crystallogr D Struct Biol. 2022 Mar 1;78(Pt 3):268-277. doi:, 10.1107/S2059798321013425. Epub 2022 Feb 18. PMID:35234141 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Chymotrypsin 3D structures

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