Ligand profile

URF

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

Bound to: VK055_4689 — uracil phosphoribosyltransferase

Via homolog PDB 1upf UniProt Q26998 Formula C₄H₃FN₂O₂
Mol. weight 130.08 Da
Permeability High
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
URF
PDB
1upf
UniProt (similar protein)
Q26998
Target protein
VK055_4689

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 130.08 Da
LogP (Crippen) -0.80
H-bond donors 2
H-bond acceptors 2
TPSA 65.72 Ų
Rotatable bonds 0
Aromatic rings 1 / 1
Heavy atoms 9
Fraction sp³ C 0.00
Formula C₄H₃FN₂O₂

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 65.7
  • −1 ≤ LogP ≤ 5 -0.80
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 130.1
  • LogP ≤ 5 -0.80
  • H-bond donors ≤ 5 2
  • H-bond acceptors ≤ 10 2
Veber's rules Pass
  • Rotatable bonds ≤ 10 0
  • TPSA ≤ 140 Ų 65.7
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
C1=C(C(=O)NC(=O)N1)F
InChI 
InChI=1S/C4H3FN2O2/c5-2-1-6-4(9)7-3(2)8/h1H,(H2,6,7,8,9)
InChIKey 
GHASVSINZRGABV-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
PF14681

External resources

Open this ligand in third-party databases and cheminformatics tools.

Other ligands for this protein

Quick navigation to other ligands bound to VK055_4689.

PDB 1

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

Ligand PDB entry

ZINC 2

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

Compound Similarity (Tanimoto)