FAIRMol

OSA_Lib_224

Pose ID 11730 Compound 4973 Pose 209

DB SELECTIONDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T18
T. brucei TR (Mepacrine binding site (MBS, site 1)) T. brucei Mepacrine binding site (MBS, site 1)
Ligand OSA_Lib_224
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
Weak or marginal quality
Binding strong Geometry medium Native strong SASA done
Strain ΔE
36.9 kcal/mol
Protein clashes
1
Internal clashes
1
Native overlap
contact recall 0.62, Jaccard 0.42
Burial
60%
Hydrophobic fit
96%
Reason: no major geometry red flags detected
1 protein-contact 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 ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.576 kcal/mol/HA) ✓ Good fit quality (FQ -5.94) ✓ Good H-bonds (4 bonds) ✓ Good burial (60% SASA buried) ✓ Lipophilic contacts well-matched (96%) ✗ Very high strain energy (36.9 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (18)
Score
-21.899
kcal/mol
LE
-0.576
kcal/mol/HA
Fit Quality
-5.94
FQ (Leeson)
HAC
38
heavy atoms
MW
517
Da
LogP
1.67
cLogP
Final rank
4.2535
rank score
Inter norm
-0.639
normalised
Contacts
14
H-bonds 4
Strain ΔE
36.9 kcal/mol
SASA buried
60%
Lipo contact
96% BSA apolar/total
SASA unbound
807 Ų
Apolar buried
466 Ų

Interaction summary

HBD 1 HBA 3 HY 7 PI 2 CLASH 1

HBD/HBA · H-bonds (geometric)

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

PI · π–π interactions

Native π–π recall is disabled because no explicit native π–π reference was stored.

HY · Hydrophobic contacts

CLASH · Clashes

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
Name6RB5Contacts13
PoseOpen native poseHB0
IFP residues
ASP116 GLU18 GLY112 ILE106 LEU17 MET113 SER109 THR117 THR335 TRP21 TYR110 VAL53 VAL58
Current overlap8Native recall0.62
Jaccard0.42RMSD-
HB strict0Strict recall-
HB same residue+role0HB role recall-
HB same residue0HB residue recall-

Protein summary

493 residues
Protein targetT18Atoms7550
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
209 4.253493859938574 -0.638682 -21.8986 4 14 8 0.62 - - 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 -21.899kcal/mol
Ligand efficiency (LE) -0.5763kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -5.941
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 38HA

Physicochemical properties

Molecular weight 516.8Da
Lipinski: ≤ 500 Da
LogP (cLogP) 1.67
Lipinski: ≤ 5
Rotatable bonds 6

Conformational strain (MMFF94s)

Strain energy (ΔE) 36.94kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 256.97kcal/mol
Minimised FF energy 220.03kcal/mol

SASA & burial

✓ computed
SASA (unbound) 806.8Ų
Total solvent-accessible surface area of free ligand
BSA total 485.8Ų
Buried surface area upon binding
BSA apolar 466.2Ų
Hydrophobic contacts buried
BSA polar 19.6Ų
Polar contacts buried
Fraction buried 60.2%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 96.0%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3385.2Ų
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 1471.7Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)