Ligand profile

5AJ

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

Bound to: KP13_02430 — putative inorganic polyphosphate/ATP-NAD kinase

Via homolog PDB 5dhr UniProt Q8Y8D7 Formula C₂₁H₂₃N₁₁O₄S
Mol. weight 525.56 Da
Permeability Check
PAINS Alert

Identifiers

Database identifiers and provenance.

Ligand ID
5AJ
PDB
5dhr
UniProt (similar protein)
Q8Y8D7
Target protein
KP13_02430

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 525.56 Da
LogP (Crippen) 0.67
H-bond donors 5
H-bond acceptors 12
TPSA 225.85 Ų
Rotatable bonds 9
Aromatic rings 4 / 5
Heavy atoms 37
Fraction sp³ C 0.38
Formula C₂₁H₂₃N₁₁O₄S

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 225.8
  • −1 ≤ LogP ≤ 5 0.67
Lipinski's Rule of Five Fail 2 violations
  • MW ≤ 500 Da 525.6
  • LogP ≤ 5 0.67
  • H-bond donors ≤ 5 5
  • H-bond acceptors ≤ 10 12
Veber's rules Fail
  • Rotatable bonds ≤ 10 9
  • TPSA ≤ 140 Ų 225.8
PAINS Alert

Matches PAINS filter: azo_A(324). May be a frequent false positive in HTS — review carefully.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
c1ccc2c(c1)[nH]c(n2)CCNC(=O)CSc3nc4c(ncnc4n3[C@H]5[C@@H]([C@@H]([C@H](O5)CN=[N+]=[N-])O)O)N
InChI 
InChI=1S/C21H23N11O4S/c22-18-15-19(26-9-25-18)32(20-17(35)16(34)12(36-20)7-27-31-23)21(30-15)37-8-14(33)24-6-5-13-28-10-3-1-2-4-11(10)29-13/h1-4,9,12,16-17,20,34-35H,5-8H2,(H,24,33)(H,28,29)(H2,22,25,26)/t12-,16-,17-,20-/m1/s1
InChIKey 
QNDDYPVSXWRDOZ-QQRWZLOUSA-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
PF01513' 'PF20143

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_02430.

PDB 51

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

Ligand PDB entry

ChEMBL 3

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)