FAIRMol

MK16

Pose ID 9085 Compound 3501 Pose 277

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 MK16
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 strong SASA done
Strain ΔE
16.9 kcal/mol
Protein clashes
3
Internal clashes
3
Native overlap
contact recall 0.60, Jaccard 0.41, H-bond role recall 0.20
Burial
69%
Hydrophobic fit
84%
Reason: no major geometry red flags detected
3 protein-contact clashes 3 intramolecular clashes 100% of hydrophobic surface is solvent-exposed (23/23 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 (-0.774 kcal/mol/HA) ✓ Good fit quality (FQ -7.39) ✓ Strong H-bond network (6 bonds) ✓ Deep burial (69% SASA buried) ✓ Lipophilic contacts well-matched (84%) ✗ Moderate strain (16.9 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (12)
Score
-22.454
kcal/mol
LE
-0.774
kcal/mol/HA
Fit Quality
-7.39
FQ (Leeson)
HAC
29
heavy atoms
MW
397
Da
LogP
3.64
cLogP
Strain ΔE
16.9 kcal/mol
SASA buried
69%
Lipo contact
84% BSA apolar/total
SASA unbound
686 Ų
Apolar buried
399 Ų

Interaction summary

HB 6 HY 0 PI 0 CLASH 3 ⚠ Exposure 100%

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

🚨Solvent-exposed hydrophobic surface — desolvation penalty likely
100% of hydrophobic surface is solvent-exposed (23/23 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 23 Buried (contacted) 0 Exposed 23 LogP 3.64 H-bonds 6
Exposed fragments: phenyl (6/6 atoms exposed)phenyl (5/6 atoms exposed)phenyl (6/6 atoms exposed)aliphatic chain/group (8 atoms exposed)
Final rank4.649Score-22.454
Inter norm-0.876Intra norm0.102
Top1000noExcludedno
Contacts16H-bonds6
Artifact reasongeometry warning; 12 clashes; 3 protein clashes
Residues
ARG242 ARG337 ARG50 ASP243 ASP385 ASP47 GLU384 LEU339 LEU382 LYS51 MET386 PHE383 PRO338 SER282 THR241 VAL336

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 overlap9Native recall0.60
Jaccard0.41RMSD-
HB strict0Strict recall0.00
HB same residue+role1HB role recall0.20
HB same residue1HB residue recall0.20

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

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
376 3.0386066159493392 -0.850471 -17.8845 8 15 0 0.00 0.00 - no Open
297 3.605093104015848 -0.794204 -18.4183 6 14 0 0.00 0.00 - no Open
185 3.7913852384024302 -0.958573 -20.3291 8 17 0 0.00 0.00 - no Open
277 4.649181311495193 -0.876009 -22.4539 6 16 9 0.60 0.20 - no Current

Molecular metrics

RDKit SASA burial, strain energy (MMFF94s), ligand efficiency and fit quality for this docking pose.
✓ Metrics available

Scoring & efficiency

Docking score -22.454kcal/mol
Ligand efficiency (LE) -0.7743kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -7.391
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 29HA

Physicochemical properties

Molecular weight 397.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 3.64
Lipinski: ≤ 5
Rotatable bonds 7

Conformational strain (MMFF94s)

Strain energy (ΔE) 16.90kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 33.28kcal/mol
Minimised FF energy 16.38kcal/mol

SASA & burial

✓ computed
SASA (unbound) 686.0Ų
Total solvent-accessible surface area of free ligand
BSA total 475.7Ų
Buried surface area upon binding
BSA apolar 399.4Ų
Hydrophobic contacts buried
BSA polar 76.3Ų
Polar contacts buried
Fraction buried 69.4%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 84.0%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -2547.9Ų
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 3349.0Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1378.3Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)