FAIRMol

Z57728545

Pose ID 11481 Compound 2821 Pose 638

DB fairmolDocking pose analysis is being read from this database.
Compound detail Protein structures Back to compounds
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T17
T. brucei TR (Doorstop site) T. brucei Doorstop site
Ligand Z57728545
PDB5S9T↗

3D complex viewer

Strict H-bonds Permissive H-bonds
Viewer legend
Protein receptor
Pocket residues
Cofactor context
Docked ligand
Overall assessment
Reject SASA cached
Promising but geometrically suspicious
Binding strong Geometry low Native mixed SASA done
Strain ΔE
55.0 kcal/mol
Protein clashes
2
Internal clashes
2
Native overlap
contact recall 0.42, Jaccard 0.23, H-bond role recall 0.00
Burial
75%
Hydrophobic fit
70%
Reason: strain 55.0 kcal/mol
strain ΔE 55.0 kcal/mol 2 protein-contact clashes 50% of hydrophobic surface appears solvent-exposed (6/12 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
Molecular report
Full metrics ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Excellent LE (-1.256 kcal/mol/HA) ✓ Good fit quality (FQ -10.72) ✓ Good H-bonds (5 bonds) ✓ Deep burial (75% SASA buried) ✓ Lipophilic contacts well-matched (70%) ✗ Extreme strain energy (55.0 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (12)
Score
-26.383
kcal/mol
LE
-1.256
kcal/mol/HA
Fit Quality
-10.72
FQ (Leeson)
HAC
21
heavy atoms
MW
302
Da
LogP
-1.34
cLogP
Final rank
3.7354
rank score
Inter norm
-1.093
normalised
Contacts
15
H-bonds 8
Strain ΔE
55.0 kcal/mol
SASA buried
75%
Lipo contact
70% BSA apolar/total
SASA unbound
489 Ų
Apolar buried
259 Ų

Interaction summary

HBD 3 HBA 2 HY 2 PI 0 CLASH 2

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

PI · π–π interactions
No pi · π–π interactions detected for this pose.

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.
Name5S9TContacts12
PoseOpen native poseHB0
IFP residues
ALA365 ARG228 ARG331 GLY229 LEU332 LEU334 MET333 PHE198 PHE230 SER364 THR374 VAL366
Current overlap5Native recall0.42
Jaccard0.23RMSD-
HB strict0Strict recall0.00
HB same residue+role0HB role recall0.00
HB same residue0HB residue recall0.00

Protein summary

1033 residues
Protein targetT17Atoms15160
Residues1033Chains2
Residue summaryVAL:1536; LEU:1387; LYS:1386; ILE:1064; GLU:900; THR:868; ARG:816; PHE:800; ALA:780; ASN:700; PRO:686; GLY:672; SER:616; TYR:588; ASP:528; MET:408

Receptor context

2 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 2 Excluded HETATM 0
Kept cofactors / ions
A:FAD501 B:FAD501

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
626 1.187320291425969 -1.74729 -34.383 14 14 0 0.00 0.00 - no Open
637 2.774211074879225 -1.33631 -29.5873 12 14 0 0.00 0.00 - no Open
638 3.735364597790352 -1.09287 -26.3826 8 15 5 0.42 0.00 - 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 -26.383kcal/mol
Ligand efficiency (LE) -1.2563kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -10.716
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 21HA

Physicochemical properties
Molecular weight 302.3Da
Lipinski: ≤ 500 Da
LogP (cLogP) -1.34
Lipinski: ≤ 5
Rotatable bonds 8

Conformational strain (MMFF94s)
Strain energy (ΔE) 54.99kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 173.68kcal/mol
Minimised FF energy 118.69kcal/mol

SASA & burial

✓ computed
SASA (unbound) 489.0Ų
Total solvent-accessible surface area of free ligand
BSA total 368.2Ų
Buried surface area upon binding
BSA apolar 259.2Ų
Hydrophobic contacts buried
BSA polar 109.0Ų
Polar contacts buried
Fraction buried 75.3%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 70.4%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -6301.4Ų
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 8063.1Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 2077.1Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)