FAIRMol

ulfkktlib_3482

Pose ID 13129 Compound 5214 Pose 250

DB SELECTIONDocking pose analysis is being read from this database.
Compound detail Protein structures Back to compounds
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T20
T. brucei TR (Z-site (fragment hotspot)) T. brucei Z-site (fragment hotspot)
Ligand ulfkktlib_3482
PDB9IFH↗

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 strong SASA done
Strain ΔE
25.3 kcal/mol
Protein clashes
2
Internal clashes
2
Native overlap
contact recall 0.62, Jaccard 0.50, H-bond role recall 0.00
Burial
54%
Hydrophobic fit
84%
Reason: no major geometry red flags detected
2 protein-contact clashes
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.720 kcal/mol/HA) ✓ Good fit quality (FQ -6.63) ✓ Good H-bonds (4 bonds) ✓ Good burial (54% SASA buried) ✓ Lipophilic contacts well-matched (84%) ✗ High strain energy (25.3 kcal/mol) ✗ Geometry warnings
Score
-18.715
kcal/mol
LE
-0.720
kcal/mol/HA
Fit Quality
-6.63
FQ (Leeson)
HAC
26
heavy atoms
MW
381
Da
LogP
2.81
cLogP
Strain ΔE
25.3 kcal/mol
SASA buried
54%
Lipo contact
84% BSA apolar/total
SASA unbound
620 Ų
Apolar buried
283 Ų

Interaction summary

HB 4 HY 14 PI 1 CLASH 2
Final rank2.356Score-18.715
Inter norm-0.766Intra norm0.046
Top1000noExcludedno
Contacts7H-bonds4
Artifact reasongeometry warning; 4 clashes; 1 protein clash; moderate strain Δ 25.3
Residues
ASN402 LEU399 LYS407 PHE396 PRO398 PRO462 THR397

Protein summary

492 residues
Protein targetT20Atoms7539
Residues492Chains1
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:319; 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
A:FAD501

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
Name9IFHContacts8
PoseOpen native poseHB0
IFP residues
ASN402 GLU467 LEU399 PHE396 PRO398 SER394 SER470 THR397
Current overlap5Native recall0.62
Jaccard0.50RMSD-
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
Native π–π recall is disabled because no explicit native π–π reference was stored.

HY · Hydrophobic contacts

CLASH · Clashes

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
250 2.356430882786291 -0.765578 -18.7154 4 7 5 0.62 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 -18.715kcal/mol
Ligand efficiency (LE) -0.7198kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -6.632
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 26HA

Physicochemical properties
Molecular weight 380.9Da
Lipinski: ≤ 500 Da
LogP (cLogP) 2.81
Lipinski: ≤ 5
Rotatable bonds 4

Conformational strain (MMFF94s)
Strain energy (ΔE) 25.27kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 69.26kcal/mol
Minimised FF energy 44.00kcal/mol

SASA & burial

✓ computed
SASA (unbound) 619.6Ų
Total solvent-accessible surface area of free ligand
BSA total 335.9Ų
Buried surface area upon binding
BSA apolar 283.1Ų
Hydrophobic contacts buried
BSA polar 52.8Ų
Polar contacts buried
Fraction buried 54.2%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 84.3%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3116.3Ų
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 4069.8Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1501.0Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)