FAIRMol

KB_chagas_124

Pose ID 12327 Compound 1798 Pose 126

DB SELECTIONDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T19
T. brucei TR (NADPH binding site) T. brucei NADPH binding site
Ligand KB_chagas_124
PDB2WOV

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 mixed SASA done
Strain ΔE
23.1 kcal/mol
Protein clashes
1
Internal clashes
1
Native overlap
contact recall 0.26, Jaccard 0.25, H-bond role recall 0.20
Burial
74%
Hydrophobic fit
60%
Reason: no major geometry red flags detected
1 protein-contact clashes 50% of hydrophobic surface appears solvent-exposed (5/10 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 (-1.509 kcal/mol/HA) ✓ Good fit quality (FQ -12.37) ✓ Strong H-bond network (12 bonds) ✓ Deep burial (74% SASA buried) ✓ Lipophilic contacts well-matched (60%) ✗ High strain energy (23.1 kcal/mol) ✗ Geometry warnings ✗ Minor protein-contact clashes (3)
Score
-28.670
kcal/mol
LE
-1.509
kcal/mol/HA
Fit Quality
-12.37
FQ (Leeson)
HAC
19
heavy atoms
MW
268
Da
LogP
-2.20
cLogP
Strain ΔE
23.1 kcal/mol
SASA buried
74%
Lipo contact
60% BSA apolar/total
SASA unbound
448 Ų
Apolar buried
202 Ų

Interaction summary

HB 12 HY 4 PI 0 CLASH 1 ⚠ Exposure 50%
⚠️Partial hydrophobic solvent exposure
50% of hydrophobic surface appears solvent-exposed (5/10 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
Non-polar atoms 10 Buried (contacted) 5 Exposed 5 LogP -2.2 H-bonds 12
Exposed fragments: aromatic ring (3/5 atoms exposed)aromatic ring (4/6 atoms exposed)
Final rank-0.588Score-28.670
Inter norm-1.637Intra norm0.128
Top1000noExcludedno
Contacts8H-bonds12
Artifact reasongeometry warning; 3 clashes; 3 protein contact clashes; 3 severe cofactor-context clashes; moderate strain Δ 23.1
Residues
ARG222 ARG228 GLY197 LEU227 NDP800 PHE198 PHE230 TYR221

Protein summary

493 residues
Protein targetT19Atoms7541
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:330; TYR:294; ASP:264; 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
C:NDP800

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
Name2WOVContacts27
PoseOpen native poseHB0
IFP residues
ALA284 ALA365 ARG222 ARG228 ARG287 ASN223 ASN254 GLN165 GLU202 GLY195 GLY196 GLY197 GLY286 ILE199 ILE285 LEU227 LEU334 LYS60 MET333 NDP800 PHE198 PHE367 PRO167 SER200 TYR221 VAL194 VAL366
Current overlap7Native recall0.26
Jaccard0.25RMSD-
HB strict1Strict recall0.08
HB same residue+role1HB role recall0.20
HB same residue1HB residue recall0.25

HB · H-bonds

Mode: strict. Count shows atom-level H-bonds; unique residues in summary: 0.

PI · π–π interactions

No pi · π–π interactions detected for this pose.

HY · Hydrophobic contacts

CLASH · Clashes

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
126 -0.5879377610528022 -1.63674 -28.6704 12 8 7 0.26 0.20 - no Current
120 0.9041903580328218 -1.78179 -33.7757 8 10 0 0.00 0.00 - no Open
84 1.3951132055642954 -1.31974 -22.3982 7 10 0 0.00 0.00 - no Open
183 1.6114407945426672 -0.996377 -18.1312 7 12 0 0.00 0.00 - no Open
116 1.8405702221899884 -1.63635 -29.0274 16 14 0 0.00 0.00 - no Open
117 3.98837453237915 -1.40899 -25.9622 10 12 0 0.00 0.00 - no Open

Molecular metrics

RDKit SASA burial, strain energy (MMFF94s), ligand efficiency and fit quality for this docking pose.
✓ Metrics available

Scoring & efficiency

Docking score -28.670kcal/mol
Ligand efficiency (LE) -1.5090kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -12.369
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 19HA

Physicochemical properties

Molecular weight 268.2Da
Lipinski: ≤ 500 Da
LogP (cLogP) -2.20
Lipinski: ≤ 5
Rotatable bonds 5

Conformational strain (MMFF94s)

Strain energy (ΔE) 23.11kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 55.72kcal/mol
Minimised FF energy 32.60kcal/mol

SASA & burial

✓ computed
SASA (unbound) 448.0Ų
Total solvent-accessible surface area of free ligand
BSA total 333.4Ų
Buried surface area upon binding
BSA apolar 201.7Ų
Hydrophobic contacts buried
BSA polar 131.7Ų
Polar contacts buried
Fraction buried 74.4%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 60.5%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -2809.3Ų
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 4064.7Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1510.5Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)