7qa1

The structure of natural crystals of the Lysinibacillus sphaericus Tpp49Aa1 pesticidal protein elucidated using serial femtosecond crystallography at an X-ray free electron laser

spinqualitylabelsall models 7qa1, resolution 2.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7qa1 is a 2 chain structure with sequence from Lysinibacillus sphaericus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.2Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A7WK53_LYSSH Publication Abstract from PubMed The Lysinibacillus sphaericus proteins Tpp49Aa1 and Cry48Aa1 can together act as a toxin toward the mosquito Culex quinquefasciatus and have potential use in biocontrol. Given that proteins with sequence homology to the individual proteins can have activity alone against other insect species, the structure of Tpp49Aa1 was solved in order to understand this protein more fully and inform the design of improved biopesticides. Tpp49Aa1 is naturally expressed as a crystalline inclusion within the host bacterium, and MHz serial femtosecond crystallography using the novel nanofocus option at an X-ray free electron laser allowed rapid and high-quality data collection to determine the structure of Tpp49Aa1 at 1.62 A resolution. This revealed the packing of Tpp49Aa1 within these natural nanocrystals as a homodimer with a large intermolecular interface. Complementary experiments conducted at varied pH also enabled investigation of the early structural events leading up to the dissolution of natural Tpp49Aa1 crystals-a crucial step in its mechanism of action. To better understand the cooperation between the two proteins, assays were performed on a range of different mosquito cell lines using both individual proteins and mixtures of the two. Finally, bioassays demonstrated Tpp49Aa1/Cry48Aa1 susceptibility of Anopheles stephensi, Aedes albopictus, and Culex tarsalis larvae-substantially increasing the potential use of this binary toxin in mosquito control. Structure of the Lysinibacillus sphaericus Tpp49Aa1 pesticidal protein elucidated from natural crystals using MHz-SFX.,Williamson LJ, Galchenkova M, Best HL, Bean RJ, Munke A, Awel S, Pena G, Knoska J, Schubert R, Dorner K, Park HW, Bideshi DK, Henkel A, Kremling V, Klopprogge B, Lloyd-Evans E, Young MT, Valerio J, Kloos M, Sikorski M, Mills G, Bielecki J, Kirkwood H, Kim C, de Wijn R, Lorenzen K, Xavier PL, Rahmani Mashhour A, Gelisio L, Yefanov O, Mancuso AP, Federici BA, Chapman HN, Crickmore N, Rizkallah PJ, Berry C, Oberthur D Proc Natl Acad Sci U S A. 2023 Dec 5;120(49):e2203241120. doi: , 10.1073/pnas.2203241120. Epub 2023 Nov 28. PMID:38015839 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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