FAIRMol

OSA_Lib_326

Pose ID 10451 Compound 4435 Pose 286

DB fairmolDocking 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_326
PDB6RB5

3D complex viewer

Strict H-bonds Permissive H-bonds
Viewer legend
Protein receptor
Pocket residues
Cofactor context
Docked ligand
Overall assessment
Promising SASA cached
Promising and worth follow-up
Binding strong Geometry medium Native strong SASA done
Strain ΔE
14.4 kcal/mol
Protein clashes
5
Internal clashes
5
Native overlap
contact recall 0.58, Jaccard 0.39
Burial
70%
Hydrophobic fit
97%
Reason: no major geometry red flags detected
5 protein-contact clashes 5 intramolecular clashes
Molecular report
Full metrics ↗
Promising Reasonable quality metrics. Warrants further investigation.
✓ Excellent LE (-0.941 kcal/mol/HA) ✓ Good fit quality (FQ -8.78) ✓ Good H-bonds (4 bonds) ✓ Deep burial (70% SASA buried) ✓ Lipophilic contacts well-matched (97%) ✗ Moderate strain (14.4 kcal/mol) ✗ Geometry warnings ✗ Internal clashes (9)
Score
-25.406
kcal/mol
LE
-0.941
kcal/mol/HA
Fit Quality
-8.78
FQ (Leeson)
HAC
27
heavy atoms
MW
363
Da
LogP
2.96
cLogP
Final rank
2.7314
rank score
Inter norm
-0.930
normalised
Contacts
13
H-bonds 4
Strain ΔE
14.4 kcal/mol
SASA buried
70%
Lipo contact
97% BSA apolar/total
SASA unbound
629 Ų
Apolar buried
424 Ų

Interaction summary

HBD 3 HBA 1 HY 5 PI 0 CLASH 5

HBD/HBA · H-bonds (geometric)

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

PI · π–π interactions

No pi · π–π interactions detected for this pose.

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.
Name6RB5Contacts12
PoseOpen native poseHB0
IFP residues
ALA90 ARG74 GLY85 LEU73 LYS89 MET70 PHE83 PRO212 PRO213 SER86 SER87 VAL88
Current overlap7Native recall0.58
Jaccard0.39RMSD-
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
286 2.7314160812849373 -0.929888 -25.406 4 13 7 0.58 - - no Current
290 3.310908501403731 -1.02551 -28.4166 5 13 0 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 -25.406kcal/mol
Ligand efficiency (LE) -0.9410kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -8.779
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 27HA

Physicochemical properties

Molecular weight 362.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 2.96
Lipinski: ≤ 5
Rotatable bonds 4

Conformational strain (MMFF94s)

Strain energy (ΔE) 14.39kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 109.60kcal/mol
Minimised FF energy 95.21kcal/mol

SASA & burial

✓ computed
SASA (unbound) 629.2Ų
Total solvent-accessible surface area of free ligand
BSA total 437.1Ų
Buried surface area upon binding
BSA apolar 423.7Ų
Hydrophobic contacts buried
BSA polar 13.5Ų
Polar contacts buried
Fraction buried 69.5%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 96.9%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3220.8Ų
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 1467.3Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)