FAIRMol

KB_chagas_66

Pose ID 9623 Compound 4028 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
T15
T. brucei TR (Dimer cleft site) T. brucei Dimer cleft site
Ligand KB_chagas_66
PDB9IFF

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
29.3 kcal/mol
Protein clashes
2
Internal clashes
2
Native overlap
contact recall 0.85, Jaccard 0.58
Burial
78%
Hydrophobic fit
83%
Reason: no major geometry red flags detected
2 protein-contact clashes
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.795 kcal/mol/HA) ✓ Good fit quality (FQ -7.82) ✓ Deep burial (78% SASA buried) ✓ Lipophilic contacts well-matched (83%) ✗ High strain energy (29.3 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (14)
Score
-25.449
kcal/mol
LE
-0.795
kcal/mol/HA
Fit Quality
-7.82
FQ (Leeson)
HAC
32
heavy atoms
MW
459
Da
LogP
3.20
cLogP
Final rank
3.6194
rank score
Inter norm
-0.786
normalised
Contacts
17
H-bonds 4
Strain ΔE
29.3 kcal/mol
SASA buried
78%
Lipo contact
83% BSA apolar/total
SASA unbound
727 Ų
Apolar buried
468 Ų

Interaction summary

HBD 1 HBA 1 HY 9 PI 2 CLASH 2

HBD/HBA · H-bonds (geometric)

HBD = ligand donates H · HBA = ligand accepts H · ~ = weak (≥110°). Mode: strict. Residues: 2.

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.
Name9IFFContacts13
PoseOpen native poseHB0
IFP residues
ALA209 ARG74 ASN208 GLY214 GLY215 GLY85 LEU73 LYS211 MET70 PHE83 PRO212 PRO213 VAL88
Current overlap11Native recall0.85
Jaccard0.58RMSD-
HB strict0Strict recall-
HB same residue+role0HB role recall-
HB same residue0HB residue recall-

Protein summary

489 residues
Protein targetT15Atoms7420
Residues489Chains1
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:264; MET:204

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
137 3.6194251691893866 -0.785901 -25.4487 4 17 11 0.85 - - no Current
105 3.743349399493038 -0.924724 -25.3467 6 18 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 -25.449kcal/mol
Ligand efficiency (LE) -0.7953kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -7.821
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 32HA

Physicochemical properties

Molecular weight 458.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 3.20
Lipinski: ≤ 5
Rotatable bonds 7

Conformational strain (MMFF94s)

Strain energy (ΔE) 29.27kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 98.15kcal/mol
Minimised FF energy 68.89kcal/mol

SASA & burial

✓ computed
SASA (unbound) 727.5Ų
Total solvent-accessible surface area of free ligand
BSA total 565.4Ų
Buried surface area upon binding
BSA apolar 467.6Ų
Hydrophobic contacts buried
BSA polar 97.8Ų
Polar contacts buried
Fraction buried 77.7%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 82.7%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3060.1Ų
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 4005.2Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1567.6Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)