Ligand profile

ORO

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

Bound to: KP13_03859 — Dihydroorotate dehydrogenase

Via homolog PDB 1f76 UniProt P0A7E1 Formula C₅H₄N₂O₄
Mol. weight 156.10 Da
Permeability Check
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
ORO
PDB
1f76
UniProt (similar protein)
P0A7E1
Target protein
KP13_03859

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 156.10 Da
LogP (Crippen) -1.24
H-bond donors 3
H-bond acceptors 3
TPSA 103.02 Ų
Rotatable bonds 1
Aromatic rings 1 / 1
Heavy atoms 11
Fraction sp³ C 0.00
Formula C₅H₄N₂O₄

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 103.0
  • −1 ≤ LogP ≤ 5 -1.24
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 156.1
  • LogP ≤ 5 -1.24
  • H-bond donors ≤ 5 3
  • H-bond acceptors ≤ 10 3
Veber's rules Pass
  • Rotatable bonds ≤ 10 1
  • TPSA ≤ 140 Ų 103.0
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
C1=C(NC(=O)NC1=O)C(=O)O
InChI 
InChI=1S/C5H4N2O4/c8-3-1-2(4(9)10)6-5(11)7-3/h1H,(H,9,10)(H2,6,7,8,11)
InChIKey 
PXQPEWDEAKTCGB-UHFFFAOYSA-N

Provenance

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

Method
LigQ sequence
Source
PDB
Binding sites
PF01180

External resources

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

Other ligands for this protein

Quick navigation to other ligands bound to KP13_03859.

PDB 74

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

Ligand PDB entry

ChEMBL 100

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)