Ligand profile

4NO

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

Bound to: KP13_05503 — Aspartate-semialdehyde dehydrogenase

Via homolog PDB 4r5m UniProt Q9KQG2 Formula C₇H₆NO₇P
Mol. weight 247.10 Da
Permeability Check
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
4NO
PDB
4r5m
UniProt (similar protein)
Q9KQG2
Target protein
KP13_05503

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 247.10 Da
LogP (Crippen) 0.10
H-bond donors 3
H-bond acceptors 4
TPSA 137.97 Ų
Rotatable bonds 3
Aromatic rings 1 / 1
Heavy atoms 16
Fraction sp³ C 0.00
Formula C₇H₆NO₇P

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 138.0
  • −1 ≤ LogP ≤ 5 0.10
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 247.1
  • LogP ≤ 5 0.10
  • H-bond donors ≤ 5 3
  • H-bond acceptors ≤ 10 4
Veber's rules Pass
  • Rotatable bonds ≤ 10 3
  • TPSA ≤ 140 Ų 138.0
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
c1cc(c(cc1[N+](=O)[O-])P(=O)(O)O)C(=O)O
InChI 
InChI=1S/C7H6NO7P/c9-7(10)5-2-1-4(8(11)12)3-6(5)16(13,14)15/h1-3H,(H,9,10)(H2,13,14,15)
InChIKey 
PFWUFGANONPVGT-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
PF01118' 'PF02774

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_05503.

PDB 3

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

Ligand PDB entry

ChEMBL 1

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)