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- EMDB-13908: Cryo-EM structure of Tn4430 TnpA transposase from Tn3 family in c... -
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Open data
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Basic information
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Title | Cryo-EM structure of Tn4430 TnpA transposase from Tn3 family in complex with 48 bp long transposon end DNA | |||||||||||||||
![]() | composite map of consensus and multibody refinement used for model refinement | |||||||||||||||
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![]() | DNA transposition / Tn3 family / antibiotic resistance / protein metamorphosis / RECOMBINATION | |||||||||||||||
Function / homology | Tn3 transposase DDE domain / Domain of unknown function DUF4158 / : / Tn3 transposase DDE domain / Domain of unknown function (DUF4158) / transposase activity / DNA transposition / DNA binding / Transposase for transposon Tn4430![]() | |||||||||||||||
Biological species | ![]() ![]() | |||||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.1 Å | |||||||||||||||
![]() | Shkumatov AV / Oger CA / Aryanpour N / Hallet BF / Efremov RG | |||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Structural insight into Tn3 family transposition mechanism. Authors: Alexander V Shkumatov / Nicolas Aryanpour / Cédric A Oger / Gérôme Goossens / Bernard F Hallet / Rouslan G Efremov / ![]() Abstract: Transposons are diverse mobile genetic elements that play the critical role as genome architects in all domains of life. Tn3 is a widespread family and among the first identified bacterial ...Transposons are diverse mobile genetic elements that play the critical role as genome architects in all domains of life. Tn3 is a widespread family and among the first identified bacterial transposons famed for their contribution to the dissemination of antibiotic resistance. Transposition within this family is mediated by a large TnpA transposase, which facilitates both transposition and target immunity. Howtever, a structural framework required for understanding the mechanism of TnpA transposition is lacking. Here, we describe the cryo-EM structures of TnpA from Tn4430 in the apo form and paired with transposon ends before and after DNA cleavage and strand transfer. We show that TnpA has an unusual architecture and exhibits a family specific regulatory mechanism involving metamorphic refolding of the RNase H-like catalytic domain. The TnpA structure, constrained by a double dimerization interface, creates a peculiar topology that suggests a specific role for the target DNA in transpososome assembly and activation. | |||||||||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 194.9 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 21.9 KB 21.9 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 15.6 KB | Display | ![]() |
Images | ![]() | 99.7 KB | ||
Masks | ![]() | 325 MB | ![]() | |
Filedesc metadata | ![]() | 7.1 KB | ||
Others | ![]() ![]() | 259.4 MB 259.3 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 772.5 KB | Display | ![]() |
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Full document | ![]() | 772.1 KB | Display | |
Data in XML | ![]() | 23.4 KB | Display | |
Data in CIF | ![]() | 30.5 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7qd5MC ![]() 7qd4C ![]() 7qd6C ![]() 7qd8C C: citing same article ( M: atomic model generated by this map |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Map
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Annotation | composite map of consensus and multibody refinement used for model refinement | ||||||||||||||||||||
Voxel size | X=Y=Z: 0.764 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Mask #1
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Density Histograms |
-Half map: half map 1
File | emd_13908_half_map_1.map | ||||||||||||
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Annotation | half map 1 | ||||||||||||
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Density Histograms |
-Half map: half map 2
File | emd_13908_half_map_2.map | ||||||||||||
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Annotation | half map 2 | ||||||||||||
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Density Histograms |
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Sample components
-Entire : TnpA-IR48 complex
Entire | Name: TnpA-IR48 complex |
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Components |
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-Supramolecule #1: TnpA-IR48 complex
Supramolecule | Name: TnpA-IR48 complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all Details: hyperactive TnpA mutant S911R in complex with 48 bp DNA containing transposon recognition sequence. |
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-Supramolecule #2: hyperactive TnpA mutant S911R
Supramolecule | Name: hyperactive TnpA mutant S911R / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1 / Details: hyperactive TnpA mutant S911R |
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Source (natural) | Organism: ![]() ![]() |
-Supramolecule #3: DNA substrate
Supramolecule | Name: DNA substrate / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #2-#3 / Details: DNA substrate |
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Source (natural) | Organism: ![]() ![]() |
-Macromolecule #1: Transposase for transposon Tn4430
Macromolecule | Name: Transposase for transposon Tn4430 / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 116.992117 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MGVKQLLSEA QRNELMDLSR LTEWDLVTFH TFSKHDLHLI LKHRRGYNRL GFALQLVLIR YPGWSLTEYK DIPQYVVAYV ASQLQIPPE EFLVYAKRGN TLWEHLGEIR TEYGYQNFSS EYKETLLQFL VQQAMDNNNT LYLIEITIST LRKMKVILPA M YVIEDIVW ...String: MGVKQLLSEA QRNELMDLSR LTEWDLVTFH TFSKHDLHLI LKHRRGYNRL GFALQLVLIR YPGWSLTEYK DIPQYVVAYV ASQLQIPPE EFLVYAKRGN TLWEHLGEIR TEYGYQNFSS EYKETLLQFL VQQAMDNNNT LYLIEITIST LRKMKVILPA M YVIEDIVW EAKQQADQKV YSILHDGLVQ EQKDQLDALL LPTINGKSPL AWLKDVPAQP SPESFLKVID RLQFVQKIGL TI DTTKINT NRLRQLARLG SKYEPYAFRR FNEVKRYSML VSFLLEITQD LIDYAIEIHD RLMMNLQTKG KKEQDEIQQA NGK KLNEKI LQFITVCGTL IEAKETGKDA FAALDEVMSW NEMVESVEEA KQLSRPLNYD YLDLLNTRYS YVRRYAPTLL RSLH FRATK SGEPVLQALD TIHELNETGK RKVPHGAPLH FVSNRWQKHV YDDDGNINRH YYELAALTEL RNHIRSGDIF VSGSR HHKA FDDYLIPYDE WNEVSNIPNG LTAPLKAEDY ITDRINRLNE HLEWLSKNSE KLEGVDISQG KLHVERLDRG TPEEAK AFS KLLHSMLPRI KLTDLLIEVA SWTGFHDQFI HASTNQSPDQ EEQNIVLATL MAMGTNIGLT KMAEATPGIS YRQMANA SQ WRMYDDAMVR AQSILVNFQK EQKLSSYWGD GTTSSSDGMR LSIAVRSLHA DSNPHYGTGK GGTIYRFVSD QLSAYHVK V ITTNARDALH VLDGLLHHET DLKIEEHYTD TAGYTDQVFA LTHLLGFRFA PRIRDLADTK LFSIPGGEEY ENVQALLKG KINVKLIKEN YEDIRRLAYS VQTGKVSSAL IMGKLGSYAR QNKLATALGE MGRIEKTLFT LDYISNKAVR RRVQKGLNKG EAINALARI IFFGQRGEFR ERALQDQLQR ARALNIIINA ISVWNTVYME KAVEELKARG EFREDLMPYA WPLGWEHINF L GEYKFEGL HDTGQMNLRP LRIKEPFYSP IRSFLEQKLI SEEDLNSAVD HHHHHH UniProtKB: Transposase for transposon Tn4430 |
-Macromolecule #2: IR48 DNA substrate, non transferred strand
Macromolecule | Name: IR48 DNA substrate, non transferred strand / type: dna / ID: 2 / Number of copies: 2 / Classification: DNA |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 14.756492 KDa |
Sequence | String: (DC)(DC)(DA)(DT)(DG)(DG)(DG)(DG)(DG)(DT) (DA)(DC)(DC)(DG)(DC)(DC)(DA)(DG)(DC)(DA) (DT)(DT)(DT)(DC)(DG)(DG)(DA)(DA)(DA) (DA)(DA)(DA)(DA)(DC)(DC)(DA)(DC)(DG)(DC) (DT) (DA)(DA)(DG)(DA)(DT)(DC)(DC)(DT) |
-Macromolecule #3: IR48 transferred strand
Macromolecule | Name: IR48 transferred strand / type: dna / ID: 3 / Number of copies: 2 / Classification: DNA |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 14.813468 KDa |
Sequence | String: (DA)(DG)(DG)(DA)(DT)(DC)(DT)(DT)(DA)(DG) (DC)(DG)(DT)(DG)(DG)(DT)(DT)(DT)(DT)(DT) (DT)(DT)(DC)(DC)(DG)(DA)(DA)(DA)(DT) (DG)(DC)(DT)(DG)(DG)(DC)(DG)(DG)(DT)(DA) (DC) (DC)(DC)(DC)(DC)(DA)(DT)(DG)(DG) |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 0.15 mg/mL |
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Buffer | pH: 7.5 / Details: 50 mM HEPES (pH 7.5), 100 mM NaCl, 30 mM L-Arg HCL |
Grid | Model: Quantifoil R2/1 / Material: COPPER / Support film - Material: CARBON / Support film - topology: HOLEY ARRAY |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 90 % |
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Electron microscopy
Microscope | JEOL CRYO ARM 300 |
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Specialist optics | Energy filter - Name: In-column Omega Filter / Energy filter - Slit width: 20 eV |
Image recording | Film or detector model: GATAN K3 (6k x 4k) / Detector mode: COUNTING / Digitization - Frames/image: 1-40 / Number grids imaged: 3 / Number real images: 11764 / Average exposure time: 3.0 sec. / Average electron dose: 62.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 4.7 µm / Nominal defocus min: 0.6 µm |
Sample stage | Specimen holder model: JEOL CRYOSPECPORTER / Cooling holder cryogen: NITROGEN |
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Image processing
-Atomic model buiding 1
Refinement | Space: REAL / Protocol: AB INITIO MODEL / Overall B value: 12.4 |
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Output model | ![]() PDB-7qd5: |