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Open data
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Basic information
| Entry | Database: PDB / ID: 8qat | |||||||||
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| Title | Cryo-EM structure of Fts-Hook3-FHIP1B at 3.2 A resolution. | |||||||||
Components |
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Keywords | PROTEIN TRANSPORT / motor proteins / molecular motors / cargo adaptors / bidirectional transport / microtubules / cytoskeleton. | |||||||||
| Function / homology | Function and homology informationFHF complex / interkinetic nuclear migration / Golgi localization / protein localization to perinuclear region of cytoplasm / microtubule anchoring at centrosome / dynein light chain binding / cytoskeleton-dependent intracellular transport / neuronal stem cell population maintenance / early endosome to late endosome transport / endosome organization ...FHF complex / interkinetic nuclear migration / Golgi localization / protein localization to perinuclear region of cytoplasm / microtubule anchoring at centrosome / dynein light chain binding / cytoskeleton-dependent intracellular transport / neuronal stem cell population maintenance / early endosome to late endosome transport / endosome organization / cis-Golgi network / protein localization to centrosome / DNA damage tolerance / dynein light intermediate chain binding / lysosome organization / endosome to lysosome transport / pericentriolar material / dynein intermediate chain binding / ubiquitin conjugating enzyme activity / dynactin binding / protein K63-linked ubiquitination / positive regulation of protein binding / cytoplasmic microtubule organization / negative regulation of neurogenesis / centriolar satellite / positive regulation of protein phosphorylation / protein transport / microtubule binding / microtubule / apoptotic process / centrosome / identical protein binding / nucleus / plasma membrane / cytoplasm Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å | |||||||||
Authors | Abid Ali, F. / Carter, A.P. | |||||||||
| Funding support | United Kingdom, 2items
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Citation | Journal: Nat Struct Mol Biol / Year: 2025Title: KIF1C activates and extends dynein movement through the FHF cargo adapter. Authors: Ferdos Abid Ali / Alexander J Zwetsloot / Caroline E Stone / Tomos E Morgan / Richard F Wademan / Andrew P Carter / Anne Straube / ![]() Abstract: Cellular cargos move bidirectionally on microtubules by recruiting opposite polarity motors dynein and kinesin. These motors show codependence, where one requires the activity of the other, although ...Cellular cargos move bidirectionally on microtubules by recruiting opposite polarity motors dynein and kinesin. These motors show codependence, where one requires the activity of the other, although the mechanism is unknown. Here we show that kinesin-3 KIF1C acts as both an activator and a processivity factor for dynein, using in vitro reconstitutions of human proteins. Activation requires only a fragment of the KIF1C nonmotor stalk binding the cargo adapter HOOK3. The interaction site is separate from the constitutive factors FTS and FHIP, which link HOOK3 to small G-proteins on cargos. We provide a structural model for the autoinhibited FTS-HOOK3-FHIP1B (an FHF complex) and explain how KIF1C relieves it. Collectively, we explain codependency by revealing how mutual activation of dynein and kinesin occurs through their shared adapter. Many adapters bind both dynein and kinesins, suggesting this mechanism could be generalized to other bidirectional complexes. | |||||||||
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Structure visualization
| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 8qat.cif.gz | 210.8 KB | Display | PDBx/mmCIF format |
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| PDB format | pdb8qat.ent.gz | 161 KB | Display | PDB format |
| PDBx/mmJSON format | 8qat.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/qa/8qat ftp://data.pdbj.org/pub/pdb/validation_reports/qa/8qat | HTTPS FTP |
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-Related structure data
| Related structure data | ![]() 18302MC M: map data used to model this data C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
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Assembly
| Deposited unit | ![]()
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Components
| #1: Protein | Mass: 17394.662 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: HOOK3 / Production host: ![]() #2: Protein | | Mass: 105642.320 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: FHIP1B / Production host: ![]() #3: Protein | | Mass: 33173.977 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: AKTIP / Production host: ![]() Has protein modification | N | |
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-Experimental details
-Experiment
| Experiment | Method: ELECTRON MICROSCOPY |
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| EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
| Component | Name: The Fts-Hook3-FHIP1B complex / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT |
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| Molecular weight | Value: 0.305 MDa / Experimental value: YES |
| Source (natural) | Organism: Homo sapiens (human) |
| Source (recombinant) | Organism: ![]() |
| Buffer solution | pH: 7.2 |
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
| Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE |
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Electron microscopy imaging
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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| Microscopy | Model: FEI TITAN KRIOS |
| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 26000 nm / Nominal defocus min: 16000 nm |
| Image recording | Electron dose: 43.6 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
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Processing
| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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| 3D reconstruction | Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 273204 / Algorithm: FOURIER SPACE / Symmetry type: POINT |
| Atomic model building | Protocol: OTHER / Space: REAL |
| Atomic model building | Details: Initial model based on alphafold prediction of FHF / Source name: AlphaFold / Type: in silico model |
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About Yorodumi




Homo sapiens (human)
United Kingdom, 2items
Citation

PDBj



light scattering

