FAIRMol

KB_chagas_26

Pose ID 7557 Compound 3948 Pose 105

DB SELECTIONDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T12
T. brucei R5P T. brucei
Ligand KB_chagas_26
PDB6FXS

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 strong SASA done
Strain ΔE
23.3 kcal/mol
Protein clashes
1
Internal clashes
1
Native overlap
contact recall 1.00, Jaccard 0.84, H-bond role recall 0.50
Burial
82%
Hydrophobic fit
74%
Reason: no major geometry red flags detected
1 protein-contact clashes
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-1.009 kcal/mol/HA) ✓ Good fit quality (FQ -9.41) ✓ Strong H-bond network (11 bonds) ✓ Deep burial (82% SASA buried) ✓ Lipophilic contacts well-matched (74%) ✗ High strain energy (23.3 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (14)
Score
-27.242
kcal/mol
LE
-1.009
kcal/mol/HA
Fit Quality
-9.41
FQ (Leeson)
HAC
27
heavy atoms
MW
403
Da
LogP
4.20
cLogP
Strain ΔE
23.3 kcal/mol
SASA buried
82%
Lipo contact
74% BSA apolar/total
SASA unbound
622 Ų
Apolar buried
374 Ų

Interaction summary

HB 11 HY 9 PI 3 CLASH 1
Final rank4.697Score-27.242
Inter norm-1.060Intra norm0.051
Top1000noExcludedno
Contacts19H-bonds11
Artifact reasongeometry warning; 14 clashes; 3 protein clashes; moderate strain Δ 23.3
Residues
ARG140 ARG144 ASN106 HIS105 HIS141 MET101 TYR97 ARG116 ARG46 ASP13 CYS72 GLY73 GLY75 GLY77 HIS14 ILE15 ILE76 SER74 TYR49

Protein summary

302 residues
Protein targetT12Atoms4598
Residues302Chains2
Residue summaryARG:576; ILE:456; VAL:448; GLU:360; ALA:340; LEU:304; TYR:252; HIS:204; PRO:196; THR:196; GLY:182; LYS:176; ASP:168; PHE:160; MET:153; SER:121

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:CSD72

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
Name6FXSContacts16
PoseOpen native poseHB0
IFP residues
ARG140 ARG144 ASN106 HIS105 HIS141 ARG46 ASP13 CYS72 GLY73 GLY75 GLY77 HIS14 ILE15 ILE76 SER74 TYR49
Current overlap16Native recall1.00
Jaccard0.84RMSD-
HB strict6Strict recall0.50
HB same residue+role5HB role recall0.50
HB same residue7HB residue recall0.70

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

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
122 2.7870905736747185 -1.32575 -34.6324 8 19 0 0.00 0.00 - no Open
105 4.697445739151393 -1.05988 -27.2417 11 19 16 1.00 0.50 - 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 -27.242kcal/mol
Ligand efficiency (LE) -1.0090kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -9.413
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 27HA

Physicochemical properties

Molecular weight 402.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 4.20
Lipinski: ≤ 5
Rotatable bonds 5

Conformational strain (MMFF94s)

Strain energy (ΔE) 23.31kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 1.92kcal/mol
Minimised FF energy -21.39kcal/mol

SASA & burial

✓ computed
SASA (unbound) 621.6Ų
Total solvent-accessible surface area of free ligand
BSA total 508.6Ų
Buried surface area upon binding
BSA apolar 374.1Ų
Hydrophobic contacts buried
BSA polar 134.6Ų
Polar contacts buried
Fraction buried 81.8%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 73.5%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -2139.1Ų
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 2454.8Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 776.2Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)