Ligand profile

NCA

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

Bound to: KP13_04479 — Putative NADP-dependent oxidoreductase

Via homolog PDB 2zb7 UniProt Q8N8N7 Formula C₆H₆N₂O
Mol. weight 122.13 Da
Permeability High
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
NCA
PDB
2zb7
UniProt (similar protein)
Q8N8N7
Target protein
KP13_04479

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 122.13 Da
LogP (Crippen) 0.18
H-bond donors 1
H-bond acceptors 2
TPSA 55.98 Ų
Rotatable bonds 1
Aromatic rings 1 / 1
Heavy atoms 9
Fraction sp³ C 0.00
Formula C₆H₆N₂O

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 56.0
  • −1 ≤ LogP ≤ 5 0.18
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 122.1
  • LogP ≤ 5 0.18
  • H-bond donors ≤ 5 1
  • H-bond acceptors ≤ 10 2
Veber's rules Pass
  • Rotatable bonds ≤ 10 1
  • TPSA ≤ 140 Ų 56.0
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
c1cc(cnc1)C(=O)N
InChI 
InChI=1S/C6H6N2O/c7-6(9)5-2-1-3-8-4-5/h1-4H,(H2,7,9)
InChIKey 
DFPAKSUCGFBDDF-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
PF00107' 'PF16884

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_04479.

PDB 8

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

Ligand PDB entry

ZINC 50

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

Compound Similarity (Tanimoto)