FAIRMol

KB_chagas_118

Pose ID 13673 Compound 5455 Pose 115

DB fairmolDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T21
T. cruzi R5P T. cruzi
Ligand KB_chagas_118
PDB3K7O

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 medium Native strong SASA done
Strain ΔE
18.9 kcal/mol
Protein clashes
3
Internal clashes
3
Native overlap
contact recall 0.93, Jaccard 0.72, H-bond role recall 0.22
Burial
69%
Hydrophobic fit
89%
Reason: no major geometry red flags detected
3 protein-contact clashes 3 intramolecular clashes
EcoTox / ADMET In-silico prediction only
Fish LC₅₀
Cat. 2 — Toxic (1–10 mg/L)
Daphnia EC₅₀
Cat. 2 — Toxic (1–10 mg/L)
Algae IC₅₀
Cat. 2 — Toxic (1–10 mg/L)
Bioaccum.
Not B (BCF≤2000)
Persistent
No
ADMET alerts (in-silico)
hERG Medium Ames Clear DILI Risk
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.834 kcal/mol/HA) ✓ Good fit quality (FQ -8.04) ✓ Strong H-bond network (6 bonds) ✓ Deep burial (69% SASA buried) ✓ Lipophilic contacts well-matched (89%) ✗ Moderate strain (18.9 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (20)
Score
-25.008
kcal/mol
LE
-0.834
kcal/mol/HA
Fit Quality
-8.04
FQ (Leeson)
HAC
30
heavy atoms
MW
401
Da
LogP
4.53
cLogP
Final rank
4.6383
rank score
Inter norm
-0.838
normalised
Contacts
17
H-bonds 6
Strain ΔE
18.9 kcal/mol
SASA buried
69%
Lipo contact
89% BSA apolar/total
SASA unbound
688 Ų
Apolar buried
420 Ų

Interaction summary

HBA 6 HY 3 PI 1 CLASH 3

HBD/HBA · H-bonds (geometric)

HBD = ligand donates H · HBA = ligand accepts H · ~ = weak (≥110°). Mode: strict. Residues: 3.

PI · π–π interactions

Native π–π recall is disabled because no explicit native π–π reference was stored.

HY · Hydrophobic contacts

CLASH · Clashes

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
Name3K7OContacts14
PoseOpen native poseHB0
IFP residues
ARG137 ARG141 ASN103 HIS102 HIS138 ASP10 CYS69 GLY70 GLY74 HIS11 ILE73 PRO12 SER71 TYR46
Current overlap13Native recall0.93
Jaccard0.72RMSD-
HB strict3Strict recall0.25
HB same residue+role2HB role recall0.22
HB same residue2HB residue recall0.25

Protein summary

305 residues
Protein targetT21Atoms4646
Residues305Chains2
Residue summaryARG:576; ILE:532; VAL:512; GLU:420; ALA:360; PHE:240; HIS:238; LYS:220; THR:210; LEU:190; PRO:168; TYR:168; GLY:154; SER:154; ASP:144; ASN:112

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
115 4.638346468960765 -0.83811 -25.0082 6 17 13 0.93 0.22 - 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 -25.008kcal/mol
Ligand efficiency (LE) -0.8336kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -8.041
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 30HA

Physicochemical properties

Molecular weight 400.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 4.53
Lipinski: ≤ 5
Rotatable bonds 3

Conformational strain (MMFF94s)

Strain energy (ΔE) 18.86kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 126.65kcal/mol
Minimised FF energy 107.78kcal/mol

SASA & burial

✓ computed
SASA (unbound) 688.2Ų
Total solvent-accessible surface area of free ligand
BSA total 474.2Ų
Buried surface area upon binding
BSA apolar 420.5Ų
Hydrophobic contacts buried
BSA polar 53.7Ų
Polar contacts buried
Fraction buried 68.9%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 88.7%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -2343.5Ų
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 2482.0Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 773.0Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)