Ligand profile

1X5

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

Bound to: KP13_03859 — Dihydroorotate dehydrogenase

Via homolog PDB 3kvj UniProt Q02127 Formula C₁₈H₁₉N₃O₃
Mol. weight 325.37 Da
Permeability High
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
1X5
PDB
3kvj
UniProt (similar protein)
Q02127
Target protein
KP13_03859

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 325.37 Da
LogP (Crippen) 2.76
H-bond donors 2
H-bond acceptors 4
TPSA 82.53 Ų
Rotatable bonds 6
Aromatic rings 2 / 3
Heavy atoms 24
Fraction sp³ C 0.28
Formula C₁₈H₁₉N₃O₃

Drug-likeness

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

Permeability proxy High

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 82.5
  • −1 ≤ LogP ≤ 5 2.76
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 325.4
  • LogP ≤ 5 2.76
  • H-bond donors ≤ 5 2
  • H-bond acceptors ≤ 10 4
Veber's rules Pass
  • Rotatable bonds ≤ 10 6
  • TPSA ≤ 140 Ų 82.5
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
CN(Cc1cccnc1)c2ccc(c(c2)C(=O)O)NC(=O)C3CC3
InChI 
InChI=1S/C18H19N3O3/c1-21(11-12-3-2-8-19-10-12)14-6-7-16(15(9-14)18(23)24)20-17(22)13-4-5-13/h2-3,6-10,13H,4-5,11H2,1H3,(H,20,22)(H,23,24)
InChIKey 
XLLCMCCHDIWDPC-UHFFFAOYSA-N

Provenance

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

Method
LigQ nearest_k
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)