Structure of PDB 3t5u Chain A Binding Site BS05

Receptor Information
>3t5u Chain A (length=256) 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
QIKASF
Ligand information
Ligand IDA09
InChIInChI=1S/C6H7NO3S/c8-7-11(9,10)6-4-2-1-3-5-6/h1-5,7-8H
InChIKeyBRMDATNYMUMZLN-UHFFFAOYSA-N
SMILES
SoftwareSMILES
OpenEye OEToolkits 1.7.2c1ccc(cc1)S(=O)(=O)NO
CACTVS 3.370ON[S](=O)(=O)c1ccccc1
ACDLabs 12.01O=S(=O)(NO)c1ccccc1
FormulaC6 H7 N O3 S
NameN-hydroxybenzenesulfonamide
ChEMBLCHEMBL55310
DrugBank
ZINCZINC000004284435
PDB chain3t5u Chain A Residue 266 [Download ligand structure] [Download structure with residue number starting from 1] [View ligand structure]
Receptor-Ligand Complex Structure
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PDB3t5u Carbonic anhydrase inhibitors: X-ray crystallographic studies for the binding of N-substituted benzenesulfonamides to human isoform II.
Resolution1.75 Å
Binding residue
(original residue number in PDB)		E69 I91 Q92
Binding residue
(residue number reindexed from 1)		E66 I88 Q89
Annotation score1
Binding affinityMOAD: Ki=5.47uM
PDBbind-CN: -logKd/Ki=7.59,Ki=0.026uM
BindingDB: Ki=26nM
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:3t5u, PDBe:3t5u, PDBj:3t5u
PDBsum3t5u
PubMed21952494
UniProtP00918|CAH2_HUMAN Carbonic anhydrase 2 (Gene Name=CA2)

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