Ligand profile

TST

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

Bound to: KP13_01972 — FKBP-type 16 kDa peptidyl-prolyl cis-trans isomerase

Via homolog PDB 1j4i UniProt P62942 Formula C₁₈H₂₆N₂O₅S₂
Mol. weight 414.55 Da
Permeability Check
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
TST
PDB
1j4i
UniProt (similar protein)
P62942
Target protein
KP13_01972

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 414.55 Da
LogP (Crippen) 1.72
H-bond donors 2
H-bond acceptors 5
TPSA 103.78 Ų
Rotatable bonds 7
Aromatic rings 1 / 2
Heavy atoms 27
Fraction sp³ C 0.56
Formula C₁₈H₂₆N₂O₅S₂

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 103.8
  • −1 ≤ LogP ≤ 5 1.72
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 414.5
  • LogP ≤ 5 1.72
  • H-bond donors ≤ 5 2
  • H-bond acceptors ≤ 10 5
Veber's rules Pass
  • Rotatable bonds ≤ 10 7
  • TPSA ≤ 140 Ų 103.8
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
Cc1ccc(cc1)S(=O)(=O)N2CCSC[C@H]2C(=O)N[C@@H](CC(C)C)C(=O)O
InChI 
InChI=1S/C18H26N2O5S2/c1-12(2)10-15(18(22)23)19-17(21)16-11-26-9-8-20(16)27(24,25)14-6-4-13(3)5-7-14/h4-7,12,15-16H,8-11H2,1-3H3,(H,19,21)(H,22,23)/t15-,16-/m0/s1
InChIKey 
GFEHACHKMVZGNQ-HOTGVXAUSA-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
PF00254

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_01972.

PDB 24

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)