Structure of PDB 2hoc Chain A Binding Site BS03

Receptor Information
>2hoc Chain A (length=258) Species: 9606 (Homo sapiens) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
HHWGYGKHNGPEHWHKDFPIAKGERQSPVDIDTHTAKYDPSLKPLSVSYD
QATSLRILNNGHAFNVEFDDSQDKAVLKGGPLDGTYRLIQFHFHWGSLDG
QGSEHTVDKKKYAAELHLVHWNTKYGDFGKAVQQPDGLAVLGIFLKVGSA
KPGLQKVVDVLDSIKTKGKSADFTNFDPRGLLPESLDYWTYPGSLTTPPL
LECVTWIVLKEPISVSSEQVLKFRKLNFNGEGEPEELMVDNWRPAQPLKN
RQIKASFK
Ligand information
Ligand ID1CN
InChIInChI=1S/C8H7ClFN5O4S3/c9-4-1-3(2-5(10)6(4)11)22(18,19)15-7-13-14-8(20-7)21(12,16)17/h1-2H,11H2,(H,13,15)(H2,12,16,17)
InChIKeyHOLJYLOVIHBQHO-UHFFFAOYSA-N
SMILES
SoftwareSMILES
ACDLabs 10.04O=S(=O)(c1nnc(s1)NS(=O)(=O)c2cc(F)c(N)c(Cl)c2)N
OpenEye OEToolkits 1.5.0c1c(cc(c(c1F)N)Cl)S(=O)(=O)Nc2nnc(s2)S(=O)(=O)N
CACTVS 3.341Nc1c(F)cc(cc1Cl)[S](=O)(=O)Nc2sc(nn2)[S](N)(=O)=O
FormulaC8 H7 Cl F N5 O4 S3
Name5-{[(4-AMINO-3-CHLORO-5-FLUOROPHENYL)SULFONYL]AMINO}-1,3,4-THIADIAZOLE-2-SULFONAMIDE
ChEMBLCHEMBL71611
DrugBankDB06891
ZINCZINC000013520197
PDB chain2hoc Chain A Residue 266 [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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PDB2hoc Carbonic anhydrase inhibitors: X-ray crystallographic studies for the binding of 5-amino-1,3,4-thiadiazole-2-sulfonamide and 5-(4-amino-3-chloro-5-fluorophenylsulfonamido)-1,3,4-thiadiazole-2-sulfonamide to human isoform II.
Resolution2.1 Å
Binding residue
(original residue number in PDB)		F20 P21 I22 V135 Q136 P202 L204 E205
Binding residue
(residue number reindexed from 1)		F18 P19 I20 V132 Q133 P199 L201 E202
Annotation score1
Binding affinityMOAD: Ki=0.3nM
PDBbind-CN: -logKd/Ki=9.52,Ki=0.3nM
BindingDB: Ki=0.3nM
Enzymatic activity
Catalytic site (original residue number in PDB) H64 H94 H96 E106 H119 T199
Catalytic site (residue number reindexed from 1) H62 H92 H94 E104 H117 T196
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:2hoc, PDBe:2hoc, PDBj:2hoc
PDBsum2hoc
PubMed17000110
UniProtP00918|CAH2_HUMAN Carbonic anhydrase 2 (Gene Name=CA2)

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