FAIRMol

OSA_Lib_263

Pose ID 11034 Compound 4721 Pose 191

DB fairmolDocking pose analysis is being read from this database.
Compound detail Protein structures Back to compounds
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T17
T. brucei TR (Doorstop site) T. brucei Doorstop site
Ligand OSA_Lib_263
PDB5S9T↗

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 high Native strong SASA done
Strain ΔE
26.8 kcal/mol
Protein clashes
2
Internal clashes
2
Native overlap
contact recall 0.83, Jaccard 0.42, H-bond role recall 0.00
Burial
80%
Hydrophobic fit
97%
Reason: no major geometry red flags detected
2 protein-contact clashes
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.596 kcal/mol/HA) ✓ Good fit quality (FQ -6.18) ✓ Deep burial (80% SASA buried) ✓ Lipophilic contacts well-matched (97%) ✗ High strain energy (26.8 kcal/mol) ✗ Geometry warnings ✗ Minor protein-contact clashes (3) ✗ Many internal clashes (16)
Score
-23.225
kcal/mol
LE
-0.596
kcal/mol/HA
Fit Quality
-6.18
FQ (Leeson)
HAC
39
heavy atoms
MW
522
Da
LogP
2.86
cLogP
Final rank
1.6314
rank score
Inter norm
-0.608
normalised
Contacts
22
H-bonds 1
Strain ΔE
26.8 kcal/mol
SASA buried
80%
Lipo contact
97% BSA apolar/total
SASA unbound
828 Ų
Apolar buried
642 Ų

Interaction summary

HBD 1 HY 8 PI 4 CLASH 2

HBD/HBA · H-bonds (geometric)
HBD = ligand donates H · HBA = ligand accepts H · ~ = weak (≥110°). Mode: strict. Residues: 1.

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.
Name5S9TContacts12
PoseOpen native poseHB0
IFP residues
ALA365 ARG228 ARG331 GLY229 LEU332 LEU334 MET333 PHE198 PHE230 SER364 THR374 VAL366
Current overlap10Native recall0.83
Jaccard0.42RMSD-
HB strict0Strict recall0.00
HB same residue+role0HB role recall0.00
HB same residue0HB residue recall0.00

Protein summary

1033 residues
Protein targetT17Atoms15160
Residues1033Chains2
Residue summaryVAL:1536; LEU:1387; LYS:1386; ILE:1064; GLU:900; THR:868; ARG:816; PHE:800; ALA:780; ASN:700; PRO:686; GLY:672; SER:616; TYR:588; ASP:528; MET:408

Receptor context

2 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 2 Excluded HETATM 0
Kept cofactors / ions
A:FAD501 B:FAD501

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
191 1.6314184820002882 -0.608123 -23.2254 1 22 10 0.83 0.00 - no Current
215 2.554179479926247 -0.618458 -23.1412 1 15 0 0.00 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 -23.225kcal/mol
Ligand efficiency (LE) -0.5955kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -6.180
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 39HA

Physicochemical properties
Molecular weight 521.8Da
Lipinski: ≤ 500 Da
LogP (cLogP) 2.86
Lipinski: ≤ 5
Rotatable bonds 5

Conformational strain (MMFF94s)
Strain energy (ΔE) 26.84kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 198.48kcal/mol
Minimised FF energy 171.64kcal/mol

SASA & burial

✓ computed
SASA (unbound) 828.0Ų
Total solvent-accessible surface area of free ligand
BSA total 658.7Ų
Buried surface area upon binding
BSA apolar 641.5Ų
Hydrophobic contacts buried
BSA polar 17.2Ų
Polar contacts buried
Fraction buried 79.6%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 97.4%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -6827.7Ų
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 8063.1Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 2044.9Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)