FAIRMol

OSA_Lib_311

Pose ID 8995 Compound 3230 Pose 187

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_311
PDB1NJJ

3D complex viewer

Strict H-bonds Permissive H-bonds
Viewer legend
Protein receptor
Pocket residues
Cofactor context
Docked ligand
Overall assessment
Reject SASA cached
Likely artefact or unreliable pose
Binding strong Geometry medium Native strong SASA done
Strain ΔE
40.5 kcal/mol
Protein clashes
1
Internal clashes
1
Native overlap
contact recall 0.80, Jaccard 0.60, H-bond role recall 0.20
Burial
67%
Hydrophobic fit
100%
Reason: no major geometry red flags detected
1 protein-contact clashes 75% of hydrophobic surface is solvent-exposed (33/44 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 ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Excellent LE (-0.421 kcal/mol/HA) ✓ Good fit quality (FQ -4.60) ✓ Deep burial (67% SASA buried) ✓ Lipophilic contacts well-matched (100%) ✗ Extreme strain energy (40.5 kcal/mol) ✗ No H-bonds detected ✗ Geometry warnings ✗ Many internal clashes (22)
Score
-20.612
kcal/mol
LE
-0.421
kcal/mol/HA
Fit Quality
-4.60
FQ (Leeson)
HAC
49
heavy atoms
MW
656
Da
LogP
7.02
cLogP
Final rank
2.0234
rank score
Inter norm
-0.456
normalised
Contacts
17
H-bonds 1
Strain ΔE
40.5 kcal/mol
SASA buried
67%
Lipo contact
100% BSA apolar/total
SASA unbound
1039 Ų
Apolar buried
694 Ų

Interaction summary

HB 0 HY 3 PI 0 CLASH 1

HBD/HBA · H-bonds (geometric)

No hbd/hba · h-bonds (geometric) detected for this pose.

PI · π–π interactions

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

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.
Name1NJJContacts15
PoseOpen native poseHB0
IFP residues
ARG22 ARG242 ARG337 ARG342 ASP243 ASP385 GLN341 GLU384 LEU25 LEU339 LEU382 PRO340 PRO344 SER282 THR241
Current overlap12Native recall0.80
Jaccard0.60RMSD-
HB strict0Strict recall0.00
HB same residue+role1HB role recall0.20
HB same residue1HB residue recall0.20

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
161 1.7046483196384499 -0.543317 -26.7988 0 19 0 0.00 0.00 - no Open
187 2.0233650628257442 -0.455594 -20.612 1 17 12 0.80 0.20 - no Current
284 3.0793514184073816 -0.498436 -24.0733 1 14 0 0.00 0.00 - no Open
279 3.291236765499163 -0.508086 -25.1692 1 16 0 0.00 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 -20.612kcal/mol
Ligand efficiency (LE) -0.4207kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -4.603
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 49HA

Physicochemical properties

Molecular weight 656.0Da
Lipinski: ≤ 500 Da
LogP (cLogP) 7.02
Lipinski: ≤ 5
Rotatable bonds 7

Conformational strain (MMFF94s)

Strain energy (ΔE) 40.53kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 129.76kcal/mol
Minimised FF energy 89.22kcal/mol

SASA & burial

✓ computed
SASA (unbound) 1039.3Ų
Total solvent-accessible surface area of free ligand
BSA total 698.1Ų
Buried surface area upon binding
BSA apolar 694.4Ų
Hydrophobic contacts buried
BSA polar 3.7Ų
Polar contacts buried
Fraction buried 67.2%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 99.5%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -2952.6Ų
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 3349.0Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1412.1Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)