5YLJ

Crystal structure of T2R-TTL-Millepachine complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The compound millepachine and its derivatives inhibit tubulin polymerization by irreversibly binding to the colchicine-binding site in beta-tubulin.

Yang, J.H.Yan, W.Yu, Y.M.Wang, Y.X.Yang, T.Xue, L.L.Yuan, X.Long, C.F.Liu, Z.W.Chen, X.X.Hu, M.S.Zheng, L.Qiu, Q.Pei, H.Y.Li, D.Wang, F.Bai, P.Wen, J.L.Ye, H.Y.Chen, L.J.

(2018) J. Biol. Chem. 293: 9461-9472

  • DOI: 10.1074/jbc.RA117.001658
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Inhibitors that bind to the paclitaxel- or vinblastine-binding sites of tubulin have been part of the pharmacopoeia of anticancer therapy for decades. However, tubulin inhibitors that bind to the colchicine-binding site are not used in clinical cance ...

    Inhibitors that bind to the paclitaxel- or vinblastine-binding sites of tubulin have been part of the pharmacopoeia of anticancer therapy for decades. However, tubulin inhibitors that bind to the colchicine-binding site are not used in clinical cancer therapy, because of their low therapeutic index. To address multidrug resistance to many conventional tubulin-binding agents, numerous efforts have attempted to clinically develop inhibitors that bind the colchicine-binding site. Previously, we have found that millepachine (MIL), a natural chalcone-type small molecule extracted from the plant Millettia pachycarpa , and its two derivatives (MDs) SKLB028 and SKLB050 have potential antitumor activities both in vitro and in vivo However, their cellular targets and mechanisms are unclear. Here, biochemical and cellular experiments revealed that the MDs directly and irreversibly bind β-tubulin. X-ray crystallography of the tubulin-MD structures disclosed that the MDs bind at the tubulin intradimer interface and to the same site as colchicine and that their binding mode is similar to that of colchicine. Of note, MDs inhibited tubulin polymerization and caused G 2 /M cell-cycle arrest. Comprehensive analysis further revealed that free MIL exhibits an s- cis conformation, whereas MIL in the colchicine-binding site in tubulin adopts an s- trans conformation. Moreover, introducing an α-methyl to MDs to increase the proportion of s- trans conformations augmented MDs' tubulin inhibition activity. Our study uncovers a new class of chalcone-type tubulin inhibitors that bind the colchicine-binding site in β-tubulin and suggests that the s- trans conformation of these compounds may make them more active anticancer agents.


    Organizational Affiliation

    the Guangdong Zhongsheng Pharmaceutical Co., Ltd., Dongguan, Guangdong 523325, China.,From the State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu 610041, China and.,From the State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu 610041, China and chenlijuan125@163.com.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tubulin alpha-1B chain
A, C
451Sus scrofaMutation(s): 0 
Gene Names: TUBA1B
Find proteins for Q2XVP4 (Sus scrofa)
Go to Gene View: TUBA1B
Go to UniProtKB:  Q2XVP4
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Tubulin beta chain
B, D
445Sus scrofaMutation(s): 0 
Find proteins for P02554 (Sus scrofa)
Go to UniProtKB:  P02554
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Stathmin-4
E
143Rattus norvegicusMutation(s): 0 
Gene Names: Stmn4
Find proteins for P63043 (Rattus norvegicus)
Go to UniProtKB:  P63043
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Tubulin tyrosine ligase
F
384Gallus gallusMutation(s): 0 
Gene 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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B
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
 Ligand Interaction
GTP
Query on GTP

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

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A, C
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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A, B, C, D
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
8X0
Query on 8X0

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B, D
(E)-1-(5-methoxy-2,2-dimethyl-chromen-8-yl)-3-(4-methoxyphenyl)prop-2-en-1-one
C22 H22 O4
GZUOKKIDYHPTAZ-YRNVUSSQSA-N
 Ligand Interaction
MES
Query on MES

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B
2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
 Ligand Interaction
ACP
Query on ACP

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Download CCD File 
F
PHOSPHOMETHYLPHOSPHONIC ACID ADENYLATE ESTER
ADENOSINE-5'-[BETA, GAMMA-METHYLENE]TRIPHOSPHATE
C11 H18 N5 O12 P3
UFZTZBNSLXELAL-IOSLPCCCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.216 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 105.231α = 90.00
b = 157.367β = 90.00
c = 182.684γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
HKL-3000data reduction
HKL-3000data scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2017-10-17 
  • Released Date: 2018-04-11 
  • Deposition Author(s): Yang, J.H., Chen, L.J.

Revision History 

  • Version 1.0: 2018-04-11
    Type: Initial release
  • Version 1.1: 2018-07-11
    Type: Data collection, Database references