FAIRMol

KB_chagas_23

Pose ID 4194 Compound 2773 Pose 131

DB SELECTIONDocking 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_23
PDB6RX6

3D complex viewer

Strict H-bonds Permissive H-bonds
Viewer legend
Protein receptor
Pocket residues
Cofactor context
Docked ligand
Overall assessment
Reject SASA cached
Promising but geometrically suspicious
Binding strong Geometry low Native strong SASA done
Strain ΔE
60.1 kcal/mol
Protein clashes
0
Internal clashes
15
Native overlap
contact recall 0.89, Jaccard 0.74, H-bond role recall 0.00
Burial
92%
Hydrophobic fit
89%
Reason: 15 internal clashes, strain 60.1 kcal/mol
strain ΔE 60.1 kcal/mol 15 intramolecular clashes
Molecular report
Full metrics ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Excellent LE (-0.818 kcal/mol/HA) ✓ Good fit quality (FQ -7.97) ✓ Deep burial (92% SASA buried) ✓ Lipophilic contacts well-matched (89%) ✗ Extreme strain energy (60.1 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (15)
Score
-25.350
kcal/mol
LE
-0.818
kcal/mol/HA
Fit Quality
-7.97
FQ (Leeson)
HAC
31
heavy atoms
MW
440
Da
LogP
2.56
cLogP
Strain ΔE
60.1 kcal/mol
SASA buried
92%
Lipo contact
89% BSA apolar/total
SASA unbound
715 Ų
Apolar buried
586 Ų

Interaction summary

HB 1 HY 24 PI 4 CLASH 0

HB · H-bonds

Mode: strict. Count shows atom-level H-bonds; unique residues in summary: 0.

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.
Final rank0.715Score-25.350
Inter norm-0.981Intra norm0.163
Top1000noExcludedno
Contacts21H-bonds1
Artifact reasongeometry warning; 15 clashes; high strain Δ 60.1
Residues
ARG14 ASN175 ASP161 CYS168 GLY205 LEU208 LEU209 MET163 MET213 NAP301 PHE171 PHE97 PRO167 PRO210 PRO99 SER207 TRP221 TYR174 TYR98 VAL164 VAL206

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 overlap17Native recall0.89
Jaccard0.74RMSD-
HB strict0Strict recall0.00
HB same residue+role0HB role recall0.00
HB same residue0HB residue recall0.00

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
131 0.7154082813233839 -0.980956 -25.3499 1 21 17 0.89 0.00 - no Current
149 1.4315293474835318 -0.720753 -20.9372 2 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 -25.350kcal/mol
Ligand efficiency (LE) -0.8177kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -7.967
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 31HA

Physicochemical properties

Molecular weight 439.6Da
Lipinski: ≤ 500 Da
LogP (cLogP) 2.56
Lipinski: ≤ 5
Rotatable bonds 8

Conformational strain (MMFF94s)

Strain energy (ΔE) 60.10kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 121.25kcal/mol
Minimised FF energy 61.16kcal/mol

SASA & burial

✓ computed
SASA (unbound) 714.8Ų
Total solvent-accessible surface area of free ligand
BSA total 656.5Ų
Buried surface area upon binding
BSA apolar 586.1Ų
Hydrophobic contacts buried
BSA polar 70.4Ų
Polar contacts buried
Fraction buried 91.8%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 89.3%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -1767.5Ų
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 928.8Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)