Structure of PDB 4iwz Chain A Binding Site BS01

Receptor Information
>4iwz Chain A (length=257) Species: 9606 (Homo sapiens) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
HWGYGKHNGPEHWHKDFPIAKGERQSPVDIDTHTAKYDPSLKPLSVSYDQ
ATSLRILNNGHAFNVEFDDSQDKAVLKGGPLDGTYRLIQFHFHWGSLDGQ
GSEHTVDKKKYAAELHLVHWNTKYGDFGKAVQQPDGLAVLGIFLKVGSAK
PGLQKVVDVLDSIKTKGKSADFTNFDPRGLLPESLDYWTYPGSLTTPPLL
ECVTWIVLKEPISVSSEQVLKFRKLNFNGEGEPEELMVDNWRPAQPLKNR
QIKASFK
Ligand information
Ligand ID1GO
InChIInChI=1S/C8H8N4O3S3/c9-18(14,15)8-12-11-7(17-8)10-6(13)4-5-2-1-3-16-5/h1-3H,4H2,(H2,9,14,15)(H,10,11,13)
InChIKeyKROUVPYNINHEBZ-UHFFFAOYSA-N
SMILES
SoftwareSMILES
CACTVS 3.370N[S](=O)(=O)c1sc(NC(=O)Cc2sccc2)nn1
ACDLabs 12.01O=S(=O)(c1nnc(s1)NC(=O)Cc2sccc2)N
OpenEye OEToolkits 1.7.6c1cc(sc1)CC(=O)Nc2nnc(s2)S(=O)(=O)N
FormulaC8 H8 N4 O3 S3
NameN-(5-sulfamoyl-1,3,4-thiadiazol-2-yl)-2-(thiophen-2-yl)acetamide
ChEMBLCHEMBL574780
DrugBank
ZINCZINC000045288012
PDB chain4iwz Chain A Residue 301 [Download ligand structure] [Download structure with residue number starting from 1] [View ligand structure]
Receptor-Ligand Complex Structure
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PDB4iwz Effect of incorporating a thiophene tail in the scaffold of acetazolamide on the inhibition of human carbonic anhydrase isoforms I, II, IX and XII.
Resolution1.598 Å
Binding residue
(original residue number in PDB)		I91 Q92 H94 H96 H119 F131 L198 T199 T200
Binding residue
(residue number reindexed from 1)		I88 Q89 H91 H93 H116 F127 L194 T195 T196
Annotation score1
Binding affinityMOAD: Ki=51nM
PDBbind-CN: -logKd/Ki=7.29,Ki=51nM
BindingDB: Ki=51nM
Enzymatic activity
Catalytic site (original residue number in PDB) H64 H94 H96 E106 H119 T199
Catalytic site (residue number reindexed from 1) H61 H91 H93 E103 H116 T195
Enzyme Commision number 4.2.1.1: carbonic anhydrase.
4.2.1.69: cyanamide hydratase.
Gene Ontology
Molecular Function
GO:0004064 arylesterase activity
GO:0004089 carbonate dehydratase activity
GO:0005515 protein binding
GO:0008270 zinc ion binding
GO:0016829 lyase activity
GO:0018820 cyanamide hydratase activity
GO:0046872 metal ion binding
Biological Process
GO:0002009 morphogenesis of an epithelium
GO:0006730 one-carbon metabolic process
GO:0015670 carbon dioxide transport
GO:0032230 positive regulation of synaptic transmission, GABAergic
GO:0032849 positive regulation of cellular pH reduction
GO:0038166 angiotensin-activated signaling pathway
GO:0044070 regulation of monoatomic anion transport
GO:0046903 secretion
GO:0051453 regulation of intracellular pH
GO:0070050 neuron cellular homeostasis
GO:2001150 positive regulation of dipeptide transmembrane transport
GO:2001225 regulation of chloride transport
Cellular Component
GO:0005737 cytoplasm
GO:0005829 cytosol
GO:0005886 plasma membrane
GO:0043209 myelin sheath
GO:0045177 apical part of cell
GO:0070062 extracellular exosome

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Molecular Function
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Biological Process
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Cellular Component
External links
PDB RCSB:4iwz, PDBe:4iwz, PDBj:4iwz
PDBsum4iwz
PubMed23993330
UniProtP00918|CAH2_HUMAN Carbonic anhydrase 2 (Gene Name=CA2)

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