Ligand profile

PER

Ligand co-crystallized with a similar protein (Protein Data Bank).

Bound to: A0A075B6I6

Via homolog PDB 3ehb UniProt P01636 Formula O₂²⁻
Mol. weight 32.00 Da
Permeability Check
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
PER
PDB
3ehb
UniProt (similar protein)
P01636
Target protein
A0A075B6I6

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 32.00 Da
LogP (Crippen) -2.38
H-bond donors 0
H-bond acceptors 2
TPSA 46.12 Ų
Rotatable bonds 0
Aromatic rings 0 / 0
Heavy atoms 2
Fraction sp³ C 0.00
Formula O₂²⁻

Drug-likeness

Descriptor-based ADME screening flags from SMILES. These are not experimental toxicity results.

Permeability proxy Check

Estimated from TPSA and LogP only: TPSA ≤ 90 Ų and −1 ≤ LogP ≤ 5 are treated as a favorable small-molecule permeability screen.

  • TPSA ≤ 90 Ų 46.1
  • −1 ≤ LogP ≤ 5 -2.38
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 32.0
  • LogP ≤ 5 -2.38
  • H-bond donors ≤ 5 0
  • H-bond acceptors ≤ 10 2
Veber's rules Pass
  • Rotatable bonds ≤ 10 0
  • TPSA ≤ 140 Ų 46.1
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
[O-][O-]
InChI 
InChI=1S/O2/c1-2/q-2
InChIKey 
ANAIPYUSIMHBEL-UHFFFAOYSA-N

Provenance

Annotation context from LigQ_2, the internal Target step that collects PDB, ChEMBL, and ZINC ligand evidence.

Method
LigQ domain
Source
PDB
Binding sites
PF00115

External resources

Open this ligand in third-party databases and cheminformatics tools.

Other ligands for this protein

Quick navigation to other ligands bound to A0A075B6I6.

PDB 54

Ligands co-crystallized with this protein (structural evidence).

Ligand PDB entry

ChEMBL 29

Compounds with measured inhibitory activity on this target (higher pchembl = more potent).

Compound Potency (pchembl)

ZINC 50

Virtual screening candidates selected by structural similarity to known actives (Tanimoto ≥ 0.5).

Compound Similarity (Tanimoto)