FAIRMol

ulfkktlib_1515

Pose ID 13112 Compound 5009 Pose 233

DB fairmolDocking pose analysis is being read from this database.
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_1515
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
Promising but geometrically suspicious
Binding strong Geometry low Native strong SASA done
Strain ΔE
32.2 kcal/mol
Protein clashes
0
Internal clashes
9
Native overlap
contact recall 0.62, Jaccard 0.33, H-bond role recall 1.00
Burial
62%
Hydrophobic fit
93%
Reason: 9 internal clashes
9 intramolecular clashes
EcoTox / ADMET In-silico prediction only
Fish LC₅₀
Not classified (>100 mg/L)
Daphnia EC₅₀
Not classified (>100 mg/L)
Algae IC₅₀
Not classified (>100 mg/L)
Bioaccum.
Not B (BCF≤2000)
Persistent
No
ADMET alerts (in-silico)
hERG Low Ames Clear DILI Low
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.816 kcal/mol/HA) ✓ Good fit quality (FQ -7.31) ✓ Good H-bonds (4 bonds) ✓ Good burial (62% SASA buried) ✓ Lipophilic contacts well-matched (93%) ✗ Very high strain energy (32.2 kcal/mol) ✗ Geometry warnings ✗ Internal clashes (9)
Score
-19.574
kcal/mol
LE
-0.816
kcal/mol/HA
Fit Quality
-7.31
FQ (Leeson)
HAC
24
heavy atoms
MW
323
Da
LogP
0.40
cLogP
Final rank
3.9549
rank score
Inter norm
-0.853
normalised
Contacts
12
H-bonds 4
Strain ΔE
32.2 kcal/mol
SASA buried
62%
Lipo contact
93% BSA apolar/total
SASA unbound
598 Ų
Apolar buried
344 Ų

Interaction summary

HBD 3 HBA 1 HY 5 PI 2 CLASH 0

HBD/HBA · H-bonds (geometric)

HBD = ligand donates H · HBA = ligand accepts H · ~ = weak (≥110°). Mode: permissive. Residues: 4.

PI · π–π interactions

Native π–π recall is disabled because no explicit native π–π reference was stored.

HY · Hydrophobic contacts

CLASH · Clashes

No clash · clashes detected for this pose.

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: permissive.
Name9IFHContacts8
PoseOpen native poseHB0
IFP residues
ASN402 GLU467 LEU399 PHE396 PRO398 SER394 SER470 THR397
Current overlap5Native recall0.62
Jaccard0.33RMSD-
HB strict1Strict recall0.50
HB same residue+role1HB role recall1.00
HB same residue1HB residue recall1.00

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

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
186 1.0785366487636192 -1.33554 -31.2401 6 21 0 0.00 0.00 - no Open
233 3.9549272373036755 -0.852733 -19.5737 4 12 5 0.62 1.00 - 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 -19.574kcal/mol
Ligand efficiency (LE) -0.8156kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -7.309
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 24HA

Physicochemical properties

Molecular weight 323.4Da
Lipinski: ≤ 500 Da
LogP (cLogP) 0.40
Lipinski: ≤ 5
Rotatable bonds 7

Conformational strain (MMFF94s)

Strain energy (ΔE) 32.17kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 85.99kcal/mol
Minimised FF energy 53.81kcal/mol

SASA & burial

✓ computed
SASA (unbound) 598.3Ų
Total solvent-accessible surface area of free ligand
BSA total 371.7Ų
Buried surface area upon binding
BSA apolar 344.1Ų
Hydrophobic contacts buried
BSA polar 27.6Ų
Polar contacts buried
Fraction buried 62.1%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 92.6%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3117.6Ų
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 4069.8Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1501.5Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)