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- EMDB-19515: Structure of IFTA and IFTB in Retrograde Intraflagellar transport... -
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Open data
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Basic information
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Title | Structure of IFTA and IFTB in Retrograde Intraflagellar transport trains | |||||||||
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![]() | Cilia / IFT / train / retrograde / PROTEIN TRANSPORT | |||||||||
Function / homology | ![]() intraciliary transport particle B binding / intraciliary transport particle / intraciliary transport involved in cilium assembly / intraciliary transport particle B / intraciliary transport particle A / cellular component assembly / outer dynein arm assembly / cilium-dependent cell motility / intraciliary retrograde transport / intraciliary transport ...intraciliary transport particle B binding / intraciliary transport particle / intraciliary transport involved in cilium assembly / intraciliary transport particle B / intraciliary transport particle A / cellular component assembly / outer dynein arm assembly / cilium-dependent cell motility / intraciliary retrograde transport / intraciliary transport / regulation of cilium assembly / axoneme assembly / axonemal microtubule / cilium organization / protein localization to cilium / non-motile cilium assembly / ciliary plasm / non-motile cilium / motile cilium / ciliary membrane / post-transcriptional regulation of gene expression / ciliary base / microtubule organizing center / kinesin binding / axoneme / cilium assembly / beta-tubulin binding / RNA processing / centriole / tubulin binding / regulation of microtubule cytoskeleton organization / regulation of protein stability / apical part of cell / protein transport / microtubule binding / cytoskeleton / protein stabilization / ciliary basal body / cilium / GTPase activity / GTP binding / metal ion binding / cytoplasm Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | subtomogram averaging / cryo EM / Resolution: 15.4 Å | |||||||||
![]() | Lacey S / Pigino G | |||||||||
Funding support | European Union, 2 items
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![]() | ![]() Title: Extensive structural rearrangement of intraflagellar transport trains underpins bidirectional cargo transport. Authors: Samuel E Lacey / Andrea Graziadei / Gaia Pigino / ![]() Abstract: Bidirectional transport in cilia is carried out by polymers of the IFTA and IFTB protein complexes, called anterograde and retrograde intraflagellar transport (IFT) trains. Anterograde trains deliver ...Bidirectional transport in cilia is carried out by polymers of the IFTA and IFTB protein complexes, called anterograde and retrograde intraflagellar transport (IFT) trains. Anterograde trains deliver cargoes from the cell to the cilium tip, then convert into retrograde trains for cargo export. We set out to understand how the IFT complexes can perform these two directly opposing roles before and after conversion. We use cryoelectron tomography and in situ cross-linking mass spectrometry to determine the structure of retrograde IFT trains and compare it with the known structure of anterograde trains. The retrograde train is a 2-fold symmetric polymer organized around a central thread of IFTA complexes. We conclude that anterograde-to-retrograde remodeling involves global rearrangements of the IFTA/B complexes and requires complete disassembly of the anterograde train. Finally, we describe how conformational changes to cargo-binding sites facilitate unidirectional cargo transport in a bidirectional system. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 1.9 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 46.2 KB 46.2 KB | Display Display | ![]() |
Images | ![]() | 34.8 KB | ||
Filedesc metadata | ![]() | 16 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 318 KB | Display | ![]() |
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Full document | ![]() | 317.6 KB | Display | |
Data in XML | ![]() | 4.7 KB | Display | |
Data in CIF | ![]() | 5.4 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8ruyMC 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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Related items in Molecule of the Month |
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Map
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Projections & slices | Image control
Images are generated by Spider. generated in cubic-lattice coordinate | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 6.06 Å | ||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
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Sample components
+Entire : In situ retrograde intraflagellar transport trains in dhc1b-3 mut...
+Supramolecule #1: In situ retrograde intraflagellar transport trains in dhc1b-3 mut...
+Macromolecule #1: Intraflagellar transport protein 144
+Macromolecule #2: Intraflagellar transport particle protein 140
+Macromolecule #3: Osm-6-like protein
+Macromolecule #4: Intraflagellar transport protein 80
+Macromolecule #5: IFT54
+Macromolecule #6: Intraflagellar transport particle protein IFT20
+Macromolecule #7: Clusterin-associated protein 1
+Macromolecule #8: Intraflagellar transport protein 74
+Macromolecule #9: Intraflagellar transport protein 81
+Macromolecule #10: Intraflagellar transport protein 27
+Macromolecule #11: Intraflagellar transport protein 25
+Macromolecule #12: Intraflagellar transport protein 46
+Macromolecule #13: Intraflagellar transport protein 22
+Macromolecule #14: Intraflagellar transport protein 172
+Macromolecule #15: Intraflagellar transport protein 122 homolog
+Macromolecule #16: Intraflagellar transport protein 121
+Macromolecule #17: Intraflagellar transport protein 139
+Macromolecule #18: IFT88
+Macromolecule #19: IFT70
+Macromolecule #20: Intraflagellar transport protein 57
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | subtomogram averaging |
Aggregation state | cell |
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Sample preparation
Buffer | pH: 7 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | TFS KRIOS |
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Image recording | Film or detector model: TFS FALCON 4i (4k x 4k) / Average electron dose: 2.6 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 4.0 µm / Nominal defocus min: 2.0 µm |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Final reconstruction | Applied symmetry - Point group: C2 (2 fold cyclic) / Resolution.type: BY AUTHOR / Resolution: 15.4 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.1.3) Details: Composite map, with constituent maps ranging from 15.4 to 28.3 angstrom Number subtomograms used: 5896 |
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Extraction | Number tomograms: 756 / Number images used: 10455 |
CTF correction | Software - Name: CTFFIND (ver. 4) / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |