Structure of PDB 1icu Chain A Binding Site BS02

Receptor Information
>1icu Chain A (length=216) Species: 562 (Escherichia coli) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
DIISVALKRHSTKAFDASKKLTPEQAEQIKTLLQYSPSSTNSQPWHFIVA
STEEGKARVAKSAAGNYVFNERKMLDASHVVVFCAKTAMDDVWLKLVVDQ
EDADGRFATPEAKAANDKGRKFFADMHRKDLHDDAEWMAKQVYLNVGNFL
LGVAALGLDAVPIEGFDAAILDAEFGLKEKGYTSLVVVPVGHHSVEDFNA
TLPKSRLPQNITLTEV
Ligand information
Ligand IDNIO
InChIInChI=1S/C6H5NO2/c8-6(9)5-2-1-3-7-4-5/h1-4H,(H,8,9)
InChIKeyPVNIIMVLHYAWGP-UHFFFAOYSA-N
SMILES
SoftwareSMILES
ACDLabs 10.04O=C(O)c1cccnc1
OpenEye OEToolkits 1.5.0c1cc(cnc1)C(=O)O
CACTVS 3.341OC(=O)c1cccnc1
FormulaC6 H5 N O2
NameNICOTINIC ACID
ChEMBLCHEMBL573
DrugBankDB00627
ZINCZINC000000001795
PDB chain1icu Chain A Residue 221 [Download ligand structure] [Download structure with residue number starting from 1] [View ligand structure]
Receptor-Ligand Complex Structure
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PDB1icu The structure of Escherichia coli nitroreductase complexed with nicotinic acid: three crystal forms at 1.7 A, 1.8 A and 2.4 A resolution.
Resolution1.8 Å
Binding residue
(original residue number in PDB)		S40 T41 F124
Binding residue
(residue number reindexed from 1)		S39 T40 F123
Annotation score1
Enzymatic activity
Catalytic site (original residue number in PDB) K14 K74 E165
Catalytic site (residue number reindexed from 1) K13 K73 E164
Enzyme Commision number 1.-.-.-
1.5.1.34: 6,7-dihydropteridine reductase.
Gene Ontology
Molecular Function
GO:0003955 NAD(P)H dehydrogenase (quinone) activity
GO:0004155 6,7-dihydropteridine reductase activity
GO:0010181 FMN binding
GO:0016491 oxidoreductase activity
GO:0042802 identical protein binding
GO:0042803 protein homodimerization activity
GO:0046857 oxidoreductase activity, acting on other nitrogenous compounds as donors, with NAD or NADP as acceptor
Biological Process
GO:0046256 2,4,6-trinitrotoluene catabolic process
Cellular Component
GO:0005829 cytosol
GO:0016020 membrane

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Cellular Component
External links
PDB RCSB:1icu, PDBe:1icu, PDBj:1icu
PDBsum1icu
PubMed11491290
UniProtP38489|NFSB_ECOLI Oxygen-insensitive NAD(P)H nitroreductase (Gene Name=nfsB)

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