FAIRMol

MK23

Pose ID 9087 Compound 4250 Pose 279

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 MK23
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
34.8 kcal/mol
Protein clashes
2
Internal clashes
2
Native overlap
contact recall 0.53, Jaccard 0.40, H-bond role recall 0.40
Burial
65%
Hydrophobic fit
78%
Reason: no major geometry red flags detected
2 protein-contact clashes
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.614 kcal/mol/HA) ✓ Good fit quality (FQ -6.24) ✓ Strong H-bond network (8 bonds) ✓ Good burial (65% SASA buried) ✓ Lipophilic contacts well-matched (78%) ✗ Very high strain energy (34.8 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (15)
Score
-22.088
kcal/mol
LE
-0.614
kcal/mol/HA
Fit Quality
-6.24
FQ (Leeson)
HAC
36
heavy atoms
MW
517
Da
LogP
2.33
cLogP
Strain ΔE
34.8 kcal/mol
SASA buried
65%
Lipo contact
78% BSA apolar/total
SASA unbound
834 Ų
Apolar buried
422 Ų

Interaction summary

HB 8 HY 23 PI 0 CLASH 2
Final rank4.727Score-22.088
Inter norm-0.692Intra norm0.078
Top1000noExcludedno
Contacts13H-bonds8
Artifact reasongeometry warning; 15 clashes; 3 protein clashes; high strain Δ 34.8
Residues
ARG22 ARG342 ASN20 CYS26 GLN341 GLU343 LEU25 LEU339 LEU382 PRO340 PRO344 THR21 THR285

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
Jaccard0.40RMSD-
HB strict2Strict recall0.33
HB same residue+role2HB role recall0.40
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

CLASH · Clashes

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
279 4.726525485733019 -0.691743 -22.0878 8 13 8 0.53 0.40 - 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 -22.088kcal/mol
Ligand efficiency (LE) -0.6136kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -6.236
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 36HA

Physicochemical properties

Molecular weight 516.7Da
Lipinski: ≤ 500 Da
LogP (cLogP) 2.33
Lipinski: ≤ 5
Rotatable bonds 6

Conformational strain (MMFF94s)

Strain energy (ΔE) 34.81kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 105.34kcal/mol
Minimised FF energy 70.54kcal/mol

SASA & burial

✓ computed
SASA (unbound) 833.8Ų
Total solvent-accessible surface area of free ligand
BSA total 539.3Ų
Buried surface area upon binding
BSA apolar 422.4Ų
Hydrophobic contacts buried
BSA polar 116.9Ų
Polar contacts buried
Fraction buried 64.7%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 78.3%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -2678.9Ų
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 1382.7Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)