Structure of PDB 1aof Chain A Binding Site BS01

Receptor Information
>1aof Chain A (length=532) Species: 82367 (Paracoccus pantotrophus) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
DVAAPGAPEGVTALSDAQYNEANKIYFERCAGCHGVLRKGATGKALTPDL
TRDLGFDYLQSFITYASPAGMPNWGTSGELSAEQVDLMANYLLLDPAAPP
EFGMKEMRESWKVHVAPEDRPTQQMNDWDLENLFSVTLRDAGQIALIDGS
TYEIKTVLDTGYAVHISRLSASGRYLFVIGRDGKVNMIDLWMKEPTTVAE
IKIGSEARSIETSKMEGWEDKYAIAGAYWPPQYVIMDGETLEPKKIQSTR
GMTYDEQEYHPEPRVAAILASHYRPEFIVNVKETGKILLVDYTDLNNLKT
TEISAERFLHDGGLDGSHRYFITAANARNKLVVIDTKEGKLVAIEDTGGQ
TPHPGRGANFVHPTFGPVWATSHMGDDSVALIGTDPEGHPDNAWKILDSF
PALGGGSLFIKTHPNSQYLYVDATLNPEAEISGSVAVFDIKAMTGDGSDP
EFKTLPIAEWAGITEGQPRVVQGEFNKDGTEVWFSVWNGKDQESALVVVD
DKTLELKHVIKDERLVTPTGKFNVYNTMTDTY
Ligand information
Ligand IDHEM
InChIInChI=1S/C34H34N4O4.Fe/c1-7-21-17(3)25-13-26-19(5)23(9-11-33(39)40)31(37-26)16-32-24(10-12-34(41)42)20(6)28(38-32)15-30-22(8-2)18(4)27(36-30)14-29(21)35-25;/h7-8,13-16H,1-2,9-12H2,3-6H3,(H4,35,36,37,38,39,40,41,42);/q;+2/p-2/b25-13-,26-13-,27-14-,28-15-,29-14-,30-15-,31-16-,32-16-;
InChIKeyKABFMIBPWCXCRK-RGGAHWMASA-L
SMILES
SoftwareSMILES
OpenEye OEToolkits 1.7.6Cc1c2n3c(c1CCC(=O)O)C=C4C(=C(C5=[N]4[Fe]36[N]7=C(C=C8N6C(=C5)C(=C8C)C=C)C(=C(C7=C2)C)C=C)C)CCC(=O)O
CACTVS 3.385CC1=C(CCC(O)=O)C2=Cc3n4[Fe]5|6|N2=C1C=c7n5c(=CC8=N|6C(=Cc4c(C)c3CCC(O)=O)C(=C8C=C)C)c(C)c7C=C
ACDLabs 12.01C=1c3c(c(c4C=C5C(=C(C=6C=C7C(=C(C8=CC=2C(=C(C=1N=2[Fe](n34)(N5=6)N78)CCC(=O)O)C)\C=C)C)\C=C)C)C)CCC(=O)O
FormulaC34 H32 Fe N4 O4
NamePROTOPORPHYRIN IX CONTAINING FE;
HEME
ChEMBL
DrugBankDB18267
ZINC
PDB chain1aof Chain A Residue 601 [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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PDB1aof Haem-ligand switching during catalysis in crystals of a nitrogen-cycle enzyme.
Resolution2.0 Å
Binding residue
(original residue number in PDB)		C65 C68 H69 G78 L81 Y93 F97 S102 A104 G105 M106 P107 W109
Binding residue
(residue number reindexed from 1)		C30 C33 H34 G43 L46 Y58 F62 S67 A69 G70 M71 P72 W74
Annotation score1
Enzymatic activity
Catalytic site (original residue number in PDB) C65 C68 H69 M106 H345 H388
Catalytic site (residue number reindexed from 1) C30 C33 H34 M71 H310 H353
Enzyme Commision number 1.7.2.1: nitrite reductase (NO-forming).
1.7.99.1: hydroxylamine reductase.
Gene Ontology
Molecular Function
GO:0009055 electron transfer activity
GO:0016491 oxidoreductase activity
GO:0020037 heme binding
GO:0046872 metal ion binding
GO:0050418 hydroxylamine reductase activity
GO:0050421 nitrite reductase (NO-forming) activity
Cellular Component
GO:0042597 periplasmic space

View graph for
Molecular Function
View graph for
Cellular Component
External links
PDB RCSB:1aof, PDBe:1aof, PDBj:1aof
PDBsum1aof
PubMed9311786
UniProtP72181|NIRS_PARPN Nitrite reductase (Gene Name=nirS)

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