FAIRMol

OSA_Lib_82

Pose ID 13686 Compound 1206 Pose 128

DB fairmolDocking pose analysis is being read from this database.
Compound detail Protein structures Back to compounds
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T21
T. cruzi R5P T. cruzi
Ligand OSA_Lib_82
PDB3K7O↗

3D complex viewer

Strict H-bonds Permissive H-bonds
Viewer legend
Protein receptor
Pocket residues
Cofactor context
Docked ligand
Overall assessment
Weak SASA cached
Promising but geometrically suspicious
Binding strong Geometry low Native strong SASA done
Strain ΔE
27.5 kcal/mol
Protein clashes
0
Internal clashes
16
Native overlap
contact recall 0.93, Jaccard 0.76, H-bond role recall 0.56
Burial
70%
Hydrophobic fit
89%
Reason: 16 internal clashes
16 intramolecular clashes 47% of hydrophobic surface appears solvent-exposed (15/32 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.761 kcal/mol/HA) ✓ Good fit quality (FQ -7.79) ✓ Good H-bonds (5 bonds) ✓ Deep burial (70% SASA buried) ✓ Lipophilic contacts well-matched (89%) ✗ High strain energy (27.5 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (16)
Score
-28.166
kcal/mol
LE
-0.761
kcal/mol/HA
Fit Quality
-7.79
FQ (Leeson)
HAC
37
heavy atoms
MW
505
Da
LogP
2.13
cLogP
Final rank
3.4883
rank score
Inter norm
-0.780
normalised
Contacts
16
H-bonds 6
Strain ΔE
27.5 kcal/mol
SASA buried
70%
Lipo contact
89% BSA apolar/total
SASA unbound
796 Ų
Apolar buried
498 Ų

Interaction summary

HBD 1 HBA 4 HY 3 PI 1 CLASH 0

HBD/HBA · H-bonds (geometric)
HBD = ligand donates H · HBA = ligand accepts H · ~ = weak (≥110°). Mode: permissive. Residues: 5.

PI · π–π interactions
Native π–π recall is disabled because no explicit native π–π reference was stored.

HY · Hydrophobic contacts

CLASH · Clashes
No clash · clashes detected for this pose.

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: permissive.
Name3K7OContacts14
PoseOpen native poseHB0
IFP residues
ARG137 ARG141 ASN103 HIS102 HIS138 ASP10 CYS69 GLY70 GLY74 HIS11 ILE73 PRO12 SER71 TYR46
Current overlap13Native recall0.93
Jaccard0.76RMSD-
HB strict5Strict recall0.42
HB same residue+role5HB role recall0.56
HB same residue5HB residue recall0.62

Protein summary

305 residues
Protein targetT21Atoms4646
Residues305Chains2
Residue summaryARG:576; ILE:532; VAL:512; GLU:420; ALA:360; PHE:240; HIS:238; LYS:220; THR:210; LEU:190; PRO:168; TYR:168; GLY:154; SER:154; ASP:144; ASN:112

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
190 1.887257124812883 -0.773302 -26.0308 3 18 0 0.00 0.00 - no Open
128 3.4882773096321715 -0.779999 -28.1657 6 16 13 0.93 0.56 - 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 -28.166kcal/mol
Ligand efficiency (LE) -0.7612kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -7.793
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 37HA

Physicochemical properties
Molecular weight 504.7Da
Lipinski: ≤ 500 Da
LogP (cLogP) 2.13
Lipinski: ≤ 5
Rotatable bonds 8

Conformational strain (MMFF94s)
Strain energy (ΔE) 27.47kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 96.01kcal/mol
Minimised FF energy 68.55kcal/mol

SASA & burial

✓ computed
SASA (unbound) 796.1Ų
Total solvent-accessible surface area of free ligand
BSA total 558.3Ų
Buried surface area upon binding
BSA apolar 497.9Ų
Hydrophobic contacts buried
BSA polar 60.4Ų
Polar contacts buried
Fraction buried 70.1%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 89.2%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -2449.4Ų
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 2482.0Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 768.4Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)