FAIRMol

MK3

Pose ID 12466 Compound 284 Pose 265

DB fairmolDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T19
T. brucei TR (NADPH binding site) T. brucei NADPH binding site
Ligand MK3
PDB2WOV

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
61.1 kcal/mol
Protein clashes
2
Internal clashes
2
Native overlap
contact recall 0.37, Jaccard 0.36, H-bond role recall 0.60
Burial
56%
Hydrophobic fit
79%
Reason: strain 61.1 kcal/mol
strain ΔE 61.1 kcal/mol 2 protein-contact clashes 78% of hydrophobic surface is solvent-exposed (21/27 atoms). Large non-polar area without protein contacts incurs a desolvation penalty and will reduce binding affinity. Consider truncating or replacing the exposed fragment.
Molecular report
Full metrics ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Excellent LE (-0.812 kcal/mol/HA) ✓ Good fit quality (FQ -8.25) ✓ Strong H-bond network (6 bonds) ✓ Good burial (56% SASA buried) ✓ Lipophilic contacts well-matched (79%) ✗ Extreme strain energy (61.1 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (12)
Score
-29.218
kcal/mol
LE
-0.812
kcal/mol/HA
Fit Quality
-8.25
FQ (Leeson)
HAC
36
heavy atoms
MW
499
Da
LogP
1.32
cLogP
Final rank
3.2535
rank score
Inter norm
-0.958
normalised
Contacts
11
H-bonds 11
Strain ΔE
61.1 kcal/mol
SASA buried
56%
Lipo contact
79% BSA apolar/total
SASA unbound
861 Ų
Apolar buried
382 Ų

Interaction summary

HBD 2 HBA 4 HY 1 PI 0 CLASH 2

HBD/HBA · H-bonds (geometric)

HBD = ligand donates H · HBA = ligand accepts H · ~ = weak (≥110°). Mode: permissive. Residues: 4.

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: permissive.
Name2WOVContacts27
PoseOpen native poseHB0
IFP residues
ALA284 ALA365 ARG222 ARG228 ARG287 ASN223 ASN254 GLN165 GLU202 GLY195 GLY196 GLY197 GLY286 ILE199 ILE285 LEU227 LEU334 LYS60 MET333 NDP800 PHE198 PHE367 PRO167 SER200 TYR221 VAL194 VAL366
Current overlap10Native recall0.37
Jaccard0.36RMSD-
HB strict1Strict recall0.08
HB same residue+role3HB role recall0.60
HB same residue2HB residue recall0.50

Protein summary

493 residues
Protein targetT19Atoms7541
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:330; TYR:294; ASP:264; 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
C:NDP800

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 10 0.37 0.60 - no Current
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 0 0.00 0.00 - no Open
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 -29.218kcal/mol
Ligand efficiency (LE) -0.8116kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -8.249
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) 61.15kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 87.56kcal/mol
Minimised FF energy 26.41kcal/mol

SASA & burial

✓ computed
SASA (unbound) 861.3Ų
Total solvent-accessible surface area of free ligand
BSA total 481.2Ų
Buried surface area upon binding
BSA apolar 381.6Ų
Hydrophobic contacts buried
BSA polar 99.5Ų
Polar contacts buried
Fraction buried 55.9%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 79.3%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3243.9Ų
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 4064.7Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1542.4Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)