FAIRMol

OSA_Lib_82

Pose ID 9676 Compound 4443 Pose 190

DB fairmolDocking 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_82
PDB9IFF

3D complex viewer

Strict H-bonds Permissive H-bonds
Viewer legend
Protein receptor
Pocket residues
Cofactor context
Docked ligand
Overall assessment
Reject SASA cached
Promising but geometrically suspicious
Binding strong Geometry low Native strong SASA done
Strain ΔE
42.0 kcal/mol
Protein clashes
4
Internal clashes
4
Native overlap
contact recall 0.85, Jaccard 0.50
Burial
75%
Hydrophobic fit
93%
Reason: strain 42.0 kcal/mol
strain ΔE 42.0 kcal/mol 4 protein-contact clashes 4 intramolecular clashes 41% of hydrophobic surface appears solvent-exposed (13/32 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
EcoTox / ADMET In-silico prediction only
Fish LC₅₀
Cat. 3 — Harmful (10–100 mg/L)
Daphnia EC₅₀
Cat. 3 — Harmful (10–100 mg/L)
Algae IC₅₀
Cat. 3 — Harmful (10–100 mg/L)
Bioaccum.
Not B (BCF≤2000)
Persistent
No
ADMET alerts (in-silico)
hERG High Ames Clear DILI Low
Molecular report
Full metrics ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Excellent LE (-0.690 kcal/mol/HA) ✓ Good fit quality (FQ -7.07) ✓ Deep burial (75% SASA buried) ✓ Lipophilic contacts well-matched (93%) ✗ Extreme strain energy (42.0 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (15)
Score
-25.544
kcal/mol
LE
-0.690
kcal/mol/HA
Fit Quality
-7.07
FQ (Leeson)
HAC
37
heavy atoms
MW
504
Da
LogP
3.54
cLogP
Final rank
3.4153
rank score
Inter norm
-0.777
normalised
Contacts
20
H-bonds 2
Strain ΔE
42.0 kcal/mol
SASA buried
75%
Lipo contact
93% BSA apolar/total
SASA unbound
835 Ų
Apolar buried
580 Ų

Interaction summary

HBD 2 HY 9 PI 0 CLASH 4

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.
Name9IFFContacts13
PoseOpen native poseHB0
IFP residues
ALA209 ARG74 ASN208 GLY214 GLY215 GLY85 LEU73 LYS211 MET70 PHE83 PRO212 PRO213 VAL88
Current overlap11Native recall0.85
Jaccard0.50RMSD-
HB strict0Strict recall-
HB same residue+role0HB role recall-
HB same residue0HB residue recall-

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

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
190 3.4153154149302747 -0.777259 -25.5439 2 20 11 0.85 - - 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 -25.544kcal/mol
Ligand efficiency (LE) -0.6904kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -7.068
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 37HA

Physicochemical properties

Molecular weight 503.7Da
Lipinski: ≤ 500 Da
LogP (cLogP) 3.54
Lipinski: ≤ 5
Rotatable bonds 8

Conformational strain (MMFF94s)

Strain energy (ΔE) 42.03kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 77.75kcal/mol
Minimised FF energy 35.73kcal/mol

SASA & burial

✓ computed
SASA (unbound) 835.2Ų
Total solvent-accessible surface area of free ligand
BSA total 626.9Ų
Buried surface area upon binding
BSA apolar 580.3Ų
Hydrophobic contacts buried
BSA polar 46.5Ų
Polar contacts buried
Fraction buried 75.0%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 92.6%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3255.2Ų
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 1518.5Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)