FAIRMol

MK24

Pose ID 9088 Compound 4172 Pose 280

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 MK24
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
Promising but geometrically suspicious
Binding strong Geometry low Native strong SASA done
Strain ΔE
38.1 kcal/mol
Protein clashes
0
Internal clashes
16
Native overlap
contact recall 0.60, Jaccard 0.45, H-bond role recall 0.40
Burial
75%
Hydrophobic fit
84%
Reason: 16 internal clashes
16 intramolecular clashes 58% of hydrophobic surface appears solvent-exposed (15/26 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.745 kcal/mol/HA) ✓ Good fit quality (FQ -7.51) ✓ Strong H-bond network (9 bonds) ✓ Deep burial (75% SASA buried) ✓ Lipophilic contacts well-matched (84%) ✗ Very high strain energy (38.1 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (16)
Score
-26.063
kcal/mol
LE
-0.745
kcal/mol/HA
Fit Quality
-7.51
FQ (Leeson)
HAC
35
heavy atoms
MW
503
Da
LogP
2.03
cLogP
Strain ΔE
38.1 kcal/mol
SASA buried
75%
Lipo contact
84% BSA apolar/total
SASA unbound
807 Ų
Apolar buried
508 Ų

Interaction summary

HB 9 HY 9 PI 0 CLASH 0 ⚠ Exposure 57%

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.
⚠️Partial hydrophobic solvent exposure
58% of hydrophobic surface appears solvent-exposed (15/26 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
Non-polar atoms 26 Buried (contacted) 11 Exposed 15 LogP 2.03 H-bonds 9
Exposed fragments: phenyl (6/6 atoms exposed)phenyl (5/6 atoms exposed)aliphatic chain/group (6 atoms exposed)
Final rank3.073Score-26.063
Inter norm-0.652Intra norm-0.092
Top1000noExcludedno
Contacts14H-bonds9
Artifact reasongeometry warning; 16 clashes; 1 protein clash; high strain Δ 38.1
Residues
ARG22 ARG342 ASN20 ASP385 CYS26 GLN341 GLU343 GLU384 LEU25 LEU382 PRO340 SER282 THR21 THR285

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
Jaccard0.45RMSD-
HB strict1Strict recall0.17
HB same residue+role2HB role recall0.40
HB same residue2HB residue recall0.40

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
280 3.072939621275057 -0.652326 -26.0627 9 14 9 0.60 0.40 - no Current
262 4.357606610843862 -0.719793 -20.2471 13 18 0 0.00 0.00 - no Open
352 4.377816770020476 -0.688479 -23.3913 4 15 0 0.00 0.00 - no Open
299 4.8568129299279565 -0.590291 -13.2375 6 10 0 0.00 0.00 - no Open
221 5.152576031245613 -0.894038 -31.6518 8 16 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 -26.063kcal/mol
Ligand efficiency (LE) -0.7446kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -7.511
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 35HA

Physicochemical properties

Molecular weight 502.7Da
Lipinski: ≤ 500 Da
LogP (cLogP) 2.03
Lipinski: ≤ 5
Rotatable bonds 6

Conformational strain (MMFF94s)

Strain energy (ΔE) 38.14kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 97.30kcal/mol
Minimised FF energy 59.16kcal/mol

SASA & burial

✓ computed
SASA (unbound) 806.8Ų
Total solvent-accessible surface area of free ligand
BSA total 605.1Ų
Buried surface area upon binding
BSA apolar 507.9Ų
Hydrophobic contacts buried
BSA polar 97.3Ų
Polar contacts buried
Fraction buried 75.0%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 83.9%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -2656.6Ų
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 1386.7Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)