FAIRMol

KB_chagas_191

Pose ID 8987 Compound 2290 Pose 179

DB SELECTIONDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T14
T. brucei ODC (G418 binding site) T. brucei G418 binding site
Ligand KB_chagas_191
PDB1NJJ

3D complex viewer

Strict H-bonds Permissive H-bonds
Viewer legend
Protein receptor
Pocket residues
Cofactor context
Docked ligand
Overall assessment
Promising SASA cached
Promising and worth follow-up
Binding strong Geometry high Native mixed SASA done
Strain ΔE
16.2 kcal/mol
Protein clashes
1
Internal clashes
1
Native overlap
contact recall 0.53, Jaccard 0.40, H-bond role recall 0.40
Burial
70%
Hydrophobic fit
84%
Reason: no major geometry red flags detected
1 protein-contact clashes 47% of hydrophobic surface appears solvent-exposed (9/19 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
Molecular report
Full metrics ↗
Promising Reasonable quality metrics. Warrants further investigation.
✓ Excellent LE (-0.967 kcal/mol/HA) ✓ Good fit quality (FQ -9.02) ✓ Strong H-bond network (7 bonds) ✓ Deep burial (70% SASA buried) ✓ Lipophilic contacts well-matched (84%) ✗ Moderate strain (16.2 kcal/mol) ✗ Geometry warnings ✗ Internal clashes (9)
Score
-26.107
kcal/mol
LE
-0.967
kcal/mol/HA
Fit Quality
-9.02
FQ (Leeson)
HAC
27
heavy atoms
MW
387
Da
LogP
3.51
cLogP
Strain ΔE
16.2 kcal/mol
SASA buried
70%
Lipo contact
84% BSA apolar/total
SASA unbound
662 Ų
Apolar buried
389 Ų

Interaction summary

HB 7 HY 4 PI 0 CLASH 1 ⚠ Exposure 47%

HB · H-bonds

Mode: strict. Count shows atom-level H-bonds; unique residues in summary: 0.

PI · π–π interactions

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

HY · Hydrophobic contacts

CLASH · Clashes

⚠️Partial hydrophobic solvent exposure
47% of hydrophobic surface appears solvent-exposed (9/19 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
Non-polar atoms 19 Buried (contacted) 10 Exposed 9 LogP 3.51 H-bonds 7
Exposed fragments: phenyl (6/6 atoms exposed)aliphatic chain/group (3 atoms exposed)
Final rank3.342Score-26.107
Inter norm-0.974Intra norm0.007
Top1000noExcludedno
Contacts13H-bonds7
Artifact reasongeometry warning; 9 clashes; 2 protein clashes
Residues
ARG242 ARG337 ASP243 ASP385 GLU384 GLY240 LEU339 LYS51 PHE383 SER282 THR241 VAL335 VAL336

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
Name1NJJContacts15
PoseOpen native poseHB0
IFP residues
ARG22 ARG242 ARG337 ARG342 ASP243 ASP385 GLN341 GLU384 LEU25 LEU339 LEU382 PRO340 PRO344 SER282 THR241
Current overlap8Native recall0.53
Jaccard0.40RMSD-
HB strict1Strict recall0.17
HB same residue+role2HB role recall0.40
HB same residue2HB residue recall0.40

Protein summary

398 residues
Protein targetT14Atoms6140
Residues398Chains1
Residue summaryVAL:592; LEU:513; LYS:484; ARG:432; PHE:420; ILE:418; ASP:349; THR:322; TYR:315; PRO:308; GLU:301; ALA:290; SER:253; GLY:217; ASN:210; GLN:170

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:ORX602

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
84 0.8978347699667351 -0.856296 -18.6325 2 20 0 0.00 0.00 - no Open
148 1.357888497962855 -1.1807 -25.8924 5 19 0 0.00 0.00 - no Open
17 1.7243640298374872 -0.868266 -19.382 2 20 0 0.00 0.00 - no Open
83 1.7561042414858175 -0.860322 -19.3331 2 20 0 0.00 0.00 - no Open
172 2.1483737556840357 -0.787852 -18.4121 4 13 0 0.00 0.00 - no Open
179 3.3422147983594046 -0.973711 -26.1073 7 13 8 0.53 0.40 - no Current
123 3.34487200823826 -0.964684 -25.8709 8 13 8 0.53 0.40 - no Open
14 3.421092231944404 -0.988207 -26.0904 7 14 8 0.53 0.40 - no Open
68 3.5108182235106415 -0.943196 -24.5073 8 10 0 0.00 0.00 - no Open
126 3.999031944814804 -1.11537 -28.1146 6 14 0 0.00 0.00 - no Open
6 4.234950268980408 -0.850058 -20.7434 5 13 0 0.00 0.00 - no Open
162 51.82397871238766 -0.869886 -18.9182 2 20 0 0.00 0.00 - no Open
119 53.49803393991051 -0.976064 -25.9699 7 14 8 0.53 0.40 - 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 -26.107kcal/mol
Ligand efficiency (LE) -0.9669kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -9.021
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 27HA

Physicochemical properties

Molecular weight 387.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 3.51
Lipinski: ≤ 5
Rotatable bonds 6

Conformational strain (MMFF94s)

Strain energy (ΔE) 16.18kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 27.54kcal/mol
Minimised FF energy 11.36kcal/mol

SASA & burial

✓ computed
SASA (unbound) 662.4Ų
Total solvent-accessible surface area of free ligand
BSA total 466.0Ų
Buried surface area upon binding
BSA apolar 389.0Ų
Hydrophobic contacts buried
BSA polar 77.0Ų
Polar contacts buried
Fraction buried 70.4%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 83.5%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -2505.1Ų
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 3349.0Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1387.0Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)