FAIRMol

ulfkktlib_1367

Pose ID 11746 Compound 3000 Pose 225

DB SELECTIONDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T18
T. brucei TR (Mepacrine binding site (MBS, site 1)) T. brucei Mepacrine binding site (MBS, site 1)
Ligand ulfkktlib_1367
PDB6RB5

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
26.5 kcal/mol
Protein clashes
0
Internal clashes
10
Native overlap
contact recall 0.62, Jaccard 0.42
Burial
65%
Hydrophobic fit
75%
Reason: 10 internal clashes
10 intramolecular clashes
EcoTox / ADMET In-silico prediction only
Fish LC₅₀
Not classified (>100 mg/L)
Daphnia EC₅₀
Not classified (>100 mg/L)
Algae IC₅₀
Cat. 3 — Harmful (10–100 mg/L)
Bioaccum.
Not B (BCF≤2000)
Persistent
No
ADMET alerts (in-silico)
hERG Medium Ames Clear DILI Low
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.538 kcal/mol/HA) ✓ Good fit quality (FQ -5.19) ✓ Good H-bonds (3 bonds) ✓ Deep burial (65% SASA buried) ✓ Lipophilic contacts well-matched (75%) ✗ High strain energy (26.5 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (10)
Score
-16.140
kcal/mol
LE
-0.538
kcal/mol/HA
Fit Quality
-5.19
FQ (Leeson)
HAC
30
heavy atoms
MW
472
Da
LogP
2.61
cLogP
Final rank
1.8609
rank score
Inter norm
-0.691
normalised
Contacts
14
H-bonds 8
Strain ΔE
26.5 kcal/mol
SASA buried
65%
Lipo contact
75% BSA apolar/total
SASA unbound
715 Ų
Apolar buried
350 Ų

Interaction summary

HBD 2 HBA 1 PC 1 HY 9 PI 1 CLASH 0

HBD/HBA · H-bonds (geometric)

HBD = ligand donates H · HBA = ligand accepts H · ~ = weak (≥110°). Mode: strict. Residues: 3.

PC · Polar contacts (possible, no H geometry)

HBD?/HBA? — heavy-atom distance only, H geometry unavailable. May be real H-bonds.

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: strict.
Name6RB5Contacts13
PoseOpen native poseHB0
IFP residues
ASP116 GLU18 GLY112 ILE106 LEU17 MET113 SER109 THR117 THR335 TRP21 TYR110 VAL53 VAL58
Current overlap8Native recall0.62
Jaccard0.42RMSD-
HB strict0Strict recall-
HB same residue+role0HB role recall-
HB same residue0HB residue recall-

Protein summary

493 residues
Protein targetT18Atoms7550
Residues493Chains1
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:276; 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
204 0.5630994161905085 -1.06327 -30.2984 6 16 0 0.00 - - no Open
225 1.8609023456129228 -0.691242 -16.1397 8 14 8 0.62 - - 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 -16.140kcal/mol
Ligand efficiency (LE) -0.5380kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -5.190
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 30HA

Physicochemical properties

Molecular weight 472.3Da
Lipinski: ≤ 500 Da
LogP (cLogP) 2.61
Lipinski: ≤ 5
Rotatable bonds 6

Conformational strain (MMFF94s)

Strain energy (ΔE) 26.48kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy -24.27kcal/mol
Minimised FF energy -50.74kcal/mol

SASA & burial

✓ computed
SASA (unbound) 714.8Ų
Total solvent-accessible surface area of free ligand
BSA total 466.3Ų
Buried surface area upon binding
BSA apolar 349.5Ų
Hydrophobic contacts buried
BSA polar 116.8Ų
Polar contacts buried
Fraction buried 65.2%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 74.9%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3130.2Ų
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 4076.6Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1528.5Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)