Ligand profile

3XS

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

Bound to: KP13_03859 — Dihydroorotate dehydrogenase

Via homolog PDB 4ls2 UniProt Q02127 Formula C₁₈H₁₅N₃O₃S
Mol. weight 353.40 Da
Permeability High
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
3XS
PDB
4ls2
UniProt (similar protein)
Q02127
Target protein
KP13_03859

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 353.40 Da
LogP (Crippen) 3.96
H-bond donors 2
H-bond acceptors 6
TPSA 83.81 Ų
Rotatable bonds 6
Aromatic rings 3 / 3
Heavy atoms 25
Fraction sp³ C 0.06
Formula C₁₈H₁₅N₃O₃S

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 83.8
  • −1 ≤ LogP ≤ 5 3.96
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 353.4
  • LogP ≤ 5 3.96
  • H-bond donors ≤ 5 2
  • H-bond acceptors ≤ 10 6
Veber's rules Pass
  • Rotatable bonds ≤ 10 6
  • TPSA ≤ 140 Ų 83.8
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
COc1cccc(c1)c2csc(n2)N/N=C/c3ccccc3C(=O)O
InChI 
InChI=1S/C18H15N3O3S/c1-24-14-7-4-6-12(9-14)16-11-25-18(20-16)21-19-10-13-5-2-3-8-15(13)17(22)23/h2-11H,1H3,(H,20,21)(H,22,23)/b19-10+
InChIKey 
CRNTYYFZANKWHU-VXLYETTFSA-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)