FAIRMol

MK217

Pose ID 11154 Compound 135 Pose 311

DB SELECTIONDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T17
T. brucei TR (Doorstop site) T. brucei Doorstop site
Ligand MK217
PDB5S9T

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 high Native strong SASA done
Strain ΔE
20.5 kcal/mol
Protein clashes
2
Internal clashes
2
Native overlap
contact recall 0.83, Jaccard 0.53, H-bond role recall 1.00
Burial
74%
Hydrophobic fit
79%
Reason: no major geometry red flags detected
2 protein-contact clashes 43% of hydrophobic surface appears solvent-exposed (10/23 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.805 kcal/mol/HA) ✓ Good fit quality (FQ -7.76) ✓ Strong H-bond network (8 bonds) ✓ Deep burial (74% SASA buried) ✓ Lipophilic contacts well-matched (79%) ✗ High strain energy (20.5 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (13)
Score
-24.146
kcal/mol
LE
-0.805
kcal/mol/HA
Fit Quality
-7.76
FQ (Leeson)
HAC
30
heavy atoms
MW
427
Da
LogP
4.61
cLogP
Strain ΔE
20.5 kcal/mol
SASA buried
74%
Lipo contact
79% BSA apolar/total
SASA unbound
688 Ų
Apolar buried
403 Ų

Interaction summary

HB 8 HY 9 PI 1 CLASH 2 ⚠ Exposure 43%
⚠️Partial hydrophobic solvent exposure
43% of hydrophobic surface appears solvent-exposed (10/23 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
Non-polar atoms 23 Buried (contacted) 13 Exposed 10 LogP 4.61 H-bonds 8
Exposed fragments: phenyl (6/6 atoms exposed)aliphatic chain/group (4 atoms exposed)
Final rank3.919Score-24.146
Inter norm-0.846Intra norm0.041
Top1000noExcludedno
Contacts17H-bonds8
Artifact reasongeometry warning; 13 clashes; 2 protein clashes; moderate strain Δ 20.5
Residues
ALA363 ARG228 ARG331 CYS375 GLY197 GLY229 GLY376 ILE378 LEU227 LEU332 LEU334 MET333 PHE198 PHE230 SER364 THR374 VAL362

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

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 overlap10Native recall0.83
Jaccard0.53RMSD-
HB strict1Strict recall1.00
HB same residue+role1HB role recall1.00
HB same residue1HB residue recall1.00

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

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
338 1.1547768705232146 -0.933689 -25.1453 11 21 0 0.00 0.00 - no Open
327 2.1668862228610912 -1.02891 -28.665 4 19 0 0.00 0.00 - no Open
287 2.8559837909450883 -0.774378 -21.259 5 16 0 0.00 0.00 - no Open
208 3.7289272371499456 -1.00251 -27.321 7 17 0 0.00 0.00 - no Open
311 3.9191241786417086 -0.845928 -24.1464 8 17 10 0.83 1.00 - no Current
362 4.234418293304888 -0.826607 -20.814 7 14 0 0.00 0.00 - no Open
392 4.656774794069281 -0.888962 -22.0884 10 12 0 0.00 0.00 - no Open
235 4.770647973411289 -1.11974 -29.3968 11 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 -24.146kcal/mol
Ligand efficiency (LE) -0.8049kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -7.764
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 30HA

Physicochemical properties

Molecular weight 426.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 4.61
Lipinski: ≤ 5
Rotatable bonds 7

Conformational strain (MMFF94s)

Strain energy (ΔE) 20.54kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 60.83kcal/mol
Minimised FF energy 40.29kcal/mol

SASA & burial

✓ computed
SASA (unbound) 688.3Ų
Total solvent-accessible surface area of free ligand
BSA total 510.1Ų
Buried surface area upon binding
BSA apolar 403.4Ų
Hydrophobic contacts buried
BSA polar 106.8Ų
Polar contacts buried
Fraction buried 74.1%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 79.1%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -6566.1Ų
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 2062.0Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)