FAIRMol

KB_Leish_102

Pose ID 13041 Compound 3842 Pose 162

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 KB_Leish_102
PDB9IFH

3D complex viewer

Strict H-bonds Permissive H-bonds
Viewer legend
Protein receptor
Pocket residues
Cofactor context
Docked ligand
Overall assessment
Promising SASA cached
Promising and worth follow-up
Binding strong Geometry high Native strong SASA done
Strain ΔE
16.5 kcal/mol
Protein clashes
1
Internal clashes
1
Native overlap
contact recall 0.75, Jaccard 0.55, H-bond role recall 0.00
Burial
52%
Hydrophobic fit
90%
Reason: no major geometry red flags detected
1 protein-contact clashes 56% of hydrophobic surface appears solvent-exposed (10/18 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
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 ↗
Promising Reasonable quality metrics. Warrants further investigation.
✓ Excellent LE (-0.824 kcal/mol/HA) ✓ Good fit quality (FQ -7.27) ✓ Good H-bonds (3 bonds) ✓ Good burial (52% SASA buried) ✓ Lipophilic contacts well-matched (90%) ✗ Moderate strain (16.5 kcal/mol) ✗ Geometry warnings ✗ Internal clashes (5)
Score
-18.951
kcal/mol
LE
-0.824
kcal/mol/HA
Fit Quality
-7.27
FQ (Leeson)
HAC
23
heavy atoms
MW
310
Da
LogP
1.57
cLogP
Final rank
1.4927
rank score
Inter norm
-0.900
normalised
Contacts
9
H-bonds 3
Strain ΔE
16.5 kcal/mol
SASA buried
52%
Lipo contact
90% BSA apolar/total
SASA unbound
580 Ų
Apolar buried
275 Ų

Interaction summary

HBD 1 HBA 2 HY 3 PI 1 CLASH 1

HBD/HBA · H-bonds (geometric)

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

PI · π–π interactions

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

HY · Hydrophobic contacts

CLASH · Clashes

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 overlap6Native recall0.75
Jaccard0.55RMSD-
HB strict0Strict recall0.00
HB same residue+role0HB role recall0.00
HB same residue0HB residue recall0.00

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
123 0.10592004599192299 -1.04822 -24.1621 5 13 0 0.00 0.00 - no Open
99 1.288652952551071 -1.1661 -23.8854 7 20 0 0.00 0.00 - no Open
107 1.412855325087305 -1.07972 -22.0499 6 11 0 0.00 0.00 - no Open
162 1.4926657424115972 -0.90001 -18.9506 3 9 6 0.75 0.00 - no Current
137 1.5191068721501768 -0.899115 -16.4714 7 14 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 -18.951kcal/mol
Ligand efficiency (LE) -0.8239kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -7.272
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 23HA

Physicochemical properties

Molecular weight 310.4Da
Lipinski: ≤ 500 Da
LogP (cLogP) 1.57
Lipinski: ≤ 5
Rotatable bonds 3

Conformational strain (MMFF94s)

Strain energy (ΔE) 16.48kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 33.27kcal/mol
Minimised FF energy 16.79kcal/mol

SASA & burial

✓ computed
SASA (unbound) 579.5Ų
Total solvent-accessible surface area of free ligand
BSA total 304.4Ų
Buried surface area upon binding
BSA apolar 274.6Ų
Hydrophobic contacts buried
BSA polar 29.8Ų
Polar contacts buried
Fraction buried 52.5%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 90.2%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3108.6Ų
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 1502.9Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)