FAIRMol

TC227

Pose ID 9044 Compound 1324 Pose 236

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 TC227
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
37.2 kcal/mol
Protein clashes
1
Internal clashes
1
Native overlap
contact recall 0.47, Jaccard 0.33, H-bond role recall 0.00
Burial
62%
Hydrophobic fit
77%
Reason: no major geometry red flags detected
1 protein-contact clashes 70% of hydrophobic surface is solvent-exposed (16/23 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 (-0.608 kcal/mol/HA) ✓ Good fit quality (FQ -6.13) ✓ Strong H-bond network (7 bonds) ✓ Good burial (62% SASA buried) ✓ Lipophilic contacts well-matched (77%) ✗ Very high strain energy (37.2 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (13)
Score
-21.265
kcal/mol
LE
-0.608
kcal/mol/HA
Fit Quality
-6.13
FQ (Leeson)
HAC
35
heavy atoms
MW
480
Da
LogP
0.73
cLogP
Strain ΔE
37.2 kcal/mol
SASA buried
62%
Lipo contact
77% BSA apolar/total
SASA unbound
780 Ų
Apolar buried
372 Ų

Interaction summary

HB 7 HY 11 PI 0 CLASH 1 ⚠ Exposure 69%
🚨Solvent-exposed hydrophobic surface — desolvation penalty likely
70% of hydrophobic surface is solvent-exposed (16/23 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) 7 Exposed 16 LogP 0.73 H-bonds 7
Exposed fragments: phenyl (4/6 atoms exposed)phenyl (3/5 atoms exposed)phenyl (6/6 atoms exposed)aliphatic chain/group (5 atoms exposed)
Final rank3.753Score-21.265
Inter norm-0.658Intra norm0.051
Top1000noExcludedno
Contacts13H-bonds7
Artifact reasongeometry warning; 13 clashes; 2 protein clashes; high strain Δ 37.2
Residues
ALA334 ARG242 ARG337 ASP243 ASP385 GLU384 LEU339 MET386 PHE383 THR241 TYR370 VAL335 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 overlap7Native recall0.47
Jaccard0.33RMSD-
HB strict0Strict recall0.00
HB same residue+role0HB role recall0.00
HB same residue1HB residue recall0.20

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
217 1.3512816325645542 -0.920357 -27.0109 11 17 0 0.00 0.00 - no Open
327 2.562616059620716 -0.697603 -19.8611 7 15 0 0.00 0.00 - no Open
264 2.6884770570826144 -0.757765 -24.6339 3 11 0 0.00 0.00 - no Open
195 3.2904397737734246 -0.883666 -31.8781 9 18 0 0.00 0.00 - no Open
231 3.359211608723208 -0.923712 -28.1727 9 16 0 0.00 0.00 - no Open
204 3.710670948551887 -0.794939 -28.899 12 18 0 0.00 0.00 - no Open
236 3.7529471976223454 -0.658299 -21.2653 7 13 7 0.47 0.00 - no Current
160 4.525021538507883 -0.794752 -29.6473 11 18 0 0.00 0.00 - no Open
148 5.360865640556601 -0.707003 -22.203 10 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 -21.265kcal/mol
Ligand efficiency (LE) -0.6076kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -6.128
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 35HA

Physicochemical properties

Molecular weight 480.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 0.73
Lipinski: ≤ 5
Rotatable bonds 10

Conformational strain (MMFF94s)

Strain energy (ΔE) 37.20kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy -28.77kcal/mol
Minimised FF energy -65.97kcal/mol

SASA & burial

✓ computed
SASA (unbound) 779.7Ų
Total solvent-accessible surface area of free ligand
BSA total 481.8Ų
Buried surface area upon binding
BSA apolar 372.2Ų
Hydrophobic contacts buried
BSA polar 109.6Ų
Polar contacts buried
Fraction buried 61.8%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 77.3%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -2538.7Ų
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 1427.0Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)