FAIRMol

KB_chagas_211

Pose ID 10301 Compound 4219 Pose 136

DB SELECTIONDocking 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_211
PDB6RB5

3D complex viewer

Strict H-bonds Permissive H-bonds
Viewer legend
Protein receptor
Pocket residues
Cofactor context
Docked ligand
Overall assessment
Reject SASA cached
Likely artefact or unreliable pose
Binding strong Geometry medium Native mixed SASA done
Strain ΔE
41.7 kcal/mol
Protein clashes
2
Internal clashes
2
Native overlap
contact recall 0.42, Jaccard 0.25
Burial
70%
Hydrophobic fit
84%
Reason: no major geometry red flags detected
2 protein-contact clashes
EcoTox / ADMET In-silico prediction only
Fish LC₅₀
Cat. 3 — Harmful (10–100 mg/L)
Daphnia EC₅₀
Cat. 3 — Harmful (10–100 mg/L)
Algae IC₅₀
Cat. 3 — Harmful (10–100 mg/L)
Bioaccum.
Not B (BCF≤2000)
Persistent
No
ADMET alerts (in-silico)
hERG Medium Ames Clear DILI Low
Molecular report
Full metrics ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Excellent LE (-0.647 kcal/mol/HA) ✓ Good fit quality (FQ -6.11) ✓ Good H-bonds (3 bonds) ✓ Deep burial (70% SASA buried) ✓ Lipophilic contacts well-matched (84%) ✗ Extreme strain energy (41.7 kcal/mol) ✗ Geometry warnings ✗ Internal clashes (9)
Score
-18.118
kcal/mol
LE
-0.647
kcal/mol/HA
Fit Quality
-6.11
FQ (Leeson)
HAC
28
heavy atoms
MW
376
Da
LogP
2.76
cLogP
Final rank
2.2474
rank score
Inter norm
-0.820
normalised
Contacts
13
H-bonds 3
Strain ΔE
41.7 kcal/mol
SASA buried
70%
Lipo contact
84% BSA apolar/total
SASA unbound
691 Ų
Apolar buried
407 Ų

Interaction summary

HBD 1 HBA 2 HY 5 PI 0 CLASH 2

HBD/HBA · H-bonds (geometric)

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

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 overlap5Native recall0.42
Jaccard0.25RMSD-
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
136 2.2473920581321205 -0.820406 -18.1177 3 13 5 0.42 - - no Current
181 3.823441721367558 -0.827186 -20.5194 5 15 0 0.00 - - no Open
125 4.626046724509404 -0.822911 -20.505 5 15 0 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 -18.118kcal/mol
Ligand efficiency (LE) -0.6471kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -6.108
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 28HA

Physicochemical properties

Molecular weight 375.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 2.76
Lipinski: ≤ 5
Rotatable bonds 3

Conformational strain (MMFF94s)

Strain energy (ΔE) 41.70kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 71.23kcal/mol
Minimised FF energy 29.53kcal/mol

SASA & burial

✓ computed
SASA (unbound) 690.7Ų
Total solvent-accessible surface area of free ligand
BSA total 484.8Ų
Buried surface area upon binding
BSA apolar 406.5Ų
Hydrophobic contacts buried
BSA polar 78.3Ų
Polar contacts buried
Fraction buried 70.2%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 83.9%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3211.2Ų
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 1466.2Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)