Structure of PDB 1k4t Chain A Binding Site BS04

Receptor Information
>1k4t Chain A (length=565) Species: 9606 (Homo sapiens) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
QKWKWWEEERYPEGIKWKFLEHKGPVFAPPYEPLPENVKFYYDGKVMKLS
PKAEEVATFFAKMLDHEYTTKEIFRKNFFKDWRKEMTNEEKNIITNLSKC
DFTQMSQYFKAQTEARKQMSKEEKLKIKEENEKLLKEYGFCIMDNHKERI
ANFKIEPPGLFRGRGNHPKMGMLKRRIMPEDIIINCSKDAKVPSPPPGHK
WKEVRHDNKVTWLVSWTENIQGSIKYIMLNPSSRIKGEKDWQKYETARRL
KKCVDKIRNQYREDWKSKEMKVRQRAVALYFIDKLALRAGNEKEEGETAD
TVGCCSLRVEHINLHPELDGQEYVVEFDFLGKDSIRYYNKVPVEKRVFKN
LQLFMENKQPEDDLFDRLNTGILNKHLQDLMEGLTAKVFRTYNASITLQQ
QLKELTAPDENIPAKILSYNRANRAVAILCNHQRAPPKTFEKSMMNLQTK
IDAKKEQLADARRDLKSAKADAKVMKDAKTKKVVESKKKAVQRLEEQLMK
LEVQATDREENKQIALGTSKLNYLDPRITVAWCKKWGVPIEKIYNKTQRE
KFAWAIDMADEDYEF
Ligand information
Ligand IDTTG
InChIInChI=1S/C23H25N3O6/c1-4-23(32,22(30)31)16-8-18-20-12(9-26(18)21(29)15(16)11-27)7-13-14(10-25(2)3)19(28)6-5-17(13)24-20/h5-8,27-28,32H,4,9-11H2,1-3H3,(H,30,31)/t23-/m0/s1
InChIKeyDPQJTQJZJNYUEC-QHCPKHFHSA-N
SMILES
SoftwareSMILES
OpenEye OEToolkits 1.5.0CCC(C1=C(C(=O)N2Cc3cc4c(ccc(c4CN(C)C)O)nc3C2=C1)CO)(C(=O)O)O
CACTVS 3.341CC[C@@](O)(C(O)=O)C1=C(CO)C(=O)N2Cc3cc4c(CN(C)C)c(O)ccc4nc3C2=C1
ACDLabs 10.04O=C(O)C(O)(C=4C=C3c2nc1ccc(O)c(c1cc2CN3C(=O)C=4CO)CN(C)C)CC
CACTVS 3.341CC[C](O)(C(O)=O)C1=C(CO)C(=O)N2Cc3cc4c(CN(C)C)c(O)ccc4nc3C2=C1
OpenEye OEToolkits 1.5.0CC[C@](C1=C(C(=O)N2Cc3cc4c(ccc(c4CN(C)C)O)nc3C2=C1)CO)(C(=O)O)O
FormulaC23 H25 N3 O6
Name2-(1-DIMETHYLAMINOMETHYL-2-HYDROXY-8-HYDROXYMETHYL-9-OXO-9,11-DIHYDRO-INDOLIZINO[1,2-B]QUINOLIN-7-YL)-2-HYDROXY-BUTYRIC ACID;
HYDROLYZED PRODUCT OF TOPOTECAN
ChEMBL
DrugBank
ZINCZINC000022067027
PDB chain1k4t Chain C Residue 991 [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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PDB1k4t The mechanism of topoisomerase I poisoning by a camptothecin analog
Resolution2.1 Å
Binding residue
(original residue number in PDB)
K532 D533 T718 N722
Binding residue
(residue number reindexed from 1)
K332 D333 T518 N522
Annotation score1
Enzymatic activity
Enzyme Commision number 5.6.2.1: DNA topoisomerase.
Gene Ontology
Molecular Function
GO:0003677 DNA binding
GO:0003917 DNA topoisomerase type I (single strand cut, ATP-independent) activity
Biological Process
GO:0006265 DNA topological change
Cellular Component
GO:0005694 chromosome

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Molecular Function

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Biological Process

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Cellular Component
External links
PDB RCSB:1k4t, PDBe:1k4t, PDBj:1k4t
PDBsum1k4t
PubMed12426403
UniProtP11387|TOP1_HUMAN DNA topoisomerase 1 (Gene Name=TOP1)

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