Structure of PDB 4dfr Chain A Binding Site BS01

Receptor Information
>4dfr Chain A (length=159) Species: 37762 (Escherichia coli B) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
MISLIAALAVDRVIGMENAMPWNLPADLAWFKRNTLDKPVIMGRHTWESI
GRPLPGRKNIILSSQPGTDDRVTWVKSVDEAIAACGDVPEIMVIGGGRVY
EQFLPKAQKLYLTHIDAEVEGDTHFPDYEPDDWESVFSEFHDADAQNSHS
YCFKILERR
Ligand information
Ligand IDMTX
InChIInChI=1S/C20H22N8O5/c1-28(9-11-8-23-17-15(24-11)16(21)26-20(22)27-17)12-4-2-10(3-5-12)18(31)25-13(19(32)33)6-7-14(29)30/h2-5,8,13H,6-7,9H2,1H3,(H,25,31)(H,29,30)(H,32,33)(H4,21,22,23,26,27)/t13-/m0/s1
InChIKeyFBOZXECLQNJBKD-ZDUSSCGKSA-N
SMILES
SoftwareSMILES
CACTVS 3.341CN(Cc1cnc2nc(N)nc(N)c2n1)c3ccc(cc3)C(=O)N[CH](CCC(O)=O)C(O)=O
CACTVS 3.341CN(Cc1cnc2nc(N)nc(N)c2n1)c3ccc(cc3)C(=O)N[C@@H](CCC(O)=O)C(O)=O
OpenEye OEToolkits 1.5.0CN(Cc1cnc2c(n1)c(nc(n2)N)N)c3ccc(cc3)C(=O)NC(CCC(=O)O)C(=O)O
ACDLabs 10.04O=C(O)C(NC(=O)c1ccc(cc1)N(C)Cc2nc3c(nc2)nc(nc3N)N)CCC(=O)O
OpenEye OEToolkits 1.5.0CN(Cc1cnc2c(n1)c(nc(n2)N)N)c3ccc(cc3)C(=O)N[C@@H](CCC(=O)O)C(=O)O
FormulaC20 H22 N8 O5
NameMETHOTREXATE
ChEMBLCHEMBL34259
DrugBankDB00563
ZINCZINC000001529323
PDB chain4dfr Chain A Residue 161 [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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PDB4dfr Crystal structures of Escherichia coli and Lactobacillus casei dihydrofolate reductase refined at 1.7 A resolution. I. General features and binding of methotrexate.
Resolution1.7 Å
Binding residue
(original residue number in PDB)		I5 A6 D27 F31 K32 I50 R52 L54 R57 I94
Binding residue
(residue number reindexed from 1)		I5 A6 D27 F31 K32 I50 R52 L54 R57 I94
Annotation score2
Binding affinityBindingDB: IC50=8.8nM,EC50=1nM
Enzymatic activity
Catalytic site (original residue number in PDB) I5 M20 W22 D27 L28 F31 L54 I91 T113
Catalytic site (residue number reindexed from 1) I5 M20 W22 D27 L28 F31 L54 I91 T113
Enzyme Commision number 1.5.1.3: dihydrofolate reductase.
Gene Ontology
Molecular Function
GO:0004146 dihydrofolate reductase activity
GO:0005515 protein binding
GO:0005542 folic acid binding
GO:0016491 oxidoreductase activity
GO:0050661 NADP binding
GO:0051870 methotrexate binding
GO:0051871 dihydrofolic acid binding
GO:0070401 NADP+ binding
GO:0070402 NADPH binding
Biological Process
GO:0006730 one-carbon metabolic process
GO:0009257 10-formyltetrahydrofolate biosynthetic process
GO:0009410 response to xenobiotic stimulus
GO:0031427 response to methotrexate
GO:0046452 dihydrofolate metabolic process
GO:0046654 tetrahydrofolate biosynthetic process
GO:0046655 folic acid metabolic process
GO:0046656 folic acid biosynthetic process
GO:0046677 response to antibiotic
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:4dfr, PDBe:4dfr, PDBj:4dfr
PDBsum4dfr
PubMed6815178
UniProtP0ABQ4|DYR_ECOLI Dihydrofolate reductase (Gene Name=folA)

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