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Yorodumi- EMDB-65778: Cryo-EM structure of the kinesin-2 tail domain in complex with KA... -
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Open data
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Basic information
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| Title | Cryo-EM structure of the kinesin-2 tail domain in complex with KAP3 and APC | |||||||||||||||
Map data | sharpened map | |||||||||||||||
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Keywords | Kinesin-2 motor Intracellular transport Kinesin-adaptor-cargo complex / MOTOR PROTEIN | |||||||||||||||
| Function / homology | Function and homology informationnegative regulation of odontogenesis / axis specification / positive regulation of calcium-dependent cell-cell adhesion / opsin transport / epidermal stem cell homeostasis / positive regulation of axo-dendritic protein transport / positive regulation of establishment or maintenance of cell polarity regulating cell shape / kinesin II complex / : / intraciliary transport particle B binding ...negative regulation of odontogenesis / axis specification / positive regulation of calcium-dependent cell-cell adhesion / opsin transport / epidermal stem cell homeostasis / positive regulation of axo-dendritic protein transport / positive regulation of establishment or maintenance of cell polarity regulating cell shape / kinesin II complex / : / intraciliary transport particle B binding / Apoptotic cleavage of cellular proteins / periciliary membrane compartment / Activation of SMO / anterograde dendritic transport / Beta-catenin phosphorylation cascade / Disassembly of the destruction complex and recruitment of AXIN to the membrane / Intraflagellar transport / nitrogen cycle metabolic process / Deactivation of the beta-catenin transactivating complex / Ovarian tumor domain proteases / regulation of epithelial cell differentiation / centriole-centriole cohesion / protein localization to cell junction / intraciliary transport / Kinesins / anterograde dendritic transport of neurotransmitter receptor complex / microtubule anchoring at centrosome / Degradation of beta-catenin by the destruction complex / negative regulation of cell cycle G1/S phase transition / cilium movement / Scrib-APC-beta-catenin complex / negative regulation of cyclin-dependent protein serine/threonine kinase activity / inner ear receptor cell stereocilium organization / photoreceptor connecting cilium / motile cilium assembly / COPI-dependent Golgi-to-ER retrograde traffic / proximal/distal pattern formation / negative regulation of epithelial cell proliferation involved in prostate gland development / regulation of attachment of spindle microtubules to kinetochore / negative regulation of cardiac muscle cell proliferation / gamma-catenin binding / Hedgehog 'off' state / cilium organization / cell body fiber / positive regulation of pseudopodium assembly / ribbon synapse / metaphase/anaphase transition of mitotic cell cycle / positive regulation of intracellular protein transport / positive regulation of protein localization to centrosome / cell projection membrane / regulation of osteoclast differentiation / negative regulation of microtubule depolymerization / pattern specification process / dentate gyrus development / MHC class II antigen presentation / beta-catenin destruction complex / catenin complex / anterograde axonal transport / protein kinase regulator activity / microtubule plus-end binding / dorsal/ventral pattern formation / non-motile cilium assembly / motile cilium / determination of left/right symmetry / regulation of microtubule-based process / cell fate specification / anterior/posterior pattern specification / neural tube development / neural precursor cell proliferation / protein-containing complex localization / kinesin complex / microtubule motor activity / smoothened signaling pathway / microtubule-based movement / dorsal/ventral neural tube patterning / skin development / spectrin binding / mitotic spindle assembly checkpoint signaling / regulation of osteoblast differentiation / negative regulation of G1/S transition of mitotic cell cycle / stem cell population maintenance / muscle cell cellular homeostasis / positive regulation of cytokinesis / heart looping / ciliary transition zone / forebrain development / neuron projection terminus / establishment or maintenance of cell polarity / negative regulation of Wnt signaling pathway / regulation of cell differentiation / dynein complex binding / mitotic cytokinesis / positive regulation of cell division / somatic stem cell population maintenance / cilium assembly / lateral plasma membrane / epidermis development / hair follicle development / mitotic spindle assembly / chromosome organization Similarity search - Function | |||||||||||||||
| Biological species | ![]() | |||||||||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 2.9 Å | |||||||||||||||
Authors | Jiang X / Danev R / Yanagisawa H / Kikkawa M | |||||||||||||||
| Funding support | Japan, 4 items
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Citation | Journal: Sci Adv / Year: 2025Title: The hook-like adaptor and cargo-binding (HAC) domain in the kinesin-2 tail enables adaptor assembly and cargo recognition. Authors: Xuguang Jiang / Radostin Danev / Sotaro Ichinose / Baichun Niu / Sumio Ohtsuki / Haruaki Yanagisawa / Satoru Nagatoishi / Kouhei Tsumoto / Nobutaka Hirokawa / Masahide Kikkawa / ![]() Abstract: Intracellular transport relies on motor proteins such as kinesins to deliver cargo along microtubules, yet how they recognize cargo remains unclear. Here, we present high-resolution cryo-electron ...Intracellular transport relies on motor proteins such as kinesins to deliver cargo along microtubules, yet how they recognize cargo remains unclear. Here, we present high-resolution cryo-electron microscopy structures of the heterotrimeric kinesin-2 complex (KIF3A/KIF3B/KAP3) bound to the cargo protein APC. Our findings reveal a previously uncharacterized KIF3 tail hook-like motif, termed the "HAC" domain, which mediates binding to both KAP3 adaptor and APC cargo. Within this domain, the KIF3A helical regions ensure cargo specificity, while a β-hairpin and KIF3B provide structural support. Biochemical and neuronal experiments confirm its functional importance. Notably, the HAC/KAP3 structure resembles hook-like architectures seen in kinesin-1 and dynein, suggesting a shared cargo recognition framework. These findings also shed light on kinesin-2 cargo specificity and offer a structural framework for understanding related neuronal transport mechanisms. | |||||||||||||||
| History |
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_65778.map.gz | 13.9 MB | EMDB map data format | |
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| Header (meta data) | emd-65778-v30.xml emd-65778.xml | 31.6 KB 31.6 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_65778_fsc.xml | 5.2 KB | Display | FSC data file |
| Images | emd_65778.png | 69.6 KB | ||
| Filedesc metadata | emd-65778.cif.gz | 8.1 KB | ||
| Others | emd_65778_additional_1.map.gz emd_65778_half_map_1.map.gz emd_65778_half_map_2.map.gz | 7.9 MB 14.5 MB 14.5 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-65778 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-65778 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 9w9iMC ![]() 9w9hC M: atomic model generated by this map C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_65778.map.gz / Format: CCP4 / Size: 15.6 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Annotation | sharpened map | ||||||||||||||||||||||||||||||||||||
| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 1.3 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
-Additional map: raw map
| File | emd_65778_additional_1.map | ||||||||||||
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| Annotation | raw map | ||||||||||||
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| Density Histograms |
-Half map: halfmap2
| File | emd_65778_half_map_1.map | ||||||||||||
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| Annotation | halfmap2 | ||||||||||||
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| Density Histograms |
-Half map: halfmap1
| File | emd_65778_half_map_2.map | ||||||||||||
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| Annotation | halfmap1 | ||||||||||||
| Projections & Slices |
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| Density Histograms |
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Sample components
-Entire : Tetrameric complex of kinesin-2 KIF3A/B/KAP3 and cargo APC
| Entire | Name: Tetrameric complex of kinesin-2 KIF3A/B/KAP3 and cargo APC |
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| Components |
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-Supramolecule #1: Tetrameric complex of kinesin-2 KIF3A/B/KAP3 and cargo APC
| Supramolecule | Name: Tetrameric complex of kinesin-2 KIF3A/B/KAP3 and cargo APC type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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| Source (natural) | Organism: ![]() |
| Molecular weight | Theoretical: 220 KDa |
-Macromolecule #1: Kinesin-like protein KIF3A
| Macromolecule | Name: Kinesin-like protein KIF3A / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO |
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| Source (natural) | Organism: ![]() |
| Molecular weight | Theoretical: 21.084143 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: MGSSHHHHHH SQSLQEEAQG KTKKLKKVWT MLMAAKSEMA DLQQEHQREI EGLLENIRQL SRELRLQMLI IDNFIPQDYQ EMIENYVHW NEDIGEWQLK CVAYTGNNMR KQTPVPDKKE RDPFEVDLSH VYLAYTEESL RQSLMKLERP RTSKGKARPK M GRRKRSAK PETVIDSLLQ UniProtKB: Kinesin-like protein KIF3A |
-Macromolecule #2: Kinesin-like protein KIF3B, N-terminally processed
| Macromolecule | Name: Kinesin-like protein KIF3B, N-terminally processed / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO |
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| Source (natural) | Organism: ![]() |
| Molecular weight | Theoretical: 25.440057 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: MSLQQEVDIK TKKLKKLFSK LQAVKAEIHD LQEEHIKERQ ELEQTQNELT RELKLKHLII ENFIPLEEKN KIMNRSFFDD EEDHWKLHP ITRLENQQMM KRPVSAVGYK RPLSQHARMS MMIRPEPRYR AENIMLLELD MPSRTTRDYE GPAISPKVQA A LDAALQDE ...String: MSLQQEVDIK TKKLKKLFSK LQAVKAEIHD LQEEHIKERQ ELEQTQNELT RELKLKHLII ENFIPLEEKN KIMNRSFFDD EEDHWKLHP ITRLENQQMM KRPVSAVGYK RPLSQHARMS MMIRPEPRYR AENIMLLELD MPSRTTRDYE GPAISPKVQA A LDAALQDE DEIQVDASSF ESTASRKPKA RPKSGRKSGS SSSSSGNPAS QFYPQSRGLV PK UniProtKB: Kinesin-like protein KIF3B |
-Macromolecule #3: Kinesin-associated protein 3
| Macromolecule | Name: Kinesin-associated protein 3 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO |
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| Source (natural) | Organism: ![]() |
| Molecular weight | Theoretical: 80.224148 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: MQGEDARYLK RKVKGGNIDV HPSEKALIVQ YEVEATILGE MGDPMLGERK ECQKIIRLKS LNANTDITSL ARKVVEECKL IHPSKLSEV EQLLYYLQNR RDSLPGKEKK EKSSKPKDPP PFEGMEIDEV ANINDMDEYI ELLYEDIPDK VRGSALILQL A RNPDNLEE ...String: MQGEDARYLK RKVKGGNIDV HPSEKALIVQ YEVEATILGE MGDPMLGERK ECQKIIRLKS LNANTDITSL ARKVVEECKL IHPSKLSEV EQLLYYLQNR RDSLPGKEKK EKSSKPKDPP PFEGMEIDEV ANINDMDEYI ELLYEDIPDK VRGSALILQL A RNPDNLEE LLLNETALGA LARVLREDWK QSVELATNII YIFFCFSSFS HFHGLITHYK IGALCMNIID HELKRHELWQ EE LSKKKKA VDEDLENQTL RKDYDKTFKK YQGLVVKQEQ LLRVALYLLL NLAEDTRTEL KMRNKNIVHM LVKALDRDNF ELL ILVVSF LKKLSIFMEN KNDMVEMDIV EKLVKMIPCE HEDLLNITLR LLLNLSFDTG LRNKMVQVGL LPKLTALLGN ENYK QIAMC VLYHISMDDR FKSMFAYTDC IPQLMKMLFE CSDERIDLEL ISFCINLAAN KRNVQLICEG NGLKMLMKRA LKLKD PLLM KMIRNISQHD GPTKNLFIDY VGDLAAQISS DEEEEFVIEC LGTLANLTIP DLDWELVLKE YKLVPFLKDK LKPGAA EDD LVLEVVIMIG TVSMDDSCAA LLAKSGIIPA LIELLNAQQE DDEFVCQIIY VFYQMVFHQA TRDVIIKETQ APAYLID LM HDKNNEIRKV CDNTLDIIAE YDEEWAKKIQ SEKFRWHNSQ WLEMVESRQL D UniProtKB: Kinesin-associated protein 3 |
-Macromolecule #4: Adenomatous polyposis coli protein
| Macromolecule | Name: Adenomatous polyposis coli protein / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO |
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| Source (natural) | Organism: ![]() |
| Molecular weight | Theoretical: 75.417633 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: MHHHHHHSQD SCISMRQSGC LPLLIQLLHG NDKDSVLLGN SRGSKEARAR ASAALHNIIH SQPDDKRGRR EIRVLHLLEQ IRAYCETCW EWQEAHEQGM DQDKNPMPAP VEHQICPAVC VLMKLSFDEE HRHAMNELGG LQAIAELLQV DCEMYGLTND H YSVTLRRY ...String: MHHHHHHSQD SCISMRQSGC LPLLIQLLHG NDKDSVLLGN SRGSKEARAR ASAALHNIIH SQPDDKRGRR EIRVLHLLEQ IRAYCETCW EWQEAHEQGM DQDKNPMPAP VEHQICPAVC VLMKLSFDEE HRHAMNELGG LQAIAELLQV DCEMYGLTND H YSVTLRRY AGMALTNLTF GDVANKATLC SMKGCMRALV AQLKSESEDL QQVIASVLRN LSWRADVNSK KTLREVGSVK AL MECALEV KKESTLKSVL SALWNLSAHC TENKADICAV DGALAFLVGT LTYRSQTNTL AIIESGGGIL RNVSSLIATN EDH RQILRE NNCLQTLLQH LKSHSLTIVS NACGTLWNLS ARNPKDQEAL WDMGAVSMLK NLIHSKHKMI AMGSAAALRN LMAN RPAKY KDANIMSPGS SLPSLHVRKQ KALEAELDAQ HLSETFDNID NLSPKASHRS KQRHKQNLYG DYAFDANRHD DSRSD NFNT GNMTVLSPYL NTTVLPSSSS SRGSLDSSRS EKDRSLERER GIGLSAYHPT TENAGTSSKR GLQITTTAAQ IAKVME EVS AIHTSQDDRS SASTTEFHCV ADDRSAARRS SASHTHSNTY NFTKSENSNR TCSMPYAKVE YKRSSNDSLN SVTSSDG YG KRGQMKPSVE SYSEDDESKF CSYGQYPADL AHKIHSAN UniProtKB: Adenomatous polyposis coli protein |
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Concentration | 0.0375 mg/mL |
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| Buffer | pH: 8 |
| Grid | Model: Quantifoil R1.2/1.3 / Mesh: 300 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 120 sec. |
| Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 279 K / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy #1
| Microscopy ID | 1 |
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| Microscope | JEOL CRYO ARM 200 |
| Specialist optics | Energy filter - Slit width: 20 eV |
| Image recording | Image recording ID: 1 / Film or detector model: GATAN K3 (6k x 4k) / Digitization - Dimensions - Width: 5760 pixel / Digitization - Dimensions - Height: 4092 pixel / Number grids imaged: 1 / Number real images: 36020 / Average electron dose: 64.7 e/Å2 |
| Electron beam | Acceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | C2 aperture diameter: 50.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 1.55 mm / Nominal defocus max: 1.8 µm / Nominal defocus min: 0.6 µm / Nominal magnification: 80000 |
| Sample stage | Cooling holder cryogen: NITROGEN |
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Electron microscopy #1~
| Microscopy ID | 1 |
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| Microscope | TFS KRIOS |
| Specialist optics | Energy filter - Slit width: 20 eV |
| Image recording | Image recording ID: 2 / Film or detector model: GATAN K3 (6k x 4k) / Digitization - Dimensions - Width: 5760 pixel / Digitization - Dimensions - Height: 4092 pixel / Number grids imaged: 1 / Number real images: 19918 / Average electron dose: 63.0 e/Å2 Details: tilted-stage image collection with tilt angles of 30 and 40 degrees |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | C2 aperture diameter: 50.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 1.6 µm / Nominal defocus min: 1.0 µm / Nominal magnification: 130000 |
| Sample stage | Cooling holder cryogen: NITROGEN |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
| Initial model |
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| Details | Initial local fitting was done using Phenix dock-in-map tool. | |||||||||
| Refinement | Space: REAL / Protocol: OTHER | |||||||||
| Output model | ![]() PDB-9w9i: |
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Keywords
Authors
Japan, 4 items
Citation

















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FIELD EMISSION GUN


