FAIRMol

OSA_Lib_378

Pose ID 9784 Compound 4475 Pose 298

DB SELECTIONDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T15
T. brucei TR (Dimer cleft site) T. brucei Dimer cleft site
Ligand OSA_Lib_378
PDB9IFF

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
19.6 kcal/mol
Protein clashes
1
Internal clashes
1
Native overlap
contact recall 0.69, Jaccard 0.53
Burial
72%
Hydrophobic fit
90%
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 (-0.722 kcal/mol/HA) ✓ Good fit quality (FQ -6.96) ✓ Good H-bonds (3 bonds) ✓ Deep burial (72% SASA buried) ✓ Lipophilic contacts well-matched (90%) ✗ Moderate strain (19.6 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (12)
Score
-21.659
kcal/mol
LE
-0.722
kcal/mol/HA
Fit Quality
-6.96
FQ (Leeson)
HAC
30
heavy atoms
MW
409
Da
LogP
1.45
cLogP
Strain ΔE
19.6 kcal/mol
SASA buried
72%
Lipo contact
90% BSA apolar/total
SASA unbound
690 Ų
Apolar buried
446 Ų

Interaction summary

HB 3 HY 24 PI 0 CLASH 1
Final rank4.104Score-21.659
Inter norm-0.809Intra norm0.087
Top1000noExcludedno
Contacts13H-bonds3
Artifact reasongeometry warning; 12 clashes; 3 protein clashes
Residues
ALA209 ALA90 GLY215 GLY85 LEU73 LYS211 LYS89 MET70 PRO187 PRO212 PRO213 TYR210 VAL88

Protein summary

489 residues
Protein targetT15Atoms7420
Residues489Chains1
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:204

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
Name9IFFContacts13
PoseOpen native poseHB0
IFP residues
ALA209 ARG74 ASN208 GLY214 GLY215 GLY85 LEU73 LYS211 MET70 PHE83 PRO212 PRO213 VAL88
Current overlap9Native recall0.69
Jaccard0.53RMSD-
HB strict0Strict recall-
HB same residue+role0HB role recall-
HB same residue0HB residue recall-

HB · H-bonds

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

PI · π–π interactions

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

HY · Hydrophobic contacts

CLASH · Clashes

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
293 3.358394155551145 -0.780713 -25.5585 3 12 0 0.00 - - no Open
298 4.104390979747763 -0.808638 -21.6588 3 13 9 0.69 - - 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 -21.659kcal/mol
Ligand efficiency (LE) -0.7220kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -6.964
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 30HA

Physicochemical properties

Molecular weight 408.6Da
Lipinski: ≤ 500 Da
LogP (cLogP) 1.45
Lipinski: ≤ 5
Rotatable bonds 6

Conformational strain (MMFF94s)

Strain energy (ΔE) 19.58kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 191.39kcal/mol
Minimised FF energy 171.81kcal/mol

SASA & burial

✓ computed
SASA (unbound) 689.9Ų
Total solvent-accessible surface area of free ligand
BSA total 493.8Ų
Buried surface area upon binding
BSA apolar 445.6Ų
Hydrophobic contacts buried
BSA polar 48.2Ų
Polar contacts buried
Fraction buried 71.6%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 90.2%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3116.5Ų
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 4005.2Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1524.7Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)