FAIRMol

Z426041342

Pose ID 13266 Compound 3542 Pose 387

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 Z426041342
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 medium Native strong SASA done
Strain ΔE
39.7 kcal/mol
Protein clashes
3
Internal clashes
3
Native overlap
contact recall 0.75, Jaccard 0.43, H-bond role recall 0.00
Burial
60%
Hydrophobic fit
68%
Reason: no major geometry red flags detected
3 protein-contact clashes 3 intramolecular clashes
EcoTox / ADMET In-silico prediction only
Fish LC₅₀
Cat. 3 — Harmful (10–100 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 (-0.400 kcal/mol/HA) ✓ Good fit quality (FQ -3.73) ✓ Good H-bonds (4 bonds) ✓ Good burial (60% SASA buried) ✓ Lipophilic contacts well-matched (68%) ✗ Very high strain energy (39.7 kcal/mol) ✗ Geometry warnings ✗ Internal clashes (6)
Score
-10.809
kcal/mol
LE
-0.400
kcal/mol/HA
Fit Quality
-3.73
FQ (Leeson)
HAC
27
heavy atoms
MW
408
Da
LogP
2.56
cLogP
Final rank
3.2857
rank score
Inter norm
-0.724
normalised
Contacts
12
H-bonds 5
Strain ΔE
39.7 kcal/mol
SASA buried
60%
Lipo contact
68% BSA apolar/total
SASA unbound
667 Ų
Apolar buried
268 Ų

Interaction summary

HBA 4 HY 3 PI 2 CLASH 3

HBD/HBA · H-bonds (geometric)

HBD = ligand donates H · HBA = ligand accepts H · ~ = weak (≥110°). Mode: strict. 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: strict.
Name9IFHContacts8
PoseOpen native poseHB0
IFP residues
ASN402 GLU467 LEU399 PHE396 PRO398 SER394 SER470 THR397
Current overlap6Native recall0.75
Jaccard0.43RMSD-
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
387 3.285700678836707 -0.723755 -10.8095 5 12 6 0.75 0.00 - no Current
364 3.6972539831852793 -1.16852 -27.4379 8 22 0 0.00 0.00 - no Open
390 4.168243620208268 -0.929845 -20.354 13 16 0 0.00 0.00 - no Open
340 4.504355784231469 -1.05457 -17.1995 12 18 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 -10.809kcal/mol
Ligand efficiency (LE) -0.4004kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -3.735
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 27HA

Physicochemical properties

Molecular weight 407.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 2.56
Lipinski: ≤ 5
Rotatable bonds 6

Conformational strain (MMFF94s)

Strain energy (ΔE) 39.69kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 72.52kcal/mol
Minimised FF energy 32.83kcal/mol

SASA & burial

✓ computed
SASA (unbound) 667.4Ų
Total solvent-accessible surface area of free ligand
BSA total 397.0Ų
Buried surface area upon binding
BSA apolar 268.1Ų
Hydrophobic contacts buried
BSA polar 129.0Ų
Polar contacts buried
Fraction buried 59.5%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 67.5%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3090.9Ų
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 1504.6Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)