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- EMDB-72560: Tubulin dimer bound to ST-403 -

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Basic information

Entry
Database: EMDB / ID: EMD-72560
TitleTubulin dimer bound to ST-403
Map dataDensity-modified map
Sample
  • Complex: Tubulin dimer bound to ST-403
    • Protein or peptide: Tubulin alpha-1B chain
    • Protein or peptide: Tubulin beta chain
  • Ligand: GUANOSINE-5'-TRIPHOSPHATE
  • Ligand: GUANOSINE-5'-DIPHOSPHATE
  • Ligand: (R)-(9-ethyl-9H-carbazol-3-yl)(quinolin-5-yl)methanol
KeywordsTubulin / microtubule inhibitor / STRUCTURAL PROTEIN
Function / homology
Function and homology information


Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Resolution of Sister Chromatid Cohesion / Hedgehog 'off' state / Cargo trafficking to the periciliary membrane / Intraflagellar transport / COPI-dependent Golgi-to-ER retrograde traffic / Mitotic Prometaphase / Carboxyterminal post-translational modifications of tubulin / RHOH GTPase cycle / EML4 and NUDC in mitotic spindle formation ...Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Resolution of Sister Chromatid Cohesion / Hedgehog 'off' state / Cargo trafficking to the periciliary membrane / Intraflagellar transport / COPI-dependent Golgi-to-ER retrograde traffic / Mitotic Prometaphase / Carboxyterminal post-translational modifications of tubulin / RHOH GTPase cycle / EML4 and NUDC in mitotic spindle formation / Sealing of the nuclear envelope (NE) by ESCRT-III / Kinesins / PKR-mediated signaling / Separation of Sister Chromatids / The role of GTSE1 in G2/M progression after G2 checkpoint / Aggrephagy / RHO GTPases activate IQGAPs / RHO GTPases Activate Formins / HSP90 chaperone cycle for steroid hormone receptors (SHR) in the presence of ligand / MHC class II antigen presentation / Recruitment of NuMA to mitotic centrosomes / COPI-mediated anterograde transport / microtubule-based process / neuron migration / microtubule cytoskeleton organization / structural constituent of cytoskeleton / microtubule cytoskeleton / mitotic cell cycle / neuron differentiation / microtubule / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / GTPase activity / GTP binding
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 beta chain / Tubulin alpha-1B chain
Similarity search - Component
Biological speciesSus scrofa (pig)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.9 Å
AuthorsLynch EM / Stella N / Kollman JM
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R35GM149542 United States
CitationJournal: To Be Published
Title: Tubulin dimer bound to ST-403
Authors: Lynch EM / Stella N / Kollman JM
History
DepositionSep 8, 2025-
Header (metadata) releaseSep 16, 2026-
Map releaseSep 16, 2026-
UpdateSep 16, 2026-
Current statusSep 16, 2026Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_72560.png

Downloads & links

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Map

FileDownload / File: emd_72560.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationDensity-modified map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesX (Sec.)Y (Row.)Z (Col.)
0.89 Å/pix.
x 320 pix.
= 283.2 Å		0.89 Å/pix.
x 320 pix.
= 283.2 Å		0.89 Å/pix.
x 320 pix.
= 283.2 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.885 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 1.45
Minimum - Maximum-12.113401 - 18.661587000000001
Average (Standard dev.)-0.000007344682 (±0.2223341)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderZYX
Origin000
Dimensions320320320
Spacing320320320
CellA=B=C: 283.2 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: B-factor sharpened map

Fileemd_72560_additional_1.map
AnnotationB-factor sharpened map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_72560_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_72560_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Tubulin dimer bound to ST-403

EntireName: Tubulin dimer bound to ST-403
Components
  • Complex: Tubulin dimer bound to ST-403
    • Protein or peptide: Tubulin alpha-1B chain
    • Protein or peptide: Tubulin beta chain
  • Ligand: GUANOSINE-5'-TRIPHOSPHATE
  • Ligand: GUANOSINE-5'-DIPHOSPHATE
  • Ligand: (R)-(9-ethyl-9H-carbazol-3-yl)(quinolin-5-yl)methanol

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Supramolecule #1: Tubulin dimer bound to ST-403

SupramoleculeName: Tubulin dimer bound to ST-403 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2
Source (natural)Organism: Sus scrofa (pig)

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Macromolecule #1: Tubulin alpha-1B chain

MacromoleculeName: Tubulin alpha-1B chain / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Sus scrofa (pig)
Molecular weightTheoretical: 50.204445 KDa
SequenceString: MRECISIHVG QAGVQIGNAC WELYCLEHGI QPDGQMPSDK TIGGGDDSFN TFFSETGAGK HVPRAVFVDL EPTVIDEVRT GTYRQLFHP EQLITGKEDA ANNYARGHYT IGKEIIDLVL DRIRKLADQC TGLQGFLVFH SFGGGTGSGF TSLLMERLSV D YGKKSKLE ...String:
MRECISIHVG QAGVQIGNAC WELYCLEHGI QPDGQMPSDK TIGGGDDSFN TFFSETGAGK HVPRAVFVDL EPTVIDEVRT GTYRQLFHP EQLITGKEDA ANNYARGHYT IGKEIIDLVL DRIRKLADQC TGLQGFLVFH SFGGGTGSGF TSLLMERLSV D YGKKSKLE FSIYPAPQVS TAVVEPYNSI LTTHTTLEHS DCAFMVDNEA IYDICRRNLD IERPTYTNLN RLISQIVSSI TA SLRFDGA LNVDLTEFQT NLVPYPRIHF PLATYAPVIS AEKAYHEQLS VAEITNACFE PANQMVKCDP RHGKYMACCL LYR GDVVPK DVNAAIATIK TKRSIQFVDW CPTGFKVGIN YQPPTVVPGG DLAKVQRAVC MLSNTTAIAE AWARLDHKFD LMYA KRAFV HWYVGEGMEE GEFSEAREDM AALEKDYEEV GVDSVEGEGE EEGEEY

UniProtKB: Tubulin alpha-1B 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: Sus scrofa (pig)
Molecular weightTheoretical: 49.90777 KDa
SequenceString: MREIVHIQAG QCGNQIGAKF WEVISDEHGI DPTGSYHGDS DLQLERINVY YNEAAGNKYV PRAILVDLEP GTMDSVRSGP FGQIFRPDN FVFGQSGAGN NWAKGHYTEG AELVDSVLDV VRKESESCDC LQGFQLTHSL GGGTGSGMGT LLISKIREEY P DRIMNTFS ...String:
MREIVHIQAG QCGNQIGAKF WEVISDEHGI DPTGSYHGDS DLQLERINVY YNEAAGNKYV PRAILVDLEP GTMDSVRSGP FGQIFRPDN FVFGQSGAGN NWAKGHYTEG AELVDSVLDV VRKESESCDC LQGFQLTHSL GGGTGSGMGT LLISKIREEY P DRIMNTFS VVPSPKVSDT VVEPYNATLS VHQLVENTDE TYCIDNEALY DICFRTLKLT TPTYGDLNHL VSATMSGVTT CL RFPGQLN ADLRKLAVNM VPFPRLHFFM PGFAPLTSRG SQQYRALTVP ELTQQMFDAK NMMAACDPRH GRYLTVAAVF RGR MSMKEV DEQMLNVQNK NSSYFVEWIP NNVKTAVCDI PPRGLKMSAT FIGNSTAIQE LFKRISEQFT AMFRRKAFLH WYTG EGMDE MEFTEAESNM NDLVSEYQQY QDATADEQGE FEEEGEEDEA

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: GUANOSINE-5'-DIPHOSPHATE

MacromoleculeName: GUANOSINE-5'-DIPHOSPHATE / type: ligand / ID: 4 / 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 #5: (R)-(9-ethyl-9H-carbazol-3-yl)(quinolin-5-yl)methanol

MacromoleculeName: (R)-(9-ethyl-9H-carbazol-3-yl)(quinolin-5-yl)methanol / type: ligand / ID: 5 / Number of copies: 1 / Formula: A1CSU
Molecular weightTheoretical: 352.428 Da

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.5 / Details: RM100
GridMaterial: NICKEL/TITANIUM
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeTFS GLACIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Number real images: 9006 / Average electron dose: 60.0 e/Å2
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.7000000000000001 µm
Sample stageCooling holder cryogen: NITROGEN

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Image processing

Particle selectionNumber selected: 12278517
CTF correctionSoftware - Name: cryoSPARC / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: OTHER / Details: Ab-initio reconstruction from cryoSPARC
Final reconstructionNumber classes used: 1 / Algorithm: BACK PROJECTION / Resolution.type: BY AUTHOR / Resolution: 3.9 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION / Number images used: 120540
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION
Final 3D classificationNumber classes: 5 / Software - Name: RELION
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

7yso


Chain - Source name: PDB / Chain - Initial model type: experimental model
RefinementSpace: REAL / Protocol: FLEXIBLE FIT
Output model

PDB-9y6f:
Tubulin dimer bound to ST-403

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