FAIRMol

KB_chagas_202

Pose ID 8988 Compound 4155 Pose 180

DB SELECTIONDocking pose analysis is being read from this database.
Compound detail Protein structures Back to compounds
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 KB_chagas_202
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 high Native mixed SASA done
Strain ΔE
15.5 kcal/mol
Protein clashes
1
Internal clashes
1
Native overlap
contact recall 0.53, Jaccard 0.47, H-bond role recall 0.20
Burial
65%
Hydrophobic fit
90%
Reason: no major geometry red flags detected
1 protein-contact clashes 75% of hydrophobic surface is solvent-exposed (15/20 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 (-0.713 kcal/mol/HA) ✓ Good fit quality (FQ -6.65) ✓ Good H-bonds (3 bonds) ✓ Deep burial (65% SASA buried) ✓ Lipophilic contacts well-matched (90%) ✗ Moderate strain (15.5 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (15)
Score
-19.248
kcal/mol
LE
-0.713
kcal/mol/HA
Fit Quality
-6.65
FQ (Leeson)
HAC
27
heavy atoms
MW
365
Da
LogP
1.50
cLogP
Final rank
2.7614
rank score
Inter norm
-0.814
normalised
Contacts
10
H-bonds 3
Strain ΔE
15.5 kcal/mol
SASA buried
65%
Lipo contact
90% BSA apolar/total
SASA unbound
652 Ų
Apolar buried
384 Ų

Interaction summary

HBD 2 HBA 1 HY 1 PI 0 CLASH 1

HBD/HBA · H-bonds (geometric)
HBD = ligand donates H · HBA = ligand accepts H · ~ = weak (≥110°). Mode: strict. Residues: 3.

PI · π–π interactions
No pi · π–π interactions detected for this pose.

HY · Hydrophobic contacts

CLASH · Clashes

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
Jaccard0.47RMSD-
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
180 2.761364113446647 -0.814133 -19.2481 3 10 8 0.53 0.20 - no Current
132 3.225150887347731 -1.19583 -29.3581 6 17 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 -19.248kcal/mol
Ligand efficiency (LE) -0.7129kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -6.651
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 27HA

Physicochemical properties
Molecular weight 365.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 1.50
Lipinski: ≤ 5
Rotatable bonds 5

Conformational strain (MMFF94s)
Strain energy (ΔE) 15.46kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 92.81kcal/mol
Minimised FF energy 77.35kcal/mol

SASA & burial

✓ computed
SASA (unbound) 652.3Ų
Total solvent-accessible surface area of free ligand
BSA total 426.5Ų
Buried surface area upon binding
BSA apolar 383.6Ų
Hydrophobic contacts buried
BSA polar 42.9Ų
Polar contacts buried
Fraction buried 65.4%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 89.9%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -2513.7Ų
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 1424.1Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)