Structure of PDB 5ek4 Chain B

Receptor sequence
>5ek4B (length=374) Species: 9606 (Homo sapiens) [Search protein sequence]
ISKEYHIDEEVGFALPNPQENLPDFYNDWMFIAKHLPDLIESGQLRERVE
KLNMLSIDHLTDHKSQRLARLVLGCITMAYVWGKGHGDVRKVLPRNIAVP
YCQLSKKLELPPILVYADCVLANWKKKDPNKPLTYENMDVLFSFRDGDCS
KGFFLVSLLVEIAAASAIKVIPTVFKAMQMQERDTLLKALLEIASCLEKA
LQVFHQIHDHVNPKAFFSVLRIYLSGWKGNPQLSDGLVYEGFWEDPKEFA
GGSAGQSSVFQCFDVLLGIQQTAGGGHAAQFLQDMRRYMPPAHRNFLCSL
ESNPSVREFVLSKGDAGLREAYDACVKALVSLRSYHLQIVTKYILIPASQ
GGTDLMNFLKTVRSTTEKSLLKEG
3D structure
PDB5ek4 Important Hydrogen Bond Networks in Indoleamine 2,3-Dioxygenase 1 (IDO1) Inhibitor Design Revealed by Crystal Structures of Imidazoleisoindole Derivatives with IDO1
ChainB
Resolution2.64 Å
3D
structure
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Enzymatic activity
Enzyme Commision number 1.13.11.52: indoleamine 2,3-dioxygenase.
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 HEM B F163 S167 V170 F214 F226 S263 A264 F270 R343 H346 I349 V350 Y353 I354 F387 L388 V391 F153 S157 V160 F204 F216 S253 A254 F260 R333 H336 I339 V340 Y343 I344 F358 L359 V362
BS02 5PF B Y126 F163 F164 F226 R231 L234 G262 A264 Y116 F153 F154 F216 R221 L224 G252 A254 BindingDB: IC50=<1000nM,EC50=200nM
Gene Ontology
Molecular Function
GO:0004833 tryptophan 2,3-dioxygenase activity
GO:0009055 electron transfer activity
GO:0016702 oxidoreductase activity, acting on single donors with incorporation of molecular oxygen, incorporation of two atoms of oxygen
GO:0020037 heme binding
GO:0033754 indoleamine 2,3-dioxygenase activity
GO:0046872 metal ion binding
GO:0051213 dioxygenase activity
Biological Process
GO:0002376 immune system process
GO:0002666 positive regulation of T cell tolerance induction
GO:0002678 positive regulation of chronic inflammatory response
GO:0002830 positive regulation of type 2 immune response
GO:0006569 tryptophan catabolic process
GO:0006954 inflammatory response
GO:0007565 female pregnancy
GO:0019441 tryptophan catabolic process to kynurenine
GO:0019805 quinolinate biosynthetic process
GO:0032496 response to lipopolysaccharide
GO:0032693 negative regulation of interleukin-10 production
GO:0032735 positive regulation of interleukin-12 production
GO:0033555 multicellular organismal response to stress
GO:0034276 kynurenic acid biosynthetic process
GO:0034354 'de novo' NAD biosynthetic process from tryptophan
GO:0036269 swimming behavior
GO:0042098 T cell proliferation
GO:0042130 negative regulation of T cell proliferation
GO:0043065 positive regulation of apoptotic process
GO:0046006 regulation of activated T cell proliferation
GO:0070233 negative regulation of T cell apoptotic process
GO:0070234 positive regulation of T cell apoptotic process
Cellular Component
GO:0005737 cytoplasm
GO:0005829 cytosol
GO:0030485 smooth muscle contractile fiber
GO:0032421 stereocilium bundle

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Molecular Function
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Biological Process
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Cellular Component
External links
PDB RCSB:5ek4, PDBe:5ek4, PDBj:5ek4
PDBsum5ek4
PubMed26642377
UniProtP14902|I23O1_HUMAN Indoleamine 2,3-dioxygenase 1 (Gene Name=IDO1)

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