6q2m

Crystal structure of Photinus pyralis Luciferase Pps6 mutant in complex with DLSA

spinqualitylabelsall models 6q2m, resolution 2.75Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6q2m is a 3 chain structure with sequence from Photinus pyralis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.75Å Ligands: DYD, EDO, SLU, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function LUCI_PHOPY Produces green light with a wavelength of 562 nm. Publication Abstract from PubMed The dazzling yellow-green light emission of the common North American firefly Photinus pyralis and other bioluminescent organisms has provided a wide variety of prominent research applications like reporter gene assays and in vivo imaging methods. While the P. pyralis enzyme has been extensively studied, only recently has a second Photinus luciferase been cloned from the species scintillans. Even though the enzymes share very high sequence identity (89.8%), the color of the light they emit, their specific activity and their stability to heat, pH, and chemical denaturation are quite different with the scintillans luciferase being generally more resistant. Through the construction and evaluation of the properties of chimeric domain swapped, single point, and various combined variants, we have determined that only six amino acid changes are necessary to confer all of the properties of the scintillans enzyme to wild-type P. pyralis luciferase. Altered stability properties were attributed to four of the amino acid changes (T214N/S276T/H332N/E354N), and single mutations each predominantly changed emission color (Y255F) and specific activity (A222C). Results of a crystallographic study of the P. pyralis enzyme containing the six changes (Pps6) provide some insight into the structural basis for some of the documented property differences. Mutagenesis and Structural Studies Reveal the Basis for the Activity and Stability Properties That Distinguish the Photinus Luciferases scintillans and pyralis.,Branchini BR, Fontaine DM, Southworth TL, Huta BP, Racela A, Patel KD, Gulick AM Biochemistry. 2019 Oct 10. doi: 10.1021/acs.biochem.9b00719. PMID:31560532 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Luciferase 3D structures

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