Structure of PDB 2d0u Chain B

Receptor sequence

>2d0uB (length=374) Species: 9606 (Homo sapiens) [Search protein sequence]

ISKEYHIDEEVGFALPNPQENLPDFYNDWMFIAKHLPDLIESGQLRERVE
KLNMLSIDHLTDHKSQRLARLVLGCITMAYVWGKGHGDVRKVLPRNIAVP
YCQLSKKLELPPILVYADCVLANWKKKDPNKPLTYENMDVLFSFRDGDCS
KGFFLVSLLVEIAAASAIKVIPTVFKAMQMQERDTLLKALLEIASCLEKA
LQVFHQIHDHVNPKAFFSVLRIYLSGWKGNPQLSDGLVYEGFWEDPKEFA
GGSAGQSSVFQCFDVLLGIQQTAGGGHAAQFLQDMRRYMPPAHRNFLCSL
ESNPSVREFVLSKGDAGLREAYDACVKALVSLRSYHLQIVTKYILIPASQ
GGTDLMNFLKTVRSTTEKSLLKEG

3D structure

PDB

2d0u Crystal structure of human indoleamine 2,3-dioxygenase: catalytic mechanism of O2 incorporation by a heme-containing dioxygenase.

Chain

Resolution

3.4 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 V170 F214 I217 F226 S263 A264 G265 F270 R343 H346 I349 Y353 I354 L384 V391	F153 V160 F204 I207 F216 S253 A254 G255 F260 R333 H336 I339 Y343 I344 L355 V362

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

View graph for
Molecular Function

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Biological Process

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Cellular Component

External links

PDB	RCSB:2d0u, PDBe:2d0u, PDBj:2d0u
PDBsum	2d0u
PubMed	16477023
UniProt	P14902\|I23O1_HUMAN Indoleamine 2,3-dioxygenase 1 (Gene Name=IDO1)

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