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sc-PDB

An Annotated Database of Druggable Binding Sites from the Protein DataBank

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Protein Data Bank Entry:

1okn

2.400 Å

X-ray

1996-06-25

Interactomes:
Molecular Function:
Binding Site :

Uniprot Annotation

Name:Carbonic anhydrase 2
ID:CAH2_HUMAN
AC:P00918
Organism:Homo sapiens
Reign:Eukaryota
TaxID:9606
EC Number:4.2.1.1


Chains:

Chain Name:Percentage of Residues
within binding site
A100 %


Ligand binding site composition:

B-Factor:14.434
Number of residues:26
Including
Standard Amino Acids: 25
Non Standard Amino Acids: 1
Water Molecules: 0
Cofactors:
Metals: ZN

Cavity properties

LigandabilityVolume (Å3)
0.469327.375

% Hydrophobic% Polar
49.4850.52
According to VolSite

Ligand :
1okn_1 Structure
HET Code: STB
Formula: C12H20N3O3S2
Molecular weight: 318.435 g/mol
DrugBank ID: DB04002
Buried Surface Area:48.47 %
Polar Surface area: 153.04 Å2
Number of
H-Bond Acceptors: 4
H-Bond Donors: 4
Rings: 1
Aromatic rings: 1
Anionic atoms: 0
Cationic atoms: 1
Rule of Five Violation: 0
Rotatable Bonds: 8

Mass center Coordinates

XYZ
-3.40855.770415.3726


Binding mode :
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Binding mode
BioSolveIT Image generated by PoseView
Protein
Binding Site
Ligand
Interaction pattern
hydrophobic (CA)
aromatic (CZ)
hydrogen bond acceptor (O)
hydrogen bond acceptor/donor (OG)
hydrogen bond donor (N)
positively ionized (NZ)
negatively ionized (OD1)
metal (ZN)

Legend:

Represent the protein/ligand binding mode, centered on the ligand
Dashed lines represents hydrogen bonds and metal interactions
Green residue labels for amino acids with hydrophobic contacts (green lines) to the ligand

Image generated using PoseView by BioSolveIT
BioSolveIT


LigandProteinInteraction
AtomAtomResidueDistance
(Å)
Angle (°)Type
C2CG1VAL- 12140Hydrophobic
C3CG2VAL- 1213.470Hydrophobic
C3'CE2PHE- 1314.140Hydrophobic
C4CD2LEU- 1983.540Hydrophobic
O1SNTHR- 1993.47141.88H-Bond
(Protein Donor)
N3SOG1THR- 1993.1138.5H-Bond
(Ligand Donor)
C2'CGPRO- 2023.880Hydrophobic
S7'CGPRO- 2023.740Hydrophobic
N3SZN ZN- 2622.460Metal Acceptor