FAIRMol

OSA_Lib_184

Pose ID 13080 Compound 5292 Pose 201

DB SELECTIONDocking 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
T20
T. brucei TR (Z-site (fragment hotspot)) T. brucei Z-site (fragment hotspot)
Ligand OSA_Lib_184
PDB9IFH↗

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
20.8 kcal/mol
Protein clashes
1
Internal clashes
1
Native overlap
contact recall 0.88, Jaccard 0.64, H-bond role recall 0.00
Burial
52%
Hydrophobic fit
94%
Reason: no major geometry red flags detected
1 protein-contact clashes
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.467 kcal/mol/HA) ✓ Good fit quality (FQ -4.75) ✓ Good H-bonds (3 bonds) ✓ Good burial (52% SASA buried) ✓ Lipophilic contacts well-matched (94%) ✗ High strain energy (20.8 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (18)
Score
-16.805
kcal/mol
LE
-0.467
kcal/mol/HA
Fit Quality
-4.75
FQ (Leeson)
HAC
36
heavy atoms
MW
491
Da
LogP
1.74
cLogP
Strain ΔE
20.8 kcal/mol
SASA buried
52%
Lipo contact
94% BSA apolar/total
SASA unbound
820 Ų
Apolar buried
399 Ų

Interaction summary

HB 3 HY 24 PI 1 CLASH 1
Final rank4.071Score-16.805
Inter norm-0.550Intra norm0.083
Top1000noExcludedno
Contacts10H-bonds3
Artifact reasongeometry warning; 18 clashes; 2 protein clashes; moderate strain Δ 20.8
Residues
ASN402 GLU466 GLU467 LEU399 PHE396 PRO398 PRO462 SER394 THR397 THR463

Protein summary

492 residues
Protein targetT20Atoms7539
Residues492Chains1
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: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

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
Name9IFHContacts8
PoseOpen native poseHB0
IFP residues
ASN402 GLU467 LEU399 PHE396 PRO398 SER394 SER470 THR397
Current overlap7Native recall0.88
Jaccard0.64RMSD-
HB strict0Strict recall0.00
HB same residue+role0HB role recall0.00
HB same residue0HB residue recall0.00

HB · H-bonds
Mode: strict. Count shows atom-level H-bonds; unique residues in summary: 0.

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

HY · Hydrophobic contacts

CLASH · Clashes

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
201 4.070783575382794 -0.549732 -16.8051 3 10 7 0.88 0.00 - 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 -16.805kcal/mol
Ligand efficiency (LE) -0.4668kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -4.745
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 36HA

Physicochemical properties
Molecular weight 490.7Da
Lipinski: ≤ 500 Da
LogP (cLogP) 1.74
Lipinski: ≤ 5
Rotatable bonds 8

Conformational strain (MMFF94s)
Strain energy (ΔE) 20.84kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 216.53kcal/mol
Minimised FF energy 195.68kcal/mol

SASA & burial

✓ computed
SASA (unbound) 819.6Ų
Total solvent-accessible surface area of free ligand
BSA total 424.9Ų
Buried surface area upon binding
BSA apolar 399.0Ų
Hydrophobic contacts buried
BSA polar 25.9Ų
Polar contacts buried
Fraction buried 51.8%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 93.9%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3332.2Ų
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 4069.8Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1530.5Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)