FAIRMol

KB_chagas_34

Pose ID 4196 Compound 361 Pose 133

DB SELECTIONDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T07
T. brucei PTR1 T. brucei
Ligand KB_chagas_34
PDB6RX6

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
21.6 kcal/mol
Protein clashes
0
Internal clashes
12
Native overlap
contact recall 0.74, Jaccard 0.61, H-bond role recall 0.00
Burial
85%
Hydrophobic fit
92%
Reason: 12 internal clashes
12 intramolecular clashes
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.892 kcal/mol/HA) ✓ Good fit quality (FQ -8.77) ✓ Deep burial (85% SASA buried) ✓ Lipophilic contacts well-matched (92%) ✗ High strain energy (21.6 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (12)
Score
-28.545
kcal/mol
LE
-0.892
kcal/mol/HA
Fit Quality
-8.77
FQ (Leeson)
HAC
32
heavy atoms
MW
433
Da
LogP
2.82
cLogP
Strain ΔE
21.6 kcal/mol
SASA buried
85%
Lipo contact
92% BSA apolar/total
SASA unbound
698 Ų
Apolar buried
548 Ų

Interaction summary

HB 2 HY 24 PI 3 CLASH 0
Final rank0.346Score-28.545
Inter norm-0.983Intra norm0.091
Top1000noExcludedno
Contacts18H-bonds2
Artifact reasongeometry warning; 12 clashes; moderate strain Δ 21.6
Residues
ARG14 ASP161 CYS168 GLU217 GLY205 LEU208 LEU209 LYS220 MET169 MET213 NAP301 PHE171 PHE97 PRO210 TRP221 TYR174 VAL206 HIS267

Protein summary

275 residues
Protein targetT07Atoms3932
Residues275Chains3
Residue summaryLEU:437; VAL:433; ALA:361; ARG:288; ILE:266; GLU:210; LYS:198; SER:198; ASN:182; THR:154; GLN:153; PHE:140; PRO:140; TYR:126; GLY:112; HIS:103

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:NAP301

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
NameTbPTR1_cW_6RX6_ReadyContacts19
PoseOpen native poseHB0
IFP residues
ARG14 ASP161 CYS168 GLY205 LEU208 LEU209 LYS178 MET213 NAP301 PHE171 PHE97 PRO210 PRO99 SER207 SER95 TRP221 TYR174 TYR98 VAL206
Current overlap14Native recall0.74
Jaccard0.61RMSD-
HB strict0Strict recall0.00
HB same residue+role0HB role recall0.00
HB same residue1HB residue recall0.20

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
133 0.3461138562934019 -0.982697 -28.5447 2 18 14 0.74 0.00 - no Current
164 0.7410461600265953 -0.816792 -20.7917 1 17 0 0.00 0.00 - no Open
127 1.1617110201641345 -0.80525 -20.0936 1 17 0 0.00 0.00 - no Open
171 2.1316708086463296 -0.849187 -25.4797 2 18 0 0.00 0.00 - no Open
115 3.0781456025554954 -0.868961 -24.265 3 15 0 0.00 0.00 - no Open
173 3.547894738936712 -0.671206 -19.4104 4 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 -28.545kcal/mol
Ligand efficiency (LE) -0.8920kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -8.772
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 32HA

Physicochemical properties

Molecular weight 432.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 2.82
Lipinski: ≤ 5
Rotatable bonds 5

Conformational strain (MMFF94s)

Strain energy (ΔE) 21.61kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 63.83kcal/mol
Minimised FF energy 42.22kcal/mol

SASA & burial

✓ computed
SASA (unbound) 698.1Ų
Total solvent-accessible surface area of free ligand
BSA total 595.1Ų
Buried surface area upon binding
BSA apolar 548.1Ų
Hydrophobic contacts buried
BSA polar 46.9Ų
Polar contacts buried
Fraction buried 85.2%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 92.1%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -1768.6Ų
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 2051.9Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 930.4Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)