FAIRMol

KB_chagas_217

Pose ID 10302 Compound 3716 Pose 137

DB fairmolDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T16
T. brucei TR (Dimer interface (site 2)) T. brucei Dimer interface (site 2)
Ligand KB_chagas_217
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
Weak or marginal quality
Binding strong Geometry high Native strong SASA done
Strain ΔE
14.4 kcal/mol
Protein clashes
2
Internal clashes
2
Native overlap
contact recall 0.92, Jaccard 0.65
Burial
76%
Hydrophobic fit
88%
Reason: no major geometry red flags detected
2 protein-contact clashes
EcoTox / ADMET In-silico prediction only
Fish LC₅₀
Not classified (>100 mg/L)
Daphnia EC₅₀
Not classified (>100 mg/L)
Algae IC₅₀
Not classified (>100 mg/L)
Bioaccum.
Not B (BCF≤2000)
Persistent
No
ADMET alerts (in-silico)
hERG Low Ames Clear DILI Low
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.973 kcal/mol/HA) ✓ Good fit quality (FQ -8.59) ✓ Good H-bonds (5 bonds) ✓ Deep burial (76% SASA buried) ✓ Lipophilic contacts well-matched (88%) ✗ Moderate strain (14.4 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (12)
Score
-22.374
kcal/mol
LE
-0.973
kcal/mol/HA
Fit Quality
-8.59
FQ (Leeson)
HAC
23
heavy atoms
MW
309
Da
LogP
1.57
cLogP
Final rank
4.4700
rank score
Inter norm
-0.996
normalised
Contacts
16
H-bonds 6
Strain ΔE
14.4 kcal/mol
SASA buried
76%
Lipo contact
88% BSA apolar/total
SASA unbound
570 Ų
Apolar buried
386 Ų

Interaction summary

HBD 4 HBA 1 HY 6 PI 0 CLASH 2

HBD/HBA · H-bonds (geometric)

HBD = ligand donates H · HBA = ligand accepts H · ~ = weak (≥110°). Mode: strict. Residues: 4.

PI · π–π interactions

No pi · π–π interactions detected for this pose.

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.
Name6RB5Contacts12
PoseOpen native poseHB0
IFP residues
ALA90 ARG74 GLY85 LEU73 LYS89 MET70 PHE83 PRO212 PRO213 SER86 SER87 VAL88
Current overlap11Native recall0.92
Jaccard0.65RMSD-
HB strict0Strict recall-
HB same residue+role0HB role recall-
HB same residue0HB residue recall-

Protein summary

493 residues
Protein targetT16Atoms7551
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
190 1.92180459980088 -0.861592 -19.2982 5 11 0 0.00 - - no Open
151 2.63884878854898 -1.04653 -20.7791 6 16 0 0.00 - - no Open
137 4.47002663616061 -0.995709 -22.3742 6 16 11 0.92 - - 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 -22.374kcal/mol
Ligand efficiency (LE) -0.9728kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -8.586
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 23HA

Physicochemical properties

Molecular weight 309.4Da
Lipinski: ≤ 500 Da
LogP (cLogP) 1.57
Lipinski: ≤ 5
Rotatable bonds 5

Conformational strain (MMFF94s)

Strain energy (ΔE) 14.42kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy -104.88kcal/mol
Minimised FF energy -119.30kcal/mol

SASA & burial

✓ computed
SASA (unbound) 570.4Ų
Total solvent-accessible surface area of free ligand
BSA total 435.7Ų
Buried surface area upon binding
BSA apolar 385.6Ų
Hydrophobic contacts buried
BSA polar 50.1Ų
Polar contacts buried
Fraction buried 76.4%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 88.5%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3116.6Ų
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 4076.6Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1468.2Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)