FAIRMol

OSA_Lib_4

Pose ID 10305 Compound 4504 Pose 140

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_4
PDB6RB5

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
31.5 kcal/mol
Protein clashes
1
Internal clashes
1
Native overlap
contact recall 0.67, Jaccard 0.44
Burial
70%
Hydrophobic fit
99%
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 (-0.699 kcal/mol/HA) ✓ Good fit quality (FQ -6.93) ✓ Good H-bonds (3 bonds) ✓ Deep burial (70% SASA buried) ✓ Lipophilic contacts well-matched (99%) ✗ Very high strain energy (31.5 kcal/mol) ✗ Geometry warnings ✗ Minor protein-contact clashes (4) ✗ Many internal clashes (10)
Score
-23.067
kcal/mol
LE
-0.699
kcal/mol/HA
Fit Quality
-6.93
FQ (Leeson)
HAC
33
heavy atoms
MW
446
Da
LogP
2.52
cLogP
Strain ΔE
31.5 kcal/mol
SASA buried
70%
Lipo contact
99% BSA apolar/total
SASA unbound
746 Ų
Apolar buried
515 Ų

Interaction summary

HB 3 HY 24 PI 1 CLASH 1

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

Final rank1.113Score-23.067
Inter norm-0.738Intra norm0.039
Top1000noExcludedno
Contacts14H-bonds3
Artifact reasongeometry warning; 10 clashes; 4 protein contact clashes; high strain Δ 31.5
Residues
ALA209 ALA90 GLY214 GLY215 GLY85 LEU73 LYS211 LYS89 MET70 PRO212 PRO213 TYR210 TYR69 VAL88

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 overlap8Native recall0.67
Jaccard0.44RMSD-
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
140 1.113366597556815 -0.737613 -23.067 3 14 8 0.67 - - 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 -23.067kcal/mol
Ligand efficiency (LE) -0.6990kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -6.935
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 33HA

Physicochemical properties

Molecular weight 445.7Da
Lipinski: ≤ 500 Da
LogP (cLogP) 2.52
Lipinski: ≤ 5
Rotatable bonds 6

Conformational strain (MMFF94s)

Strain energy (ΔE) 31.49kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 192.84kcal/mol
Minimised FF energy 161.36kcal/mol

SASA & burial

✓ computed
SASA (unbound) 745.9Ų
Total solvent-accessible surface area of free ligand
BSA total 518.5Ų
Buried surface area upon binding
BSA apolar 514.9Ų
Hydrophobic contacts buried
BSA polar 3.6Ų
Polar contacts buried
Fraction buried 69.5%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 99.3%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3343.7Ų
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 1475.1Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)