FAIRMol

KB_chagas_132

Pose ID 11682 Compound 108 Pose 161

DB SELECTIONDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T18
T. brucei TR (Mepacrine binding site (MBS, site 1)) T. brucei Mepacrine binding site (MBS, site 1)
Ligand KB_chagas_132
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
Promising but geometrically suspicious
Binding strong Geometry low Native strong SASA done
Strain ΔE
23.8 kcal/mol
Protein clashes
0
Internal clashes
16
Native overlap
contact recall 0.77, Jaccard 0.59
Burial
68%
Hydrophobic fit
72%
Reason: 16 internal clashes
16 intramolecular clashes
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.690 kcal/mol/HA) ✓ Good fit quality (FQ -6.90) ✓ Good H-bonds (3 bonds) ✓ Deep burial (68% SASA buried) ✓ Lipophilic contacts well-matched (72%) ✗ High strain energy (23.8 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (16)
Score
-23.453
kcal/mol
LE
-0.690
kcal/mol/HA
Fit Quality
-6.90
FQ (Leeson)
HAC
34
heavy atoms
MW
476
Da
LogP
2.21
cLogP
Strain ΔE
23.8 kcal/mol
SASA buried
68%
Lipo contact
72% BSA apolar/total
SASA unbound
762 Ų
Apolar buried
371 Ų

Interaction summary

HB 3 HY 24 PI 2 CLASH 0

HB · H-bonds

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

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.
Final rank2.662Score-23.453
Inter norm-0.752Intra norm0.062
Top1000noExcludedno
Contacts14H-bonds3
Artifact reasongeometry warning; 16 clashes; 1 protein clash; moderate strain Δ 23.8
Residues
ASP116 GLU18 GLY112 GLY13 GLY49 ILE339 LEU17 MET113 SER109 SER14 THR335 TRP21 TYR110 VAL53

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
Name6RB5Contacts13
PoseOpen native poseHB0
IFP residues
ASP116 GLU18 GLY112 ILE106 LEU17 MET113 SER109 THR117 THR335 TRP21 TYR110 VAL53 VAL58
Current overlap10Native recall0.77
Jaccard0.59RMSD-
HB strict0Strict recall-
HB same residue+role0HB role recall-
HB same residue0HB residue recall-

Protein summary

493 residues
Protein targetT18Atoms7550
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
116 0.9967124239667426 -0.835107 -24.9422 1 19 0 0.00 - - no Open
145 1.3995751921199313 -0.88415 -27.5642 3 16 0 0.00 - - no Open
182 1.4861130235883124 -0.855269 -26.7745 4 22 0 0.00 - - no Open
140 1.615020829250697 -0.925503 -28.3157 6 17 0 0.00 - - no Open
161 2.662027008092362 -0.751934 -23.4535 3 14 10 0.77 - - no Current
149 3.0092960382301914 -0.757482 -21.0618 2 22 0 0.00 - - no Open
117 3.133913752613804 -0.893126 -27.6382 10 20 0 0.00 - - no Open
92 3.1897154297188073 -0.7343 -24.0617 7 15 10 0.77 - - no Open
109 3.266242765469782 -0.81009 -22.6151 5 16 0 0.00 - - no Open
95 3.6098926606982675 -0.795677 -23.8078 8 16 0 0.00 - - no Open
150 3.6690791561020983 -0.768661 -24.4817 6 18 0 0.00 - - no Open
91 3.8086261390469938 -0.740979 -20.0503 5 21 0 0.00 - - no Open
124 4.692634237226219 -0.64544 -22.9491 7 15 0 0.00 - - no Open
103 4.725842136853786 -0.76159 -22.4824 5 18 0 0.00 - - no Open
118 4.790784883872673 -0.731769 -21.8142 8 17 0 0.00 - - no Open
73 4.7962875837914805 -1.009 -30.2636 11 20 0 0.00 - - no Open
46 5.044122438992116 -0.80531 -23.3978 7 15 0 0.00 - - no Open
87 5.0598912182116695 -0.712441 -22.3133 4 21 0 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 -23.453kcal/mol
Ligand efficiency (LE) -0.6898kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -6.902
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 34HA

Physicochemical properties

Molecular weight 475.6Da
Lipinski: ≤ 500 Da
LogP (cLogP) 2.21
Lipinski: ≤ 5
Rotatable bonds 6

Conformational strain (MMFF94s)

Strain energy (ΔE) 23.81kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 53.59kcal/mol
Minimised FF energy 29.78kcal/mol

SASA & burial

✓ computed
SASA (unbound) 761.8Ų
Total solvent-accessible surface area of free ligand
BSA total 515.4Ų
Buried surface area upon binding
BSA apolar 371.4Ų
Hydrophobic contacts buried
BSA polar 144.0Ų
Polar contacts buried
Fraction buried 67.6%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 72.1%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3184.1Ų
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 1485.5Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)