FAIRMol

KB_Leish_39

Pose ID 8962 Compound 554 Pose 154

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_Leish_39
PDB1NJJ

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 medium Native mixed SASA done
Strain ΔE
34.4 kcal/mol
Protein clashes
3
Internal clashes
3
Native overlap
contact recall 0.47, Jaccard 0.37, H-bond role recall 0.40
Burial
61%
Hydrophobic fit
88%
Reason: no major geometry red flags detected
3 protein-contact clashes 3 intramolecular clashes 100% of hydrophobic surface is solvent-exposed (28/28 atoms). Large non-polar area without protein contacts incurs a desolvation penalty and will reduce binding affinity. Consider truncating or replacing the exposed fragment.
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.604 kcal/mol/HA) ✓ Good fit quality (FQ -6.18) ✓ Strong H-bond network (9 bonds) ✓ Good burial (61% SASA buried) ✓ Lipophilic contacts well-matched (88%) ✗ Very high strain energy (34.4 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (20)
Score
-22.353
kcal/mol
LE
-0.604
kcal/mol/HA
Fit Quality
-6.18
FQ (Leeson)
HAC
37
heavy atoms
MW
498
Da
LogP
2.19
cLogP
Strain ΔE
34.4 kcal/mol
SASA buried
61%
Lipo contact
88% BSA apolar/total
SASA unbound
826 Ų
Apolar buried
442 Ų

Interaction summary

HB 9 HY 0 PI 0 CLASH 3 ⚠ Exposure 100%

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

No hy · hydrophobic contacts detected for this pose.

CLASH · Clashes

🚨Solvent-exposed hydrophobic surface — desolvation penalty likely
100% of hydrophobic surface is solvent-exposed (28/28 atoms). Large non-polar area without protein contacts incurs a desolvation penalty and will reduce binding affinity. Consider truncating or replacing the exposed fragment.
Non-polar atoms 28 Buried (contacted) 0 Exposed 28 LogP 2.19 H-bonds 9
Exposed fragments: phenyl (3/5 atoms exposed)phenyl (6/6 atoms exposed)phenyl (4/6 atoms exposed)phenyl (4/6 atoms exposed)phenyl (6/6 atoms exposed)phenyl (5/6 atoms exposed)aliphatic chain/group (4 atoms exposed)
Final rank4.267Score-22.353
Inter norm-0.656Intra norm0.052
Top1000noExcludedno
Contacts11H-bonds9
Artifact reasongeometry warning; 20 clashes; 2 protein clashes; high strain Δ 34.4
Residues
ARG22 ARG242 ASP243 ASP385 GLU384 GLY240 LYS51 SER282 THR21 THR241 THR285

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 overlap7Native recall0.47
Jaccard0.37RMSD-
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
138 2.2200071524537455 -0.72598 -26.0638 3 17 0 0.00 0.00 - no Open
154 3.2345112089005923 -0.801538 -28.9843 5 21 0 0.00 0.00 - no Open
116 3.357421775228675 -0.666954 -23.6678 2 16 0 0.00 0.00 - no Open
150 3.765454442357164 -0.548404 -19.8855 6 10 0 0.00 0.00 - no Open
154 4.2674717542737 -0.656274 -22.3533 9 11 7 0.47 0.40 - 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 -22.353kcal/mol
Ligand efficiency (LE) -0.6041kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -6.185
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 37HA

Physicochemical properties

Molecular weight 497.6Da
Lipinski: ≤ 500 Da
LogP (cLogP) 2.19
Lipinski: ≤ 5
Rotatable bonds 6

Conformational strain (MMFF94s)

Strain energy (ΔE) 34.40kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 20.75kcal/mol
Minimised FF energy -13.65kcal/mol

SASA & burial

✓ computed
SASA (unbound) 825.7Ų
Total solvent-accessible surface area of free ligand
BSA total 500.3Ų
Buried surface area upon binding
BSA apolar 442.0Ų
Hydrophobic contacts buried
BSA polar 58.3Ų
Polar contacts buried
Fraction buried 60.6%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 88.3%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -2674.5Ų
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 1417.0Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)