FAIRMol

OSA_Lib_354

Pose ID 9782 Compound 4312 Pose 296

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_354
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
15.9 kcal/mol
Protein clashes
2
Internal clashes
2
Native overlap
contact recall 1.00, Jaccard 0.81
Burial
71%
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 (-0.865 kcal/mol/HA) ✓ Good fit quality (FQ -8.43) ✓ Good H-bonds (4 bonds) ✓ Deep burial (71% SASA buried) ✓ Lipophilic contacts well-matched (97%) ✗ Moderate strain (15.9 kcal/mol) ✗ Geometry warnings ✗ Protein-contact clashes (5) ✗ Many internal clashes (15)
Score
-26.829
kcal/mol
LE
-0.865
kcal/mol/HA
Fit Quality
-8.43
FQ (Leeson)
HAC
31
heavy atoms
MW
500
Da
LogP
6.15
cLogP
Strain ΔE
15.9 kcal/mol
SASA buried
71%
Lipo contact
97% BSA apolar/total
SASA unbound
716 Ų
Apolar buried
496 Ų

Interaction summary

HB 4 HY 20 PI 0 CLASH 2
Final rank1.771Score-26.829
Inter norm-0.763Intra norm-0.102
Top1000noExcludedno
Contacts16H-bonds4
Artifact reasongeometry warning; 15 clashes; 5 protein contact clashes
Residues
ALA209 ALA90 ARG74 ASN208 GLY214 GLY215 GLY85 LEU73 LYS211 LYS89 MET70 PHE83 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 overlap13Native recall1.00
Jaccard0.81RMSD-
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
141 1.1706970081307735 -1.04318 -31.7149 2 20 0 0.00 - - no Open
296 1.7709278570270426 -0.762985 -26.8287 4 16 13 1.00 - - 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 -26.829kcal/mol
Ligand efficiency (LE) -0.8654kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -8.431
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 31HA

Physicochemical properties

Molecular weight 500.3Da
Lipinski: ≤ 500 Da
LogP (cLogP) 6.15
Lipinski: ≤ 5
Rotatable bonds 4

Conformational strain (MMFF94s)

Strain energy (ΔE) 15.86kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 93.23kcal/mol
Minimised FF energy 77.37kcal/mol

SASA & burial

✓ computed
SASA (unbound) 716.3Ų
Total solvent-accessible surface area of free ligand
BSA total 509.6Ų
Buried surface area upon binding
BSA apolar 495.7Ų
Hydrophobic contacts buried
BSA polar 13.9Ų
Polar contacts buried
Fraction buried 71.1%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 97.3%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3080.1Ų
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 1627.3Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)