FAIRMol

KB_chagas_173

Pose ID 4209 Compound 372 Pose 146

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_173
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
Likely artefact or unreliable pose
Binding strong Geometry medium Native strong SASA done
Strain ΔE
31.2 kcal/mol
Protein clashes
1
Internal clashes
1
Native overlap
contact recall 0.74, Jaccard 0.61, H-bond role recall 0.20
Burial
85%
Hydrophobic fit
90%
Reason: no major geometry red flags detected
1 protein-contact clashes
Molecular report
Full metrics ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Excellent LE (-0.939 kcal/mol/HA) ✓ Good fit quality (FQ -9.14) ✓ Deep burial (85% SASA buried) ✓ Lipophilic contacts well-matched (90%) ✗ Very high strain energy (31.2 kcal/mol) ✗ No H-bonds detected ✗ Geometry warnings ✗ Many internal clashes (13)
Score
-29.100
kcal/mol
LE
-0.939
kcal/mol/HA
Fit Quality
-9.14
FQ (Leeson)
HAC
31
heavy atoms
MW
425
Da
LogP
-0.02
cLogP
Final rank
0.6017
rank score
Inter norm
-1.017
normalised
Contacts
18
H-bonds 2
Strain ΔE
31.2 kcal/mol
SASA buried
85%
Lipo contact
90% BSA apolar/total
SASA unbound
693 Ų
Apolar buried
530 Ų

Interaction summary

HB 0 HY 8 PI 4 CLASH 1

HBD/HBA · H-bonds (geometric)

No hbd/hba · h-bonds (geometric) detected for this pose.

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 overlap14Native recall0.74
Jaccard0.61RMSD-
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
146 0.6016764005703 -1.01691 -29.1003 2 18 14 0.74 0.20 - no Current
167 1.5074193536329035 -0.684838 -21.477 2 14 0 0.00 0.00 - no Open
168 2.137435284910898 -0.857372 -20.2864 2 18 0 0.00 0.00 - no Open
184 2.1996791554150565 -0.847276 -27.5862 2 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 -29.100kcal/mol
Ligand efficiency (LE) -0.9387kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -9.145
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 31HA

Physicochemical properties

Molecular weight 424.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) -0.02
Lipinski: ≤ 5
Rotatable bonds 5

Conformational strain (MMFF94s)

Strain energy (ΔE) 31.18kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 74.56kcal/mol
Minimised FF energy 43.38kcal/mol

SASA & burial

✓ computed
SASA (unbound) 692.7Ų
Total solvent-accessible surface area of free ligand
BSA total 590.7Ų
Buried surface area upon binding
BSA apolar 530.4Ų
Hydrophobic contacts buried
BSA polar 60.3Ų
Polar contacts buried
Fraction buried 85.3%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 89.8%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -1742.8Ų
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 932.1Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)