FAIRMol

OSA_Lib_81

Pose ID 10348 Compound 4627 Pose 183

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_81
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 high Native strong SASA done
Strain ΔE
28.8 kcal/mol
Protein clashes
1
Internal clashes
1
Native overlap
contact recall 0.75, Jaccard 0.43
Burial
75%
Hydrophobic fit
98%
Reason: no major geometry red flags detected
1 protein-contact clashes 45% of hydrophobic surface appears solvent-exposed (15/33 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
EcoTox / ADMET In-silico prediction only
Fish LC₅₀
Not classified (>100 mg/L)
Daphnia EC₅₀
Not classified (>100 mg/L)
Algae IC₅₀
Cat. 3 — Harmful (10–100 mg/L)
Bioaccum.
Not B (BCF≤2000)
Persistent
No
ADMET alerts (in-silico)
hERG Medium Ames Clear DILI Low
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.710 kcal/mol/HA) ✓ Good fit quality (FQ -7.32) ✓ Good H-bonds (3 bonds) ✓ Deep burial (75% SASA buried) ✓ Lipophilic contacts well-matched (98%) ✗ High strain energy (28.8 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (17)
Score
-26.977
kcal/mol
LE
-0.710
kcal/mol/HA
Fit Quality
-7.32
FQ (Leeson)
HAC
38
heavy atoms
MW
519
Da
LogP
2.52
cLogP
Final rank
3.1795
rank score
Inter norm
-0.720
normalised
Contacts
18
H-bonds 3
Strain ΔE
28.8 kcal/mol
SASA buried
75%
Lipo contact
98% BSA apolar/total
SASA unbound
866 Ų
Apolar buried
634 Ų

Interaction summary

HBD 2 HBA 1 HY 8 PI 0 CLASH 1

HBD/HBA · H-bonds (geometric)

HBD = ligand donates H · HBA = ligand accepts H · ~ = weak (≥110°). Mode: strict. Residues: 2.

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 overlap9Native recall0.75
Jaccard0.43RMSD-
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
190 2.5384219327376734 -0.540884 -18.517 3 14 0 0.00 - - no Open
183 3.1794896213932016 -0.719505 -26.977 3 18 9 0.75 - - 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 -26.977kcal/mol
Ligand efficiency (LE) -0.7099kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -7.319
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 38HA

Physicochemical properties

Molecular weight 518.7Da
Lipinski: ≤ 500 Da
LogP (cLogP) 2.52
Lipinski: ≤ 5
Rotatable bonds 8

Conformational strain (MMFF94s)

Strain energy (ΔE) 28.77kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 97.33kcal/mol
Minimised FF energy 68.56kcal/mol

SASA & burial

✓ computed
SASA (unbound) 866.3Ų
Total solvent-accessible surface area of free ligand
BSA total 647.2Ų
Buried surface area upon binding
BSA apolar 633.7Ų
Hydrophobic contacts buried
BSA polar 13.6Ų
Polar contacts buried
Fraction buried 74.7%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 97.9%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3467.1Ų
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 4076.6Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1443.8Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)