4YJ2

Crystal structure of tubulin bound to MI-181


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.188 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structures of potent anticancer compounds bound to tubulin.

McNamara, D.E.Senese, S.Yeates, T.O.Torres, J.Z.

(2015) Protein Sci. 24: 1164-1172

  • DOI: 10.1002/pro.2704
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Small molecules that bind to tubulin exert powerful effects on cell division and apoptosis (programmed cell death). Cell-based high-throughput screening combined with chemo/bioinformatic and biochemical analyses recently revealed a novel compound MI- ...

    Small molecules that bind to tubulin exert powerful effects on cell division and apoptosis (programmed cell death). Cell-based high-throughput screening combined with chemo/bioinformatic and biochemical analyses recently revealed a novel compound MI-181 as a potent mitotic inhibitor with heightened activity towards melanomas. MI-181 causes tubulin depolymerization, activates the spindle assembly checkpoint arresting cells in mitosis, and induces apoptotic cell death. C2 is an unrelated compound previously shown to have lethal effects on microtubules in tumorigenic cell lines. We report 2.60 Å and 3.75 Å resolution structures of MI-181 and C2, respectively, bound to a ternary complex of αβ-tubulin, the tubulin-binding protein stathmin, and tubulin tyrosine ligase. In the first of these structures, our crystallographic results reveal a unique binding mode for MI-181 extending unusually deep into the well-studied colchicine-binding site on β-tubulin. In the second structure the C2 compound occupies the colchicine-binding site on β-tubulin with two chemical moieties recapitulating contacts made by colchicine, in combination with another system of atomic contacts. These insights reveal the source of the observed effects of MI-181 and C2 on microtubules, mitosis, and cultured cancer cell lines. The structural details of the interaction between tubulin and the described compounds may guide the development of improved derivative compounds as therapeutic candidates or molecular probes to study cancer cell division.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California, 90095.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tubulin alpha-1B chain
A, C
451Bos taurus
Find proteins for P81947 (Bos taurus)
Go to UniProtKB:  P81947
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Tubulin beta-2B chain
B, D
445Bos taurusGene Names: TUBB2B
Find proteins for Q6B856 (Bos taurus)
Go to Gene View: TUBB2B
Go to UniProtKB:  Q6B856
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Stathmin-4
E
143Rattus norvegicusMutations: W18F
Gene Names: Stmn4
Find proteins for P63043 (Rattus norvegicus)
Go to UniProtKB:  P63043
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Tubulin-tyrosine ligase
F
384Gallus gallusGene Names: TTL
Find proteins for E1BQ43 (Gallus gallus)
Go to Gene View: TTL
Go to UniProtKB:  E1BQ43
Small Molecules
Ligands 8 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP

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Download CCD File 
B, D
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
 Ligand Interaction
4ED
Query on 4ED

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Download CCD File 
B, D
5,6-dimethyl-2-[(E)-2-(pyridin-3-yl)ethenyl]-1,3-benzothiazole
C16 H14 N2 S
RPEVBUFPLMBCTD-AATRIKPKSA-N
 Ligand Interaction
GTP
Query on GTP

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Download CCD File 
A, C
GUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O14 P3
XKMLYUALXHKNFT-UUOKFMHZSA-N
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
A, B, C, D
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

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Download CCD File 
A, B, C
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A, B, C, D
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
IMD
Query on IMD

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Download CCD File 
C
IMIDAZOLE
C3 H5 N2
RAXXELZNTBOGNW-UHFFFAOYSA-O
 Ligand Interaction
MES
Query on MES

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Download CCD File 
B
2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.188 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 104.830α = 90.00
b = 157.650β = 90.00
c = 181.030γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
PDB_EXTRACTdata extraction
PHENIXrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationCountryGrant Number
National Institutes of Health/National Center for Advancing Translational SciencesUnited StatesUL1TR000124

Revision History 

  • Version 1.0: 2015-05-27
    Type: Initial release
  • Version 1.1: 2015-07-01
    Type: Database references
  • Version 1.2: 2017-09-20
    Type: Author supporting evidence, Database references, Derived calculations, Source and taxonomy