Structure of PDB 3eig Chain A

Receptor sequence
>3eigA (length=186) Species: 9606 (Homo sapiens) [Search protein sequence]
VGSLNCIVAVSQNMGIGKNGDLPWPPLRNERRYFERMTTTSSVEGKQNLV
IMGKKTWFSIPEKNRPLKGRINLVLSRELKEPPQGAHFLSRSLDDALKLT
EQPELANKVDMVWIVGGSSVYKEAMNHPGHLKLFVTRIMQDFESDTFFPE
IDLEKYKLLPEYPGVLSDVQEEKGIKYKFEVYEKND
3D structure
PDB3eig Multiple conformers in active site of human dihydrofolate reductase F31R/Q35E double mutant suggest structural basis for methotrexate resistance.
ChainA
Resolution1.7 Å
3D
structure
Catalytic site residues are labeled in the structure
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Enzymatic activity
Catalytic site (original residue number in PDB) L22 E30
Catalytic site (residue number reindexed from 1) L22 E30
Enzyme Commision number 1.5.1.3: dihydrofolate reductase.
Interaction with ligand
Site
#		 Ligand Ligand
chain		 Binding residues on receptor
(original residue number in PDB)		 Binding residues on receptor
(residue number reindexed from 1)		 Binding affinity
BS01 MTX A I7 V8 L22 E30 R31 R32 F34 E35 N64 L67 R70 V115 I7 V8 L22 E30 R31 R32 F34 E35 N64 L67 R70 V115 MOAD: Ki=21nM
PDBbind-CN: -logKd/Ki=7.68,Ki=21nM
BindingDB: IC50=22nM,Kd=0.194984nM,Ki=4420nM,EC50=13.3nM
Gene Ontology
Molecular Function
GO:0000900 mRNA regulatory element binding translation repressor activity
GO:0003723 RNA binding
GO:0003729 mRNA binding
GO:0004146 dihydrofolate reductase activity
GO:0005542 folic acid binding
GO:0016491 oxidoreductase activity
GO:0050661 NADP binding
GO:0070402 NADPH binding
GO:1990825 sequence-specific mRNA binding
Biological Process
GO:0006729 tetrahydrobiopterin biosynthetic process
GO:0006730 one-carbon metabolic process
GO:0017148 negative regulation of translation
GO:0031103 axon regeneration
GO:0031427 response to methotrexate
GO:0046452 dihydrofolate metabolic process
GO:0046653 tetrahydrofolate metabolic process
GO:0046654 tetrahydrofolate biosynthetic process
GO:0046655 folic acid metabolic process
GO:0051000 positive regulation of nitric-oxide synthase activity
GO:2000121 regulation of removal of superoxide radicals
Cellular Component
GO:0005737 cytoplasm
GO:0005739 mitochondrion
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:3eig, PDBe:3eig, PDBj:3eig
PDBsum3eig
PubMed19478082
UniProtP00374|DYR_HUMAN Dihydrofolate reductase (Gene Name=DHFR)

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