Structure of PDB 3fl9 Chain C Binding Site BS02

Receptor Information
>3fl9 Chain C (length=165) Species: 1392 (Bacillus anthracis) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
MIVSFMVAMDENRVIGKDNNLPWRLPSELQYVKKTTMGHPLIMGRKNYEA
IGRPLPGRRNIIVTRNEGYHVEGCEVAHSVEEVFELCKNEEEIFIFGGAQ
IYDLFLPYVDKLYITKIHHAFEGDTFFPEMDTNWKEVFVEKGLTDEKNPY
TYYYHVYEKQQLVPR
Ligand information
Ligand IDTOP
InChIInChI=1S/C14H18N4O3/c1-19-10-5-8(6-11(20-2)12(10)21-3)4-9-7-17-14(16)18-13(9)15/h5-7H,4H2,1-3H3,(H4,15,16,17,18)
InChIKeyIEDVJHCEMCRBQM-UHFFFAOYSA-N
SMILES
SoftwareSMILES
CACTVS 3.341COc1cc(Cc2cnc(N)nc2N)cc(OC)c1OC
OpenEye OEToolkits 1.5.0COc1cc(cc(c1OC)OC)Cc2cnc(nc2N)N
ACDLabs 10.04n1c(N)c(cnc1N)Cc2cc(OC)c(OC)c(OC)c2
FormulaC14 H18 N4 O3
NameTRIMETHOPRIM
ChEMBLCHEMBL22
DrugBankDB00440
ZINCZINC000006627681
PDB chain3fl9 Chain C Residue 200 [Download ligand structure] [Download structure with residue number starting from 1] [View ligand structure]
Receptor-Ligand Complex Structure
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PDB3fl9 Crystal structure of Bacillus anthracis dihydrofolate reductase with the dihydrophthalazine-based trimethoprim derivative RAB1 provides a structural explanation of potency and selectivity.
Resolution2.4 Å
Binding residue
(original residue number in PDB)		M6 V7 A8 E28 L29 V32 I51 F96
Binding residue
(residue number reindexed from 1)		M6 V7 A8 E28 L29 V32 I51 F96
Annotation score1
Binding affinityMOAD: ic50=77.2mM
BindingDB: Ki=24100nM,IC50=71000nM
Enzymatic activity
Catalytic site (original residue number in PDB) M6 L21 W23 E28 L29 V32 L55 I93 T115
Catalytic site (residue number reindexed from 1) M6 L21 W23 E28 L29 V32 L55 I93 T115
Enzyme Commision number 1.5.1.3: dihydrofolate reductase.
Gene Ontology
Molecular Function
GO:0000166 nucleotide binding
GO:0004146 dihydrofolate reductase activity
GO:0016491 oxidoreductase activity
GO:0046872 metal ion binding
GO:0050661 NADP binding
Biological Process
GO:0006730 one-carbon metabolic process
GO:0046452 dihydrofolate metabolic process
GO:0046654 tetrahydrofolate biosynthetic process
GO:0046655 folic acid metabolic process
Cellular Component
GO:0005829 cytosol

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Molecular Function
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Biological Process
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Cellular Component
External links
PDB RCSB:3fl9, PDBe:3fl9, PDBj:3fl9
PDBsum3fl9
PubMed19364848
UniProtQ81R22

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