FAIRMol

KB_chagas_130

Pose ID 4207 Compound 2697 Pose 144

DB fairmolDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T07
T. brucei PTR1 T. brucei
Ligand KB_chagas_130
PDB6RX6

3D complex viewer

Strict H-bonds Permissive H-bonds
Viewer legend
Protein receptor
Pocket residues
Cofactor context
Docked ligand
Overall assessment
Promising SASA cached
Promising but geometrically suspicious
Binding strong Geometry low Native strong SASA done
Strain ΔE
12.6 kcal/mol
Protein clashes
2
Internal clashes
8
Native overlap
contact recall 0.74, Jaccard 0.67, H-bond role recall 0.20
Burial
98%
Hydrophobic fit
69%
Reason: 8 internal clashes
2 protein-contact clashes 8 intramolecular clashes
Molecular report
Full metrics ↗
Promising Reasonable quality metrics. Warrants further investigation.
✓ Excellent LE (-1.358 kcal/mol/HA) ✓ Good fit quality (FQ -11.98) ✓ Deep burial (98% SASA buried) ✓ Lipophilic contacts well-matched (69%) ✗ Moderate strain (12.6 kcal/mol) ✗ Geometry warnings ✗ Minor protein-contact clashes (2) ✗ Internal clashes (8)
Score
-31.226
kcal/mol
LE
-1.358
kcal/mol/HA
Fit Quality
-11.98
FQ (Leeson)
HAC
23
heavy atoms
MW
326
Da
LogP
3.27
cLogP
Final rank
-0.0457
rank score
Inter norm
-1.309
normalised
Contacts
16
H-bonds 3
Strain ΔE
12.6 kcal/mol
SASA buried
98%
Lipo contact
69% BSA apolar/total
SASA unbound
542 Ų
Apolar buried
370 Ų

Interaction summary

HBA 1 HY 10 PI 3 CLASH 0

HBD/HBA · H-bonds (geometric)

HBD = ligand donates H · HBA = ligand accepts H · ~ = weak (≥110°). Mode: strict. Residues: 1.

PI · π–π interactions

Native π–π recall is disabled because no explicit native π–π reference was stored.

HY · Hydrophobic contacts

CLASH · Clashes

No clash · clashes detected for this pose.

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
NameTbPTR1_cW_6RX6_ReadyContacts19
PoseOpen native poseHB0
IFP residues
ARG14 ASP161 CYS168 GLY205 LEU208 LEU209 LYS178 MET213 NAP301 PHE171 PHE97 PRO210 PRO99 SER207 SER95 TRP221 TYR174 TYR98 VAL206
Current overlap14Native recall0.74
Jaccard0.67RMSD-
HB strict1Strict recall0.17
HB same residue+role1HB role recall0.20
HB same residue2HB residue recall0.40

Protein summary

275 residues
Protein targetT07Atoms3932
Residues275Chains3
Residue summaryLEU:437; VAL:433; ALA:361; ARG:288; ILE:266; GLU:210; LYS:198; SER:198; ASN:182; THR:154; GLN:153; PHE:140; PRO:140; TYR:126; GLY:112; HIS:103

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:NAP301

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
144 -0.04568324895839283 -1.30908 -31.2261 3 16 14 0.74 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 -31.226kcal/mol
Ligand efficiency (LE) -1.3577kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -11.982
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 23HA

Physicochemical properties

Molecular weight 326.4Da
Lipinski: ≤ 500 Da
LogP (cLogP) 3.27
Lipinski: ≤ 5
Rotatable bonds 4

Conformational strain (MMFF94s)

Strain energy (ΔE) 12.58kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 57.38kcal/mol
Minimised FF energy 44.80kcal/mol

SASA & burial

✓ computed
SASA (unbound) 541.5Ų
Total solvent-accessible surface area of free ligand
BSA total 533.4Ų
Buried surface area upon binding
BSA apolar 370.2Ų
Hydrophobic contacts buried
BSA polar 163.2Ų
Polar contacts buried
Fraction buried 98.5%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 69.4%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -1510.1Ų
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 2051.9Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 915.1Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)