Structure of PDB 4o2b Chain B Binding Site BS02

Receptor Information
>4o2b Chain B (length=422) Species: 9913 (Bos taurus) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
MREIVHIQAGQCGNQIGAKFWEVISDEHGIDPTGSYHGDSDLQLERINVY
YNEATGNKYVPRAILVDLEPGTMDSVRSGPFGQIFRPDNFVFGQSGAGNN
WAKGHYTEGAELVDSVLDVVRKESESCDCLQGFQLTHSLGGGTGSGMGTL
LISKIREEYPDRIMNTFSVMPSPKVSDTVVEPYNATLSVHQLVENTDETY
CIDNEALYDICFRTLKLTTPTYGDLNHLVSATMSGVTTCLRFPGQLNADL
RKLAVNMVPFPRLHFFMPGFAPLQYRALTVPELTQQMFDSKNMMAACDPR
HGRYLTVAAIFRGRMSMKEVDEQMLNVQNKNSSYFVEWIPNNVKTAVCDI
PPRGLKMSATFIGNSTAIQELFKRISEQFTAMFRRKAFLHWYTGEGMDEM
EFTEAESNMNDLVSEYQQYQDA
Ligand information
Ligand IDLOC
InChIInChI=1S/C22H25NO6/c1-12(24)23-16-8-6-13-10-19(27-3)21(28-4)22(29-5)20(13)14-7-9-18(26-2)17(25)11-15(14)16/h7,9-11,16H,6,8H2,1-5H3,(H,23,24)/t16-/m0/s1
InChIKeyIAKHMKGGTNLKSZ-INIZCTEOSA-N
SMILES
SoftwareSMILES
ACDLabs 10.04O=C(NC3C1=CC(=O)C(OC)=CC=C1c2c(cc(OC)c(OC)c2OC)CC3)C
OpenEye OEToolkits 1.5.0CC(=O)NC1CCc2cc(c(c(c2C3=CC=C(C(=O)C=C13)OC)OC)OC)OC
OpenEye OEToolkits 1.5.0CC(=O)N[C@H]1CCc2cc(c(c(c2C3=CC=C(C(=O)C=C13)OC)OC)OC)OC
CACTVS 3.341COC1=CC=C2C(=CC1=O)[CH](CCc3cc(OC)c(OC)c(OC)c23)NC(C)=O
CACTVS 3.341COC1=CC=C2C(=CC1=O)[C@H](CCc3cc(OC)c(OC)c(OC)c23)NC(C)=O
FormulaC22 H25 N O6
NameN-[(7S)-1,2,3,10-tetramethoxy-9-oxo-6,7-dihydro-5H-benzo[d]heptalen-7-yl]ethanamide;
COLCHICINE
ChEMBLCHEMBL107
DrugBankDB01394
ZINCZINC000000621853
PDB chain4o2b Chain B Residue 503 [Download ligand structure] [Download structure with residue number starting from 1] [View ligand structure]
Receptor-Ligand Complex Structure
Global viewLocal viewStructure summary

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PDB4o2b The Novel Microtubule-Destabilizing Drug BAL27862 Binds to the Colchicine Site of Tubulin with Distinct Effects on Microtubule Organization.
Resolution2.3 Å
Binding residue
(original residue number in PDB)		L248 A250 K254 L255 N258 M259 I318 K352
Binding residue
(residue number reindexed from 1)		L246 A248 K252 L253 N256 M257 I310 K344
Annotation score1
Binding affinityMOAD: Ki=1.8uM
PDBbind-CN: -logKd/Ki=5.74,Ki=1.8uM
BindingDB: IC50=800nM,Ki=780nM
Enzymatic activity
Enzyme Commision number ?
Gene Ontology
Molecular Function
GO:0003924 GTPase activity
GO:0005200 structural constituent of cytoskeleton
GO:0005525 GTP binding
GO:0046872 metal ion binding
GO:0046982 protein heterodimerization activity
Biological Process
GO:0000226 microtubule cytoskeleton organization
GO:0000278 mitotic cell cycle
GO:0007017 microtubule-based process
GO:0007399 nervous system development
GO:1902669 positive regulation of axon guidance
Cellular Component
GO:0005737 cytoplasm
GO:0005856 cytoskeleton
GO:0005874 microtubule
GO:0015630 microtubule cytoskeleton

View graph for
Molecular Function
View graph for
Biological Process
View graph for
Cellular Component
External links
PDB RCSB:4o2b, PDBe:4o2b, PDBj:4o2b
PDBsum4o2b
PubMed24530796
UniProtQ6B856|TBB2B_BOVIN Tubulin beta-2B chain (Gene Name=TUBB2B)

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