4YJ3

Crystal structure of tubulin bound to compound 2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.75 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.243 

wwPDB Validation   3D Report Full Report


This is version 1.3 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:  
    4YJ2, 4YJ3

  • 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-181 as a potent mitotic inhibitor with heightened activity towards melanomas ...

    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

    Jonsson Comprehensive Cancer Center, University of California, Los Angeles, Los Angeles, California, 90095.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Tubulin alpha-1B chainA, C451Bos taurusMutation(s): 0 
Find proteins for P81947 (Bos taurus)
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Go to UniProtKB:  P81947
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Tubulin beta-2B chainB, D445Bos taurusMutation(s): 0 
Gene Names: TUBB2B
Find proteins for Q6B856 (Bos taurus)
Explore Q6B856 
Go to UniProtKB:  Q6B856
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Stathmin-4E143Rattus norvegicusMutation(s): 1 
Gene Names: Stmn4
Find proteins for P63043 (Rattus norvegicus)
Explore P63043 
Go to UniProtKB:  P63043
Protein Feature View
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Tubulin-tyrosine ligaseF384Gallus gallusMutation(s): 0 
Gene Names: TTL
Find proteins for E1BQ43 (Gallus gallus)
Explore E1BQ43 
Go to UniProtKB:  E1BQ43
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 7 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GTP
Query on GTP

Download Ideal Coordinates CCD File 
H [auth A], P [auth C]GUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O14 P3
XKMLYUALXHKNFT-UUOKFMHZSA-N
 Ligand Interaction
GDP
Query on GDP

Download Ideal Coordinates CCD File 
J [auth B], S [auth D]GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
 Ligand Interaction
4EE
Query on 4EE

Download Ideal Coordinates CCD File 
L [auth B], U [auth D]6-(4-ethoxyphenyl)-3-(2-methoxyphenyl)-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazine
C19 H18 N4 O2 S
YARXQDMQMCNVMB-UHFFFAOYSA-N
 Ligand Interaction
MES
Query on MES

Download Ideal Coordinates CCD File 
N [auth B]2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
 Ligand Interaction
IMD
Query on IMD

Download Ideal Coordinates CCD File 
R [auth C]IMIDAZOLE
C3 H5 N2
RAXXELZNTBOGNW-UHFFFAOYSA-O
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
I [auth A], M [auth B], Q [auth C]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
G [auth A], K [auth B], O [auth C], T [auth D]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.75 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.243 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.2α = 90
b = 157.69β = 90
c = 181.92γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XSCALEdata scaling
PHASERphasing
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Center for Advancing Translational Sciences (NIH/NCATS)United StatesUL1TR000124

Revision History  (Full details and data files)

  • Version 1.0: 2015-05-27
    Type: Initial release
  • Version 1.1: 2015-07-01
    Changes: Database references
  • Version 1.2: 2017-09-20
    Changes: Author supporting evidence, Database references, Derived calculations, Source and taxonomy
  • Version 1.3: 2019-12-04
    Changes: Author supporting evidence