Structure of PDB 1b8n Chain A Binding Site BS01

Receptor Information
>1b8n Chain A (length=278) Species: 9913 (Bos taurus) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
QNGYTYEDYQDTAKWLLSHTEQRPQVAVICGSGLGGLVNKLTQAQTFDYS
EIPNFPESTVPGHAGRLVFGILNGRACVMMQGRFHMYEGYPFWKVTFPVR
VFRLLGVETLVVTNAAGGLNPNFEVGDIMLIRDHINLPGFSGENPLRGPN
EERFGVRFPAMSDAYDRDMRQKAHSTWKQMGEQRELQEGTYVMLGGPNFE
TVAECRLLRNLGADAVGMSTVPEVIVARHCGLRVFGFSLITNKVIMDYES
QGKANHEEVLEAGKQAAQKLEQFVSLLM
Ligand information
Ligand IDIMG
InChIInChI=1S/C11H15N5O4/c12-11-15-5-3(1-13-7(5)10(20)16-11)6-9(19)8(18)4(2-17)14-6/h1,4,6,8-9,13-14,17-19H,2H2,(H3,12,15,16,20)/t4-,6+,8-,9+/m1/s1
InChIKeyKBIDJCVAURJXFG-PVEDRDFWSA-N
SMILES
SoftwareSMILES
CACTVS 3.341NC1=Nc2c(c[nH]c2C(=O)N1)[C@@H]3N[C@H](CO)[C@@H](O)[C@H]3O
OpenEye OEToolkits 1.5.0c1c(c2c([nH]1)C(=O)NC(=N2)N)C3C(C(C(N3)CO)O)O
OpenEye OEToolkits 1.5.0c1c(c2c([nH]1)C(=O)NC(=N2)N)[C@H]3[C@@H]([C@@H]([C@H](N3)CO)O)O
CACTVS 3.341NC1=Nc2c(c[nH]c2C(=O)N1)[CH]3N[CH](CO)[CH](O)[CH]3O
ACDLabs 10.04O=C1NC(=Nc2c1ncc2C3NC(CO)C(O)C3O)N
FormulaC11 H15 N5 O4
Name1,4-DIDEOXY-1,4-IMINO-1-(S)-(9-DEAZAGUANIN-9-YL)-D-RIBITOL;
IMMUCILLIN-G
ChEMBLCHEMBL473922
DrugBankDB02230
ZINCZINC000013525011
PDB chain1b8n Chain A Residue 600 [Download ligand structure] [Download structure with residue number starting from 1] [View ligand structure]
Receptor-Ligand Complex Structure
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PDB1b8n Atomic dissection of the hydrogen bond network for transition-state analogue binding to purine nucleoside phosphorylase
Resolution2.0 Å
Binding residue
(original residue number in PDB)
H86 Y88 A116 G118 F200 E201 V217 G218 M219 N243 H257 V260
Binding residue
(residue number reindexed from 1)
H85 Y87 A115 G117 F199 E200 V216 G217 M218 N242 H256 V259
Annotation score1
Binding affinityMOAD: Ki=30pM
PDBbind-CN: -logKd/Ki=10.52,Ki=30pM
BindingDB: Ki=0.030000nM
Enzymatic activity
Catalytic site (original residue number in PDB) S33 H64 H86 Y88 E89 A116 M219 S220 N243 V245 H257
Catalytic site (residue number reindexed from 1) S32 H63 H85 Y87 E88 A115 M218 S219 N242 V244 H256
Enzyme Commision number 2.4.2.1: purine-nucleoside phosphorylase.
Gene Ontology
Molecular Function
GO:0003824 catalytic activity
GO:0004731 purine-nucleoside phosphorylase activity
GO:0016757 glycosyltransferase activity
GO:0016763 pentosyltransferase activity
GO:0047975 guanosine phosphorylase activity
Biological Process
GO:0006139 nucleobase-containing compound metabolic process
GO:0006166 purine ribonucleoside salvage
GO:0009116 nucleoside metabolic process
Cellular Component
GO:0005737 cytoplasm

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Molecular Function

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Biological Process

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Cellular Component
External links
PDB RCSB:1b8n, PDBe:1b8n, PDBj:1b8n
PDBsum1b8n
PubMed12463747
UniProtP55859|PNPH_BOVIN Purine nucleoside phosphorylase (Gene Name=PNP)

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