FAIRMol

OSA_Lib_217

Pose ID 9728 Compound 4419 Pose 242

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_217
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 medium Native strong SASA done
Strain ΔE
33.0 kcal/mol
Protein clashes
2
Internal clashes
2
Native overlap
contact recall 0.77, Jaccard 0.53
Burial
68%
Hydrophobic fit
96%
Reason: no major geometry red flags detected
2 protein-contact clashes 41% of hydrophobic surface appears solvent-exposed (14/34 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
EcoTox / ADMET In-silico prediction only
Fish LC₅₀
Cat. 2 — Toxic (1–10 mg/L)
Daphnia EC₅₀
Cat. 2 — Toxic (1–10 mg/L)
Algae IC₅₀
Cat. 2 — Toxic (1–10 mg/L)
Bioaccum.
Not B (BCF≤2000)
Persistent
No
ADMET alerts (in-silico)
hERG High Ames Clear DILI Risk
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.454 kcal/mol/HA) ✓ Good fit quality (FQ -4.71) ✓ Deep burial (68% SASA buried) ✓ Lipophilic contacts well-matched (96%) ✗ Very high strain energy (33.0 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (20)
Score
-17.717
kcal/mol
LE
-0.454
kcal/mol/HA
Fit Quality
-4.71
FQ (Leeson)
HAC
39
heavy atoms
MW
531
Da
LogP
4.11
cLogP
Final rank
3.1170
rank score
Inter norm
-0.613
normalised
Contacts
16
H-bonds 1
Strain ΔE
33.0 kcal/mol
SASA buried
68%
Lipo contact
96% BSA apolar/total
SASA unbound
876 Ų
Apolar buried
574 Ų

Interaction summary

HBA 1 HY 10 PI 0 CLASH 2

HBD/HBA · H-bonds (geometric)

HBD = ligand donates H · HBA = ligand accepts H · ~ = weak (≥110°). Mode: permissive. Residues: 1.

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: permissive.
Name9IFFContacts13
PoseOpen native poseHB0
IFP residues
ALA209 ARG74 ASN208 GLY214 GLY215 GLY85 LEU73 LYS211 MET70 PHE83 PRO212 PRO213 VAL88
Current overlap10Native recall0.77
Jaccard0.53RMSD-
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
242 3.1170149600599717 -0.613147 -17.7167 1 16 10 0.77 - - 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 -17.717kcal/mol
Ligand efficiency (LE) -0.4543kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -4.714
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 39HA

Physicochemical properties

Molecular weight 530.8Da
Lipinski: ≤ 500 Da
LogP (cLogP) 4.11
Lipinski: ≤ 5
Rotatable bonds 8

Conformational strain (MMFF94s)

Strain energy (ΔE) 33.02kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 138.17kcal/mol
Minimised FF energy 105.15kcal/mol

SASA & burial

✓ computed
SASA (unbound) 875.8Ų
Total solvent-accessible surface area of free ligand
BSA total 594.9Ų
Buried surface area upon binding
BSA apolar 574.0Ų
Hydrophobic contacts buried
BSA polar 20.9Ų
Polar contacts buried
Fraction buried 67.9%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 96.5%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3304.8Ų
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 1537.6Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)