FAIRMol

KB_HAT_18

Pose ID 12281 Compound 1682 Pose 80

DB SELECTIONDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T19
T. brucei TR (NADPH binding site) T. brucei NADPH binding site
Ligand KB_HAT_18
PDB2WOV

3D complex viewer

Strict H-bonds Permissive H-bonds
Viewer legend
Protein receptor
Pocket residues
Cofactor context
Docked ligand
Overall assessment
Weak SASA cached
Promising but geometrically suspicious
Binding strong Geometry low Native mixed SASA done
Strain ΔE
15.4 kcal/mol
Protein clashes
6
Internal clashes
7
Native overlap
contact recall 0.26, Jaccard 0.17, H-bond role recall 0.00
Burial
97%
Hydrophobic fit
84%
Reason: 7 internal clashes
6 protein-contact clashes 7 intramolecular clashes 35% of hydrophobic surface appears solvent-exposed (6/17 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-1.357 kcal/mol/HA) ✓ Good fit quality (FQ -12.51) ✓ Strong H-bond network (10 bonds) ✓ Deep burial (97% SASA buried) ✓ Lipophilic contacts well-matched (84%) ✗ Moderate strain (15.4 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (10)
Score
-35.295
kcal/mol
LE
-1.357
kcal/mol/HA
Fit Quality
-12.51
FQ (Leeson)
HAC
26
heavy atoms
MW
377
Da
LogP
2.13
cLogP
Strain ΔE
15.4 kcal/mol
SASA buried
97%
Lipo contact
84% BSA apolar/total
SASA unbound
598 Ų
Apolar buried
485 Ų

Interaction summary

HB 10 HY 12 PI 0 CLASH 7 ⚠ Exposure 35%
⚠️Partial hydrophobic solvent exposure
35% of hydrophobic surface appears solvent-exposed (6/17 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
Non-polar atoms 17 Buried (contacted) 11 Exposed 6 LogP 2.13 H-bonds 10
Exposed fragments: pyrrolyl (6/6 atoms exposed)
Final rank4.826Score-35.295
Inter norm-1.289Intra norm-0.089
Top1000noExcludedno
Contacts21H-bonds10
Artifact reasongeometry warning; 10 clashes; 3 protein clashes; 1 cofactor-context clash
Residues
ARG287 ASP327 CYS52 CYS57 GLU202 GLY161 GLY56 ILE199 LEU334 LYS60 MET333 NDP800 PHE182 PHE203 PRO336 SER14 SER162 SER178 THR335 THR51 VAL55

Protein summary

493 residues
Protein targetT19Atoms7541
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:330; TYR:294; ASP:264; 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
C:NDP800

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
Name2WOVContacts27
PoseOpen native poseHB0
IFP residues
ALA284 ALA365 ARG222 ARG228 ARG287 ASN223 ASN254 GLN165 GLU202 GLY195 GLY196 GLY197 GLY286 ILE199 ILE285 LEU227 LEU334 LYS60 MET333 NDP800 PHE198 PHE367 PRO167 SER200 TYR221 VAL194 VAL366
Current overlap7Native recall0.26
Jaccard0.17RMSD-
HB strict0Strict recall0.00
HB same residue+role0HB role recall0.00
HB same residue0HB residue recall0.00

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

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
55 0.5243665770310006 -0.920154 -21.7702 5 13 0 0.00 0.00 - no Open
93 1.53189922327258 -0.953717 -25.0514 6 11 0 0.00 0.00 - no Open
90 3.2728827443071546 -0.991054 -25.8828 8 15 0 0.00 0.00 - no Open
80 4.82559950042143 -1.28946 -35.2953 10 21 7 0.26 0.00 - 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 -35.295kcal/mol
Ligand efficiency (LE) -1.3575kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -12.507
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 26HA

Physicochemical properties

Molecular weight 376.9Da
Lipinski: ≤ 500 Da
LogP (cLogP) 2.13
Lipinski: ≤ 5
Rotatable bonds 5

Conformational strain (MMFF94s)

Strain energy (ΔE) 15.42kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy -93.92kcal/mol
Minimised FF energy -109.34kcal/mol

SASA & burial

✓ computed
SASA (unbound) 598.0Ų
Total solvent-accessible surface area of free ligand
BSA total 580.7Ų
Buried surface area upon binding
BSA apolar 485.2Ų
Hydrophobic contacts buried
BSA polar 95.5Ų
Polar contacts buried
Fraction buried 97.1%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 83.6%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3101.6Ų
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 4064.7Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1465.5Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)