FAIRMol

OSA_Lib_223

Pose ID 9730 Compound 4423 Pose 244

DB SELECTIONDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T15
T. brucei TR (Dimer cleft site) T. brucei Dimer cleft site
Ligand OSA_Lib_223
PDB9IFF

3D complex viewer

Strict H-bonds Permissive H-bonds
Viewer legend
Protein receptor
Pocket residues
Cofactor context
Docked ligand
Overall assessment
Weak SASA cached
Weak or marginal quality
Binding strong Geometry medium Native strong SASA done
Strain ΔE
37.2 kcal/mol
Protein clashes
3
Internal clashes
3
Native overlap
contact recall 0.69, Jaccard 0.41
Burial
70%
Hydrophobic fit
95%
Reason: no major geometry red flags detected
3 protein-contact clashes 3 intramolecular clashes 39% of hydrophobic surface appears solvent-exposed (13/33 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
EcoTox / ADMET In-silico prediction only
Fish LC₅₀
Not classified (>100 mg/L)
Daphnia EC₅₀
Not classified (>100 mg/L)
Algae IC₅₀
Not classified (>100 mg/L)
Bioaccum.
Not B (BCF≤2000)
Persistent
No
ADMET alerts (in-silico)
hERG Low Ames Clear DILI Low
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.597 kcal/mol/HA) ✓ Good fit quality (FQ -6.19) ✓ Good H-bonds (4 bonds) ✓ Deep burial (70% SASA buried) ✓ Lipophilic contacts well-matched (95%) ✗ Very high strain energy (37.2 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (18)
Score
-23.266
kcal/mol
LE
-0.597
kcal/mol/HA
Fit Quality
-6.19
FQ (Leeson)
HAC
39
heavy atoms
MW
532
Da
LogP
0.64
cLogP
Final rank
3.1710
rank score
Inter norm
-0.765
normalised
Contacts
18
H-bonds 5
Strain ΔE
37.2 kcal/mol
SASA buried
70%
Lipo contact
95% BSA apolar/total
SASA unbound
886 Ų
Apolar buried
588 Ų

Interaction summary

HBD 2 HBA 2 HY 10 PI 0 CLASH 3

HBD/HBA · H-bonds (geometric)

HBD = ligand donates H · HBA = ligand accepts H · ~ = weak (≥110°). Mode: permissive. Residues: 3.

PI · π–π interactions

No pi · π–π interactions detected for this pose.

HY · Hydrophobic contacts

CLASH · Clashes

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: permissive.
Name9IFFContacts13
PoseOpen native poseHB0
IFP residues
ALA209 ARG74 ASN208 GLY214 GLY215 GLY85 LEU73 LYS211 MET70 PHE83 PRO212 PRO213 VAL88
Current overlap9Native recall0.69
Jaccard0.41RMSD-
HB strict0Strict recall-
HB same residue+role0HB role recall-
HB same residue0HB residue recall-

Protein summary

489 residues
Protein targetT15Atoms7420
Residues489Chains1
Residue summaryVAL:768; LYS:704; LEU:703; ILE:532; GLU:450; THR:434; ARG:408; PHE:400; ALA:390; ASN:350; PRO:350; GLY:336; SER:319; TYR:294; ASP:264; MET:204

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
244 3.1710040800499883 -0.764584 -23.2661 5 18 9 0.69 - - no Current

Molecular metrics

RDKit SASA burial, strain energy (MMFF94s), ligand efficiency and fit quality for this docking pose.
✓ Metrics available

Scoring & efficiency

Docking score -23.266kcal/mol
Ligand efficiency (LE) -0.5966kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -6.191
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 39HA

Physicochemical properties

Molecular weight 531.8Da
Lipinski: ≤ 500 Da
LogP (cLogP) 0.64
Lipinski: ≤ 5
Rotatable bonds 7

Conformational strain (MMFF94s)

Strain energy (ΔE) 37.20kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 265.29kcal/mol
Minimised FF energy 228.09kcal/mol

SASA & burial

✓ computed
SASA (unbound) 885.5Ų
Total solvent-accessible surface area of free ligand
BSA total 616.7Ų
Buried surface area upon binding
BSA apolar 587.7Ų
Hydrophobic contacts buried
BSA polar 28.9Ų
Polar contacts buried
Fraction buried 69.6%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 95.3%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3315.0Ų
SASA_nonpolar(complex) − SASA_nonpolar(receptor) − SASA_nonpolar(ligand free). Negative = non-polar surface buried upon binding. Requires full polarity-decomposed SASA computation.
Receptor non-polar SASA 4005.2Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1539.6Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)