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- EMDB-24066: 16-nm repeat microtubule doublet -

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Basic information

Entry
Database: EMDB / ID: EMD-24066
Title16-nm repeat microtubule doublet
Map data
Sample
  • Complex: 16-nm repeat microtubule doublet
    • Protein or peptide: Tubulin alpha chain
    • Protein or peptide: Tubulin beta chain
  • Ligand: GUANOSINE-5'-TRIPHOSPHATE
  • Ligand: MAGNESIUM ION
  • Ligand: GUANOSINE-5'-DIPHOSPHATE
  • Ligand: water
Keywordsmicrotubule doublet / STRUCTURAL PROTEIN
Function / homology
Function and homology information


structural constituent of cytoskeleton / microtubule cytoskeleton organization / mitotic cell cycle / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / microtubule / hydrolase activity / GTPase activity / GTP binding / metal ion binding / cytoplasm
Similarity search - Function
Alpha tubulin / Tubulin-beta mRNA autoregulation signal. / Beta tubulin, autoregulation binding site / Beta tubulin / Tubulin / Tubulin, C-terminal / Tubulin C-terminal domain / Tubulin, conserved site / Tubulin subunits alpha, beta, and gamma signature. / Tubulin/FtsZ family, C-terminal domain ...Alpha tubulin / Tubulin-beta mRNA autoregulation signal. / Beta tubulin, autoregulation binding site / Beta tubulin / Tubulin / Tubulin, C-terminal / Tubulin C-terminal domain / Tubulin, conserved site / Tubulin subunits alpha, beta, and gamma signature. / Tubulin/FtsZ family, C-terminal domain / Tubulin/FtsZ-like, C-terminal domain / Tubulin/FtsZ, C-terminal / Tubulin/FtsZ, 2-layer sandwich domain / Tubulin/FtsZ family, GTPase domain / Tubulin/FtsZ family, GTPase domain / Tubulin/FtsZ, GTPase domain / Tubulin/FtsZ, GTPase domain superfamily
Similarity search - Domain/homology
Tubulin alpha chain / Tubulin beta chain
Similarity search - Component
Biological speciesTetrahymena thermophila (eukaryote)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.5 Å
AuthorsRao Q / Zhang K
CitationJournal: Nat Struct Mol Biol / Year: 2021
Title: Structures of outer-arm dynein array on microtubule doublet reveal a motor coordination mechanism.
Authors: Qinhui Rao / Long Han / Yue Wang / Pengxin Chai / Yin-Wei Kuo / Renbin Yang / Fangheng Hu / Yuchen Yang / Jonathon Howard / Kai Zhang /
Abstract: Thousands of outer-arm dyneins (OADs) are arrayed in the axoneme to drive a rhythmic ciliary beat. Coordination among multiple OADs is essential for generating mechanical forces to bend microtubule ...Thousands of outer-arm dyneins (OADs) are arrayed in the axoneme to drive a rhythmic ciliary beat. Coordination among multiple OADs is essential for generating mechanical forces to bend microtubule doublets (MTDs). Using electron microscopy, we determined high-resolution structures of Tetrahymena thermophila OAD arrays bound to MTDs in two different states. OAD preferentially binds to MTD protofilaments with a pattern resembling the native tracks for its distinct microtubule-binding domains. Upon MTD binding, free OADs are induced to adopt a stable parallel conformation, primed for array formation. Extensive tail-to-head (TTH) interactions between OADs are observed, which need to be broken for ATP turnover by the dynein motor. We propose that OADs in an array sequentially hydrolyze ATP to slide the MTDs. ATP hydrolysis in turn relaxes the TTH interfaces to effect free nucleotide cycles of downstream OADs. These findings lead to a model explaining how conformational changes in the axoneme produce coordinated action of dyneins.
History
DepositionMay 17, 2021-
Header (metadata) releaseSep 29, 2021-
Map releaseSep 29, 2021-
UpdateMay 29, 2024-
Current statusMay 29, 2024Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.3
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.3
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7mwg
  • Surface level: 0.5
  • Imaged by UCSF Chimera
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  • Simplified surface model + fitted atomic model
  • Atomic modelsPDB-7mwg
  • Imaged by Jmol
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_24066.png

Downloads & links

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Map

FileDownload / File: emd_24066.map.gz / Format: CCP4 / Size: 506 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.33 Å/pix.
x 510 pix.
= 679.83 Å		1.33 Å/pix.
x 510 pix.
= 679.83 Å		1.33 Å/pix.
x 510 pix.
= 679.83 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.333 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.3 / Movie #1: 0.3
Minimum - Maximum-0.6287696 - 1.8370537
Average (Standard dev.)0.012385732 (±0.11896976)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions510510510
Spacing510510510
CellA=B=C: 679.8297 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.3331.3331.333
M x/y/z510510510
origin x/y/z0.0000.0000.000
length x/y/z679.830679.830679.830
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ256256256
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS510510510
D min/max/mean-0.6291.8370.012

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Supplemental data

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Sample components

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Entire : 16-nm repeat microtubule doublet

EntireName: 16-nm repeat microtubule doublet
Components
  • Complex: 16-nm repeat microtubule doublet
    • Protein or peptide: Tubulin alpha chain
    • Protein or peptide: Tubulin beta chain
  • Ligand: GUANOSINE-5'-TRIPHOSPHATE
  • Ligand: MAGNESIUM ION
  • Ligand: GUANOSINE-5'-DIPHOSPHATE
  • Ligand: water

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Supramolecule #1: 16-nm repeat microtubule doublet

SupramoleculeName: 16-nm repeat microtubule doublet / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2
Source (natural)Organism: Tetrahymena thermophila (eukaryote)

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Macromolecule #1: Tubulin alpha chain

MacromoleculeName: Tubulin alpha chain / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Tetrahymena thermophila (eukaryote)
Molecular weightTheoretical: 49.639035 KDa
SequenceString: MREVISIHVG QGGIQVGNAC WELFCLEHGI QPDGQMPSDK TIGGGDDAFN TFFSETGAGK HVPRAVFLDL EPTVIDEVRT GTYRQLFHP EQLISGKEDA ANNFARGHYT IGKEIVDLCL DRIRKLADNC TGLQGFLVFN SVGGGTGSGL GSLLLERLSV D YGKKSKLG ...String:
MREVISIHVG QGGIQVGNAC WELFCLEHGI QPDGQMPSDK TIGGGDDAFN TFFSETGAGK HVPRAVFLDL EPTVIDEVRT GTYRQLFHP EQLISGKEDA ANNFARGHYT IGKEIVDLCL DRIRKLADNC TGLQGFLVFN SVGGGTGSGL GSLLLERLSV D YGKKSKLG FTIYPSPQVS TAVVEPYNSI LSTHSLLEHT DVAVMLDNEA IYDICRRNLD IERPTYTNLN RLIAQVISSL TA SLRFDGA LNVDITEFQT NLVPYPRIHF MLSSYAPIIS AEKAYHEQLS VAEITNSAFE PANMMAKCDP RHGKYMACSM MYR GDVVPK DVNASIATIK TKRTIQFVDW CPTGFKVGIN YQPPTVVPGG DLAKVMRAVC MISNSTAIAE VFSRLDHKFD LMYA KRAFV HWYVGEGMEE GEFSEAREDL AALEKDYEEV GIETAEGEGE EEGY

UniProtKB: Tubulin alpha chain

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Macromolecule #2: Tubulin beta chain

MacromoleculeName: Tubulin beta chain / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Tetrahymena thermophila (eukaryote)
Molecular weightTheoretical: 49.617676 KDa
SequenceString: MREIVHIQGG QCGNQIGAKF WEVISDEHGI DPTGTYHGDS DLQLERINVY YNEATGGRYV PRAILMDLEP GTMDSVRAGP FGQLFRPDN FVFGQTGAGN NWAKGHYTEG AELIDSVLDV VRKEAEGCDC LQGFQITHSL GGGTGSGMGT LLISKVREEY P DRIMETFS ...String:
MREIVHIQGG QCGNQIGAKF WEVISDEHGI DPTGTYHGDS DLQLERINVY YNEATGGRYV PRAILMDLEP GTMDSVRAGP FGQLFRPDN FVFGQTGAGN NWAKGHYTEG AELIDSVLDV VRKEAEGCDC LQGFQITHSL GGGTGSGMGT LLISKVREEY P DRIMETFS VVPSPKVSDT VVEPYNATLS VHQLVENADE CMVIDNEALY DICFRTLKLT TPTYGDLNHL VSAAMSGVTC CL RFPGQLN SDLRKLAVNL IPFPRLHFFM IGFAPLTSRG SQQYRALTVP ELTQQMFDAK NMMCAADPRH GRYLTASALF RGR MSTKEV DEQMLNVQNK NSSYFVEWIP NNIKSSICDI PPKGLKMAVT FVGNSTAIQE MFKRVAEQFT AMFRRKAFLH WYTG EGMDE MEFTEAESNM NDLVSEYQQY QDATAEEEGE FEEEEGEN

UniProtKB: Tubulin beta chain

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Macromolecule #3: GUANOSINE-5'-TRIPHOSPHATE

MacromoleculeName: GUANOSINE-5'-TRIPHOSPHATE / type: ligand / ID: 3 / Number of copies: 1 / Formula: GTP
Molecular weightTheoretical: 523.18 Da
Chemical component information

ChemComp-GTP:
GUANOSINE-5'-TRIPHOSPHATE / GTP, energy-carrying molecule*YM

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Macromolecule #4: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 4 / Number of copies: 1 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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Macromolecule #5: GUANOSINE-5'-DIPHOSPHATE

MacromoleculeName: GUANOSINE-5'-DIPHOSPHATE / type: ligand / ID: 5 / Number of copies: 1 / Formula: GDP
Molecular weightTheoretical: 443.201 Da
Chemical component information

ChemComp-GDP:
GUANOSINE-5'-DIPHOSPHATE / GDP, energy-carrying molecule*YM

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Macromolecule #6: water

MacromoleculeName: water / type: ligand / ID: 6 / Number of copies: 9 / Formula: HOH
Molecular weightTheoretical: 18.015 Da
Chemical component information

ChemComp-HOH:
WATER

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation statefilament

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Sample preparation

BufferpH: 7.4
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K2 QUANTUM (4k x 4k) / Average electron dose: 53.3 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

6u0h

Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 118333
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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