FAIRMol

MK155

Pose ID 11137 Compound 73 Pose 294

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 MK155
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 mixed SASA done
Strain ΔE
16.3 kcal/mol
Protein clashes
2
Internal clashes
2
Native overlap
contact recall 0.50, Jaccard 0.24, H-bond role recall 0.00
Burial
77%
Hydrophobic fit
83%
Reason: no major geometry red flags detected
2 protein-contact clashes 39% of hydrophobic surface appears solvent-exposed (9/23 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 (-0.787 kcal/mol/HA) ✓ Good fit quality (FQ -7.59) ✓ Strong H-bond network (8 bonds) ✓ Deep burial (77% SASA buried) ✓ Lipophilic contacts well-matched (83%) ✗ Moderate strain (16.3 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (11)
Score
-23.599
kcal/mol
LE
-0.787
kcal/mol/HA
Fit Quality
-7.59
FQ (Leeson)
HAC
30
heavy atoms
MW
410
Da
LogP
4.14
cLogP
Strain ΔE
16.3 kcal/mol
SASA buried
77%
Lipo contact
83% BSA apolar/total
SASA unbound
702 Ų
Apolar buried
448 Ų

Interaction summary

HB 8 HY 8 PI 1 CLASH 2 ⚠ Exposure 39%
⚠️Partial hydrophobic solvent exposure
39% of hydrophobic surface appears solvent-exposed (9/23 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
Non-polar atoms 23 Buried (contacted) 14 Exposed 9 LogP 4.14 H-bonds 8
Exposed fragments: phenyl (6/6 atoms exposed)aliphatic chain/group (3 atoms exposed)
Final rank3.895Score-23.599
Inter norm-0.850Intra norm0.064
Top1000noExcludedno
Contacts19H-bonds8
Artifact reasongeometry warning; 11 clashes; 2 protein clashes
Residues
ALA284 ALA363 ARG228 CYS375 GLY195 GLY196 GLY197 GLY229 GLY286 GLY376 ILE199 ILE285 LEU227 PHE198 PHE230 SER364 THR374 TYR221 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 overlap6Native recall0.50
Jaccard0.24RMSD-
HB strict0Strict recall0.00
HB same residue+role0HB role recall0.00
HB same residue0HB residue recall0.00

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
327 0.8171546905266917 -0.881496 -24.9437 2 19 0 0.00 0.00 - no Open
252 1.25262528314132 -0.815055 -21.9899 5 19 0 0.00 0.00 - no Open
190 2.393610264960986 -1.01227 -27.9274 9 17 0 0.00 0.00 - no Open
274 2.6728153685243323 -0.971128 -26.73 9 17 0 0.00 0.00 - no Open
228 3.509170011564179 -0.852226 -22.326 3 16 0 0.00 0.00 - no Open
296 3.6097912474495737 -0.80505 -19.7428 6 12 0 0.00 0.00 - no Open
294 3.8954333947123394 -0.850379 -23.5994 8 19 6 0.50 0.00 - no Current
204 3.980686356420171 -1.15557 -33.8409 13 17 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 -23.599kcal/mol
Ligand efficiency (LE) -0.7866kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -7.588
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 30HA

Physicochemical properties

Molecular weight 410.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 4.14
Lipinski: ≤ 5
Rotatable bonds 7

Conformational strain (MMFF94s)

Strain energy (ΔE) 16.29kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 62.88kcal/mol
Minimised FF energy 46.59kcal/mol

SASA & burial

✓ computed
SASA (unbound) 701.9Ų
Total solvent-accessible surface area of free ligand
BSA total 542.0Ų
Buried surface area upon binding
BSA apolar 448.1Ų
Hydrophobic contacts buried
BSA polar 93.9Ų
Polar contacts buried
Fraction buried 77.2%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 82.7%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -6569.3Ų
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 2065.8Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)