FAIRMol

OSA_Lib_182

Pose ID 9716 Compound 4395 Pose 230

DB fairmolDocking 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_182
PDB9IFF

3D complex viewer

Strict H-bonds Permissive H-bonds
Viewer legend
Protein receptor
Pocket residues
Cofactor context
Docked ligand
Overall assessment
Reject SASA cached
Promising but geometrically suspicious
Binding strong Geometry low Native strong SASA done
Strain ΔE
52.1 kcal/mol
Protein clashes
0
Internal clashes
18
Native overlap
contact recall 0.69, Jaccard 0.45
Burial
78%
Hydrophobic fit
100%
Reason: 18 internal clashes, strain 52.1 kcal/mol
strain ΔE 52.1 kcal/mol 18 intramolecular clashes
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 ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Excellent LE (-0.463 kcal/mol/HA) ✓ Good fit quality (FQ -4.71) ✓ Good H-bonds (3 bonds) ✓ Deep burial (78% SASA buried) ✓ Lipophilic contacts well-matched (100%) ✗ Extreme strain energy (52.1 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (18)
Score
-16.679
kcal/mol
LE
-0.463
kcal/mol/HA
Fit Quality
-4.71
FQ (Leeson)
HAC
36
heavy atoms
MW
490
Da
LogP
0.94
cLogP
Final rank
2.8623
rank score
Inter norm
-0.745
normalised
Contacts
16
H-bonds 3
Strain ΔE
52.1 kcal/mol
SASA buried
78%
Lipo contact
100% BSA apolar/total
SASA unbound
820 Ų
Apolar buried
638 Ų

Interaction summary

HBD 3 HY 10 PI 0 CLASH 0

HBD/HBA · H-bonds (geometric)

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

PI · π–π interactions

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

HY · Hydrophobic contacts

CLASH · Clashes

No clash · clashes detected for this pose.

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
Name9IFFContacts13
PoseOpen native poseHB0
IFP residues
ALA209 ARG74 ASN208 GLY214 GLY215 GLY85 LEU73 LYS211 MET70 PHE83 PRO212 PRO213 VAL88
Current overlap9Native recall0.69
Jaccard0.45RMSD-
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
230 2.8622580520007013 -0.744836 -16.6786 3 16 9 0.69 - - no Current
223 3.9296778211806793 -0.668732 -20.9295 3 14 0 0.00 - - no Open

Molecular metrics

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

Scoring & efficiency

Docking score -16.679kcal/mol
Ligand efficiency (LE) -0.4633kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -4.709
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 36HA

Physicochemical properties

Molecular weight 489.8Da
Lipinski: ≤ 500 Da
LogP (cLogP) 0.94
Lipinski: ≤ 5
Rotatable bonds 8

Conformational strain (MMFF94s)

Strain energy (ΔE) 52.09kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 332.44kcal/mol
Minimised FF energy 280.35kcal/mol

SASA & burial

✓ computed
SASA (unbound) 820.0Ų
Total solvent-accessible surface area of free ligand
BSA total 638.9Ų
Buried surface area upon binding
BSA apolar 638.3Ų
Hydrophobic contacts buried
BSA polar 0.7Ų
Polar contacts buried
Fraction buried 77.9%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 99.9%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3280.7Ų
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 1543.9Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)