FAIRMol

KB_chagas_57

Pose ID 4913 Compound 2943 Pose 172

DB fairmolDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T08
T. brucei PTR1 T. brucei
Ligand KB_chagas_57
PDB6RX6

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
23.8 kcal/mol
Protein clashes
0
Internal clashes
2
Native overlap
contact recall 0.26, Jaccard 0.23, H-bond role recall 0.40
Burial
83%
Hydrophobic fit
77%
Reason: no major geometry red flags detected
50% of hydrophobic surface appears solvent-exposed (7/14 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
EcoTox / ADMET In-silico prediction only
Fish LC₅₀
Cat. 2 — Toxic (1–10 mg/L)
Daphnia EC₅₀
Cat. 2 — Toxic (1–10 mg/L)
Algae IC₅₀
Cat. 2 — Toxic (1–10 mg/L)
Bioaccum.
Not B (BCF≤2000)
Persistent
No
ADMET alerts (in-silico)
hERG Medium Ames Clear DILI Low
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-1.402 kcal/mol/HA) ✓ Good fit quality (FQ -12.17) ✓ Good H-bonds (3 bonds) ✓ Deep burial (83% SASA buried) ✓ Lipophilic contacts well-matched (77%) ✗ High strain energy (23.8 kcal/mol) ✗ Geometry warnings
Score
-30.835
kcal/mol
LE
-1.402
kcal/mol/HA
Fit Quality
-12.17
FQ (Leeson)
HAC
22
heavy atoms
MW
336
Da
LogP
3.64
cLogP
Final rank
-0.8378
rank score
Inter norm
-1.476
normalised
Contacts
8
H-bonds 9
Strain ΔE
23.8 kcal/mol
SASA buried
83%
Lipo contact
77% BSA apolar/total
SASA unbound
562 Ų
Apolar buried
361 Ų

Interaction summary

HBD 2 HBA 1 HY 2 PI 1 CLASH 2

HBD/HBA · H-bonds (geometric)

HBD = ligand donates H · HBA = ligand accepts H · ~ = weak (≥110°). Mode: strict. Residues: 2.

PI · π–π interactions

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

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.
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 overlap5Native recall0.26
Jaccard0.23RMSD-
HB strict3Strict recall0.50
HB same residue+role2HB role recall0.40
HB same residue2HB residue recall0.40

Protein summary

258 residues
Protein targetT08Atoms3881
Residues258Chains2
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
172 -0.8378049484528997 -1.47647 -30.8354 9 8 5 0.26 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 -30.835kcal/mol
Ligand efficiency (LE) -1.4016kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -12.169
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 22HA

Physicochemical properties

Molecular weight 335.8Da
Lipinski: ≤ 500 Da
LogP (cLogP) 3.64
Lipinski: ≤ 5
Rotatable bonds 3

Conformational strain (MMFF94s)

Strain energy (ΔE) 23.76kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy -27.75kcal/mol
Minimised FF energy -51.51kcal/mol

SASA & burial

✓ computed
SASA (unbound) 561.7Ų
Total solvent-accessible surface area of free ligand
BSA total 466.6Ų
Buried surface area upon binding
BSA apolar 361.3Ų
Hydrophobic contacts buried
BSA polar 105.3Ų
Polar contacts buried
Fraction buried 83.1%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 77.4%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -1523.1Ų
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 968.4Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)