FAIRMol

Z56821211

Pose ID 12138 Compound 51 Pose 617

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 Z56821211
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
32.2 kcal/mol
Protein clashes
3
Internal clashes
7
Native overlap
contact recall 0.69, Jaccard 0.50
Burial
75%
Hydrophobic fit
73%
Reason: 7 internal clashes
3 protein-contact clashes 7 intramolecular clashes
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.558 kcal/mol/HA) ✓ Good fit quality (FQ -5.07) ✓ Good H-bonds (3 bonds) ✓ Deep burial (75% SASA buried) ✓ Lipophilic contacts well-matched (73%) ✗ Very high strain energy (32.2 kcal/mol) ✗ Geometry warnings ✗ Minor protein-contact clashes (3) ✗ Internal clashes (7)
Score
-13.954
kcal/mol
LE
-0.558
kcal/mol/HA
Fit Quality
-5.07
FQ (Leeson)
HAC
25
heavy atoms
MW
356
Da
LogP
2.23
cLogP
Strain ΔE
32.2 kcal/mol
SASA buried
75%
Lipo contact
73% BSA apolar/total
SASA unbound
625 Ų
Apolar buried
342 Ų

Interaction summary

HB 3 HY 24 PI 2 CLASH 0

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

No clash · clashes detected for this pose.
Final rank0.536Score-13.954
Inter norm-0.834Intra norm0.276
Top1000noExcludedno
Contacts14H-bonds3
Artifact reasongeometry warning; 7 clashes; 3 protein contact clashes; high strain Δ 32.2
Residues
ASP116 CYS52 GLU18 GLY13 GLY49 ILE339 LEU17 MET113 SER109 SER14 THR335 TRP21 TYR110 VAL53

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 overlap9Native recall0.69
Jaccard0.50RMSD-
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
617 0.5364488371058826 -0.833997 -13.9538 3 14 9 0.69 - - no Current
604 0.6708383599777297 -1.32744 -32.2148 8 18 0 0.00 - - no Open
613 0.7074283955056254 -1.05323 -22.6416 5 15 0 0.00 - - no Open
595 1.5992888634610638 -1.2484 -27.5859 9 14 0 0.00 - - no Open
595 1.664204163524461 -1.35261 -34.5795 9 20 0 0.00 - - no Open
597 2.999156072789758 -1.11196 -25.6511 5 14 0 0.00 - - no Open
635 3.783002463306349 -1.33508 -29.8721 12 23 0 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 -13.954kcal/mol
Ligand efficiency (LE) -0.5582kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -5.074
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 25HA

Physicochemical properties

Molecular weight 356.4Da
Lipinski: ≤ 500 Da
LogP (cLogP) 2.23
Lipinski: ≤ 5
Rotatable bonds 7

Conformational strain (MMFF94s)

Strain energy (ΔE) 32.22kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 96.12kcal/mol
Minimised FF energy 63.90kcal/mol

SASA & burial

✓ computed
SASA (unbound) 624.7Ų
Total solvent-accessible surface area of free ligand
BSA total 469.3Ų
Buried surface area upon binding
BSA apolar 341.8Ų
Hydrophobic contacts buried
BSA polar 127.5Ų
Polar contacts buried
Fraction buried 75.1%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 72.8%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3057.4Ų
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 1464.5Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)