FAIRMol

MK136

Pose ID 9099 Compound 3567 Pose 291

DB SELECTIONDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T14
T. brucei ODC (G418 binding site) T. brucei G418 binding site
Ligand MK136
PDB1NJJ

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 medium Native mixed SASA done
Strain ΔE
14.4 kcal/mol
Protein clashes
3
Internal clashes
3
Native overlap
contact recall 0.53, Jaccard 0.35, H-bond role recall 0.20
Burial
79%
Hydrophobic fit
89%
Reason: no major geometry red flags detected
3 protein-contact clashes 3 intramolecular clashes 100% of hydrophobic surface is solvent-exposed (24/24 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 ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.581 kcal/mol/HA) ✓ Good fit quality (FQ -5.61) ✓ Strong H-bond network (7 bonds) ✓ Deep burial (79% SASA buried) ✓ Lipophilic contacts well-matched (89%) ✗ Moderate strain (14.4 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (12)
Score
-17.440
kcal/mol
LE
-0.581
kcal/mol/HA
Fit Quality
-5.61
FQ (Leeson)
HAC
30
heavy atoms
MW
409
Da
LogP
4.98
cLogP
Strain ΔE
14.4 kcal/mol
SASA buried
79%
Lipo contact
89% BSA apolar/total
SASA unbound
645 Ų
Apolar buried
453 Ų

Interaction summary

HB 7 HY 0 PI 0 CLASH 3 ⚠ Exposure 100%
🚨Solvent-exposed hydrophobic surface — desolvation penalty likely
100% of hydrophobic surface is solvent-exposed (24/24 atoms). Large non-polar area without protein contacts incurs a desolvation penalty and will reduce binding affinity. Consider truncating or replacing the exposed fragment.
Non-polar atoms 24 Buried (contacted) 0 Exposed 24 LogP 4.98 H-bonds 7
Exposed fragments: phenyl (6/6 atoms exposed)phenyl (5/6 atoms exposed)phenyl (3/5 atoms exposed)phenyl (6/6 atoms exposed)aliphatic chain/group (6 atoms exposed)
Final rank2.850Score-17.440
Inter norm-0.786Intra norm0.204
Top1000noExcludedno
Contacts16H-bonds7
Artifact reasongeometry warning; 12 clashes; 1 protein clash
Residues
ALA283 ARG242 ARG337 ARG50 ASP243 ASP385 ASP44 ASP47 GLU384 LEU339 PHE383 PRO338 SER282 THR241 THR285 VAL336

Protein summary

398 residues
Protein targetT14Atoms6140
Residues398Chains1
Residue summaryVAL:592; LEU:513; LYS:484; ARG:432; PHE:420; ILE:418; ASP:349; THR:322; TYR:315; PRO:308; GLU:301; ALA:290; SER:253; GLY:217; ASN:210; GLN:170

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:ORX602

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
Name1NJJContacts15
PoseOpen native poseHB0
IFP residues
ARG22 ARG242 ARG337 ARG342 ASP243 ASP385 GLN341 GLU384 LEU25 LEU339 LEU382 PRO340 PRO344 SER282 THR241
Current overlap8Native recall0.53
Jaccard0.35RMSD-
HB strict0Strict recall0.00
HB same residue+role1HB role recall0.20
HB same residue2HB residue recall0.40

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

No hy · hydrophobic contacts detected for this pose.

CLASH · Clashes

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
308 1.4376320595229573 -0.637943 -13.9525 6 13 0 0.00 0.00 - no Open
269 2.491460509442719 -0.868009 -25.4095 8 16 0 0.00 0.00 - no Open
291 2.8499290863526126 -0.785746 -17.4403 7 16 8 0.53 0.20 - no Current
198 4.9213139476781596 -0.968409 -22.5164 11 19 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 -17.440kcal/mol
Ligand efficiency (LE) -0.5813kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -5.608
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 30HA

Physicochemical properties

Molecular weight 409.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 4.98
Lipinski: ≤ 5
Rotatable bonds 7

Conformational strain (MMFF94s)

Strain energy (ΔE) 14.45kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 59.46kcal/mol
Minimised FF energy 45.01kcal/mol

SASA & burial

✓ computed
SASA (unbound) 644.6Ų
Total solvent-accessible surface area of free ligand
BSA total 507.1Ų
Buried surface area upon binding
BSA apolar 452.9Ų
Hydrophobic contacts buried
BSA polar 54.2Ų
Polar contacts buried
Fraction buried 78.7%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 89.3%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -2522.2Ų
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 3349.0Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1384.4Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)