FAIRMol

MK3

Pose ID 11119 Compound 284 Pose 276

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 MK3
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 strong SASA done
Strain ΔE
62.8 kcal/mol
Protein clashes
0
Internal clashes
14
Native overlap
contact recall 0.75, Jaccard 0.36, H-bond role recall 0.00
Burial
77%
Hydrophobic fit
80%
Reason: 14 internal clashes, strain 62.8 kcal/mol
strain ΔE 62.8 kcal/mol 14 intramolecular clashes
Molecular report
Full metrics ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Good LE (-0.390 kcal/mol/HA) ✓ Good fit quality (FQ -3.96) ✓ Strong H-bond network (8 bonds) ✓ Deep burial (77% SASA buried) ✓ Lipophilic contacts well-matched (80%) ✗ Extreme strain energy (62.8 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (14)
Score
-14.037
kcal/mol
LE
-0.390
kcal/mol/HA
Fit Quality
-3.96
FQ (Leeson)
HAC
36
heavy atoms
MW
499
Da
LogP
1.32
cLogP
Strain ΔE
62.8 kcal/mol
SASA buried
77%
Lipo contact
80% BSA apolar/total
SASA unbound
861 Ų
Apolar buried
530 Ų

Interaction summary

HB 8 HY 12 PI 0 CLASH 0
Final rank3.867Score-14.037
Inter norm-0.639Intra norm0.249
Top1000noExcludedno
Contacts22H-bonds8
Artifact reasongeometry warning; 14 clashes; 2 protein clashes; high strain Δ 59.3
Residues
ARG228 ARG287 ARG331 CYS375 GLY196 GLY197 GLY229 GLY286 GLY376 HIS428 ILE199 ILE226 ILE285 LEU227 LEU332 MET333 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 overlap9Native recall0.75
Jaccard0.36RMSD-
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

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

HY · Hydrophobic contacts

CLASH · Clashes

No clash · clashes detected for this pose.

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
314 1.8403910590171513 -0.854739 -30.533 4 21 0 0.00 0.00 - no Open
265 3.2535200232590507 -0.957853 -29.2182 11 11 0 0.00 0.00 - no Open
236 3.7004113748811287 -0.679853 -25.4528 6 18 0 0.00 0.00 - no Open
273 3.8458234271104295 -0.611894 -16.691 5 18 0 0.00 0.00 - no Open
276 3.866792565577019 -0.639361 -14.0366 8 22 9 0.75 0.00 - no Current
196 4.975403539515579 -0.770765 -16.315 12 20 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 -14.037kcal/mol
Ligand efficiency (LE) -0.3899kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -3.963
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 36HA

Physicochemical properties

Molecular weight 498.6Da
Lipinski: ≤ 500 Da
LogP (cLogP) 1.32
Lipinski: ≤ 5
Rotatable bonds 12

Conformational strain (MMFF94s)

Strain energy (ΔE) 62.78kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 92.03kcal/mol
Minimised FF energy 29.26kcal/mol

SASA & burial

✓ computed
SASA (unbound) 861.3Ų
Total solvent-accessible surface area of free ligand
BSA total 664.5Ų
Buried surface area upon binding
BSA apolar 530.4Ų
Hydrophobic contacts buried
BSA polar 134.1Ų
Polar contacts buried
Fraction buried 77.2%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 79.8%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -6680.0Ų
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 2090.1Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)