FAIRMol

OSA_Lib_301

Pose ID 8994 Compound 4137 Pose 186

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 OSA_Lib_301
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 high Native mixed SASA done
Strain ΔE
17.0 kcal/mol
Protein clashes
1
Internal clashes
1
Native overlap
contact recall 0.53, Jaccard 0.47, H-bond role recall 0.20
Burial
64%
Hydrophobic fit
97%
Reason: no major geometry red flags detected
1 protein-contact clashes 79% of hydrophobic surface is solvent-exposed (22/28 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 (-0.769 kcal/mol/HA) ✓ Good fit quality (FQ -7.49) ✓ Good H-bonds (3 bonds) ✓ Good burial (64% SASA buried) ✓ Lipophilic contacts well-matched (97%) ✗ Moderate strain (17.0 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (13)
Score
-23.843
kcal/mol
LE
-0.769
kcal/mol/HA
Fit Quality
-7.49
FQ (Leeson)
HAC
31
heavy atoms
MW
413
Da
LogP
3.99
cLogP
Strain ΔE
17.0 kcal/mol
SASA buried
64%
Lipo contact
97% BSA apolar/total
SASA unbound
697 Ų
Apolar buried
432 Ų

Interaction summary

HB 3 HY 2 PI 0 CLASH 1 ⚠ Exposure 78%
🚨Solvent-exposed hydrophobic surface — desolvation penalty likely
79% of hydrophobic surface is solvent-exposed (22/28 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) 6 Exposed 22 LogP 3.99 H-bonds 3
Exposed fragments: phenyl (6/6 atoms exposed)phenyl (6/7 atoms exposed)phenyl (6/7 atoms exposed)phenyl (6/6 atoms exposed)phenyl (6/6 atoms exposed)aliphatic chain/group (2 atoms exposed)
Final rank2.374Score-23.843
Inter norm-0.762Intra norm-0.007
Top1000noExcludedno
Contacts10H-bonds3
Artifact reasongeometry warning; 13 clashes; 1 protein clash
Residues
ARG242 ARG337 ASP243 ASP385 GLU384 LEU339 PHE383 SER282 THR241 VAL336

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

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
Jaccard0.47RMSD-
HB strict0Strict recall0.00
HB same residue+role1HB role recall0.20
HB same residue1HB residue recall0.20

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
186 2.3742284399744698 -0.761916 -23.8427 3 10 8 0.53 0.20 - 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 -23.843kcal/mol
Ligand efficiency (LE) -0.7691kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -7.493
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 31HA

Physicochemical properties

Molecular weight 412.6Da
Lipinski: ≤ 500 Da
LogP (cLogP) 3.99
Lipinski: ≤ 5
Rotatable bonds 6

Conformational strain (MMFF94s)

Strain energy (ΔE) 16.98kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 120.88kcal/mol
Minimised FF energy 103.90kcal/mol

SASA & burial

✓ computed
SASA (unbound) 696.9Ų
Total solvent-accessible surface area of free ligand
BSA total 447.1Ų
Buried surface area upon binding
BSA apolar 432.1Ų
Hydrophobic contacts buried
BSA polar 15.0Ų
Polar contacts buried
Fraction buried 64.2%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 96.7%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -2624.9Ų
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 1406.0Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)