FAIRMol

OSA_Lib_301

Pose ID 11038 Compound 4672 Pose 195

DB SELECTIONDocking pose analysis is being read from this database.
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_301
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 medium Native strong SASA done
Strain ΔE
18.6 kcal/mol
Protein clashes
3
Internal clashes
3
Native overlap
contact recall 0.83, Jaccard 0.45, H-bond role recall 1.00
Burial
86%
Hydrophobic fit
97%
Reason: no major geometry red flags detected
3 protein-contact clashes 3 intramolecular clashes
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.787 kcal/mol/HA) ✓ Good fit quality (FQ -7.67) ✓ Good H-bonds (4 bonds) ✓ Deep burial (86% SASA buried) ✓ Lipophilic contacts well-matched (97%) ✗ Moderate strain (18.6 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (14)
Score
-24.401
kcal/mol
LE
-0.787
kcal/mol/HA
Fit Quality
-7.67
FQ (Leeson)
HAC
31
heavy atoms
MW
413
Da
LogP
3.60
cLogP
Strain ΔE
18.6 kcal/mol
SASA buried
86%
Lipo contact
97% BSA apolar/total
SASA unbound
670 Ų
Apolar buried
557 Ų

Interaction summary

HB 4 HY 24 PI 2 CLASH 3
Final rank2.666Score-24.401
Inter norm-0.861Intra norm0.067
Top1000noExcludedno
Contacts20H-bonds4
Artifact reasongeometry warning; 14 clashes; 1 protein clash
Residues
ALA284 ALA365 ARG228 ARG287 ARG331 GLY195 GLY197 GLY286 ILE199 ILE285 LEU227 LEU332 LEU334 MET333 PHE198 PHE230 SER200 SER364 VAL201 VAL366

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

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
Jaccard0.45RMSD-
HB strict1Strict recall1.00
HB same residue+role1HB role recall1.00
HB same residue1HB residue recall1.00

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
195 2.6655785568386694 -0.860912 -24.4009 4 20 10 0.83 1.00 - no Current
275 4.090305856507783 -0.836428 -24.5932 4 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 -24.401kcal/mol
Ligand efficiency (LE) -0.7871kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -7.668
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 31HA

Physicochemical properties

Molecular weight 412.6Da
Lipinski: ≤ 500 Da
LogP (cLogP) 3.60
Lipinski: ≤ 5
Rotatable bonds 6

Conformational strain (MMFF94s)

Strain energy (ΔE) 18.56kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 106.14kcal/mol
Minimised FF energy 87.58kcal/mol

SASA & burial

✓ computed
SASA (unbound) 670.1Ų
Total solvent-accessible surface area of free ligand
BSA total 576.9Ų
Buried surface area upon binding
BSA apolar 557.0Ų
Hydrophobic contacts buried
BSA polar 19.9Ų
Polar contacts buried
Fraction buried 86.1%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 96.6%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -6657.4Ų
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 8063.1Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 2055.9Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)