FAIRMol

OSA_Lib_167

Pose ID 10377 Compound 4418 Pose 212

DB SELECTIONDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T16
T. brucei TR (Dimer interface (site 2)) T. brucei Dimer interface (site 2)
Ligand OSA_Lib_167
PDB6RB5

3D complex viewer

Strict H-bonds Permissive H-bonds
Viewer legend
Protein receptor
Pocket residues
Cofactor context
Docked ligand
Overall assessment
Weak SASA cached
Promising but geometrically suspicious
Binding strong Geometry low Native strong SASA done
Strain ΔE
13.4 kcal/mol
Protein clashes
0
Internal clashes
13
Native overlap
contact recall 0.75, Jaccard 0.53
Burial
74%
Hydrophobic fit
99%
Reason: 13 internal clashes
13 intramolecular clashes
EcoTox / ADMET In-silico prediction only
Fish LC₅₀
Cat. 1 — Very toxic (≤1 mg/L)
Daphnia EC₅₀
Cat. 1 — Very toxic (≤1 mg/L)
Algae IC₅₀
Cat. 1 — Very toxic (≤1 mg/L)
Bioaccum.
Not B (BCF≤2000)
Persistent
No
ADMET alerts (in-silico)
hERG Medium Ames Clear DILI Risk
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.887 kcal/mol/HA) ✓ Good fit quality (FQ -8.47) ✓ Deep burial (74% SASA buried) ✓ Lipophilic contacts well-matched (99%) ✗ Moderate strain (13.4 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (13)
Score
-25.732
kcal/mol
LE
-0.887
kcal/mol/HA
Fit Quality
-8.47
FQ (Leeson)
HAC
29
heavy atoms
MW
430
Da
LogP
4.82
cLogP
Final rank
3.1734
rank score
Inter norm
-0.902
normalised
Contacts
14
H-bonds 2
Strain ΔE
13.4 kcal/mol
SASA buried
74%
Lipo contact
99% BSA apolar/total
SASA unbound
678 Ų
Apolar buried
493 Ų

Interaction summary

HBD 2 HY 9 PI 0 CLASH 0

HBD/HBA · H-bonds (geometric)

HBD = ligand donates H · HBA = ligand accepts H · ~ = weak (≥110°). Mode: strict. Residues: 2.

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.
Name6RB5Contacts12
PoseOpen native poseHB0
IFP residues
ALA90 ARG74 GLY85 LEU73 LYS89 MET70 PHE83 PRO212 PRO213 SER86 SER87 VAL88
Current overlap9Native recall0.75
Jaccard0.53RMSD-
HB strict0Strict recall-
HB same residue+role0HB role recall-
HB same residue0HB residue recall-

Protein summary

493 residues
Protein targetT16Atoms7551
Residues493Chains1
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:276; MET:221

Receptor context

1 kept / 0 excluded
Receptor context filtering: interactions and SASA are computed against protein atoms plus allowed cofactors/ions. Native ligand-like HETATM partners are excluded from scoring.
Kept context 1 Excluded HETATM 0
Kept cofactors / ions
A:FAD501

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
241 3.11230577479569 -0.938584 -25.7805 2 14 0 0.00 - - no Open
212 3.1733977709319365 -0.901724 -25.7316 2 14 9 0.75 - - 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 -25.732kcal/mol
Ligand efficiency (LE) -0.8873kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -8.470
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 29HA

Physicochemical properties

Molecular weight 430.4Da
Lipinski: ≤ 500 Da
LogP (cLogP) 4.82
Lipinski: ≤ 5
Rotatable bonds 3

Conformational strain (MMFF94s)

Strain energy (ΔE) 13.44kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 92.40kcal/mol
Minimised FF energy 78.96kcal/mol

SASA & burial

✓ computed
SASA (unbound) 677.6Ų
Total solvent-accessible surface area of free ligand
BSA total 499.0Ų
Buried surface area upon binding
BSA apolar 492.9Ų
Hydrophobic contacts buried
BSA polar 6.2Ų
Polar contacts buried
Fraction buried 73.6%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 98.8%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3276.4Ų
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 4076.6Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1470.5Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)