FAIRMol

KB_chagas_131

Pose ID 10992 Compound 445 Pose 149

DB fairmolDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T17
T. brucei TR (Doorstop site) T. brucei Doorstop site
Ligand KB_chagas_131
PDB5S9T

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
28.6 kcal/mol
Protein clashes
0
Internal clashes
16
Native overlap
contact recall 0.75, Jaccard 0.35, H-bond role recall 0.00
Burial
80%
Hydrophobic fit
76%
Reason: 16 internal clashes
16 intramolecular clashes
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.481 kcal/mol/HA) ✓ Good fit quality (FQ -4.96) ✓ Good H-bonds (4 bonds) ✓ Deep burial (80% SASA buried) ✓ Lipophilic contacts well-matched (76%) ✗ High strain energy (28.6 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (16)
Score
-18.279
kcal/mol
LE
-0.481
kcal/mol/HA
Fit Quality
-4.96
FQ (Leeson)
HAC
38
heavy atoms
MW
547
Da
LogP
5.73
cLogP
Strain ΔE
28.6 kcal/mol
SASA buried
80%
Lipo contact
76% BSA apolar/total
SASA unbound
831 Ų
Apolar buried
504 Ų

Interaction summary

HB 4 HY 24 PI 2 CLASH 0
Final rank2.999Score-18.279
Inter norm-0.595Intra norm0.114
Top1000noExcludedno
Contacts23H-bonds4
Artifact reasongeometry warning; 16 clashes; 1 protein clash; moderate strain Δ 28.6
Residues
ALA363 ARG228 ARG287 ARG361 CYS375 GLY197 GLY229 GLY376 HIS428 ILE199 ILE378 LEU227 LEU332 LEU334 LEU377 MET333 PHE198 PHE230 SER364 THR360 THR374 VAL362 VAL381

Protein summary

1033 residues
Protein targetT17Atoms15160
Residues1033Chains2
Residue summaryVAL:1536; LEU:1387; LYS:1386; ILE:1064; GLU:900; THR:868; ARG:816; PHE:800; ALA:780; ASN:700; PRO:686; GLY:672; SER:616; TYR:588; ASP:528; MET:408

Receptor context

2 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 2 Excluded HETATM 0
Kept cofactors / ions
A:FAD501 B:FAD501

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
Name5S9TContacts12
PoseOpen native poseHB0
IFP residues
ALA365 ARG228 ARG331 GLY229 LEU332 LEU334 MET333 PHE198 PHE230 SER364 THR374 VAL366
Current overlap9Native recall0.75
Jaccard0.35RMSD-
HB strict0Strict recall0.00
HB same residue+role0HB role recall0.00
HB same residue0HB residue recall0.00

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.

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
160 2.145707056960428 -0.541334 -18.9128 1 13 0 0.00 0.00 - no Open
181 2.5828649242251576 -0.722597 -23.3111 2 16 0 0.00 0.00 - no Open
139 2.9684544083836917 -0.676871 -25.281 2 15 0 0.00 0.00 - no Open
149 2.9985772925881706 -0.595212 -18.2787 4 23 9 0.75 0.00 - no Current
164 3.1705736298131115 -0.767192 -26.1581 5 17 0 0.00 0.00 - no Open
130 3.3331309706282446 -0.660805 -24.4108 3 12 0 0.00 0.00 - no Open
143 3.555731098989027 -0.647167 -22.6952 3 14 0 0.00 0.00 - no Open
184 3.576987097282838 -0.584592 -15.0814 6 13 0 0.00 0.00 - no Open
175 4.5450748195206625 -0.597835 -18.5069 5 14 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 -18.279kcal/mol
Ligand efficiency (LE) -0.4810kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -4.959
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 38HA

Physicochemical properties

Molecular weight 546.7Da
Lipinski: ≤ 500 Da
LogP (cLogP) 5.73
Lipinski: ≤ 5
Rotatable bonds 6

Conformational strain (MMFF94s)

Strain energy (ΔE) 28.63kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy -11.08kcal/mol
Minimised FF energy -39.71kcal/mol

SASA & burial

✓ computed
SASA (unbound) 831.4Ų
Total solvent-accessible surface area of free ligand
BSA total 666.4Ų
Buried surface area upon binding
BSA apolar 504.2Ų
Hydrophobic contacts buried
BSA polar 162.2Ų
Polar contacts buried
Fraction buried 80.2%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 75.7%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -6633.8Ų
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 8063.1Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 2078.9Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)