FAIRMol

MK219

Pose ID 10529 Compound 464 Pose 364

DB SELECTIONDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T16
T. brucei TR (Dimer interface (site 2)) T. brucei Dimer interface (site 2)
Ligand MK219
PDB6RB5

3D complex viewer

Strict H-bonds Permissive H-bonds
Viewer legend
Protein receptor
Pocket residues
Cofactor context
Docked ligand
Overall assessment
Reject SASA cached
Likely artefact or unreliable pose
Binding strong Geometry medium Native strong SASA done
Strain ΔE
27.4 kcal/mol
Protein clashes
4
Internal clashes
4
Native overlap
contact recall 0.83, Jaccard 0.59
Burial
76%
Hydrophobic fit
83%
Reason: no major geometry red flags detected
4 protein-contact clashes 4 intramolecular clashes
Molecular report
Full metrics ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Excellent LE (-0.573 kcal/mol/HA) ✓ Good fit quality (FQ -5.64) ✓ Strong H-bond network (7 bonds) ✓ Deep burial (76% SASA buried) ✓ Lipophilic contacts well-matched (83%) ✗ High strain energy (27.4 kcal/mol) ✗ Geometry warnings ✗ Protein-contact clashes (7) ✗ Many internal clashes (13)
Score
-18.342
kcal/mol
LE
-0.573
kcal/mol/HA
Fit Quality
-5.64
FQ (Leeson)
HAC
32
heavy atoms
MW
438
Da
LogP
4.28
cLogP
Strain ΔE
27.4 kcal/mol
SASA buried
76%
Lipo contact
83% BSA apolar/total
SASA unbound
725 Ų
Apolar buried
457 Ų

Interaction summary

HB 7 HY 24 PI 1 CLASH 4

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

Final rank1.830Score-18.342
Inter norm-0.720Intra norm0.146
Top1000noExcludedno
Contacts15H-bonds7
Artifact reasongeometry warning; 13 clashes; 7 protein contact clashes; moderate strain Δ 20.5
Residues
ALA209 ALA77 ALA90 ARG74 GLU82 GLY85 LEU73 LYS89 MET70 PHE83 PRO213 SER76 SER86 TRP81 VAL88

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
Name6RB5Contacts12
PoseOpen native poseHB0
IFP residues
ALA90 ARG74 GLY85 LEU73 LYS89 MET70 PHE83 PRO212 PRO213 SER86 SER87 VAL88
Current overlap10Native recall0.83
Jaccard0.59RMSD-
HB strict0Strict recall-
HB same residue+role0HB role recall-
HB same residue0HB residue recall-

Protein summary

493 residues
Protein targetT16Atoms7551
Residues493Chains1
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:276; 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
364 1.829900181254628 -0.719662 -18.3424 7 15 10 0.83 - - no Current
265 2.026313243924789 -1.01026 -23.2914 7 17 0 0.00 - - no Open
329 2.0373471110131636 -0.869732 -22.9516 3 18 0 0.00 - - no Open
330 2.058710961639984 -0.909592 -23.8784 2 20 0 0.00 - - no Open
273 2.6597483939163937 -1.27139 -31.6043 10 19 0 0.00 - - no Open
339 2.6953150877472445 -0.847963 -22.7415 4 18 0 0.00 - - no Open
216 3.6249745621726803 -1.05167 -23.8418 13 18 0 0.00 - - no Open
267 3.990038112087562 -0.793892 -22.5817 3 14 0 0.00 - - no Open
240 4.268181873602591 -0.970374 -21.8269 13 23 0 0.00 - - no Open
313 4.372928356142067 -0.902686 -22.7305 9 19 0 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 -18.342kcal/mol
Ligand efficiency (LE) -0.5732kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -5.637
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 32HA

Physicochemical properties

Molecular weight 437.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 4.28
Lipinski: ≤ 5
Rotatable bonds 9

Conformational strain (MMFF94s)

Strain energy (ΔE) 27.37kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 52.26kcal/mol
Minimised FF energy 24.89kcal/mol

SASA & burial

✓ computed
SASA (unbound) 725.1Ų
Total solvent-accessible surface area of free ligand
BSA total 552.9Ų
Buried surface area upon binding
BSA apolar 457.3Ų
Hydrophobic contacts buried
BSA polar 95.6Ų
Polar contacts buried
Fraction buried 76.3%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 82.7%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3235.2Ų
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 4076.6Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1451.7Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)