FAIRMol

KB_chagas_222

Pose ID 4212 Compound 2749 Pose 149

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_222
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
Promising but geometrically suspicious
Binding strong Geometry low Native strong SASA done
Strain ΔE
15.8 kcal/mol
Protein clashes
2
Internal clashes
10
Native overlap
contact recall 0.74, Jaccard 0.67, H-bond role recall 0.00
Burial
77%
Hydrophobic fit
85%
Reason: 10 internal clashes
2 protein-contact clashes 10 intramolecular clashes
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-1.001 kcal/mol/HA) ✓ Good fit quality (FQ -9.84) ✓ Good H-bonds (5 bonds) ✓ Deep burial (77% SASA buried) ✓ Lipophilic contacts well-matched (85%) ✗ Moderate strain (15.8 kcal/mol) ✗ Geometry warnings ✗ Minor protein-contact clashes (2) ✗ Many internal clashes (10)
Score
-32.019
kcal/mol
LE
-1.001
kcal/mol/HA
Fit Quality
-9.84
FQ (Leeson)
HAC
32
heavy atoms
MW
432
Da
LogP
4.67
cLogP
Strain ΔE
15.8 kcal/mol
SASA buried
77%
Lipo contact
85% BSA apolar/total
SASA unbound
723 Ų
Apolar buried
471 Ų

Interaction summary

HB 5 HY 24 PI 5 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 rank0.483Score-32.019
Inter norm-1.023Intra norm0.023
Top1000noExcludedno
Contacts16H-bonds5
Artifact reasongeometry warning; 10 clashes; 2 protein contact clashes; 1 severe cofactor-context clash
Residues
ARG14 ASP161 CYS168 GLU217 GLY205 LEU209 LYS220 MET213 NAP301 PHE171 PHE97 SER207 SER95 TRP221 TYR174 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 overlap14Native recall0.74
Jaccard0.67RMSD-
HB strict0Strict recall0.00
HB same residue+role0HB role recall0.00
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
149 0.4834763231177681 -1.02333 -32.0185 5 16 14 0.74 0.00 - no Current
177 1.224492198851786 -0.667911 -17.4125 3 14 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 -32.019kcal/mol
Ligand efficiency (LE) -1.0006kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -9.840
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 32HA

Physicochemical properties

Molecular weight 432.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 4.67
Lipinski: ≤ 5
Rotatable bonds 4

Conformational strain (MMFF94s)

Strain energy (ΔE) 15.79kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 58.62kcal/mol
Minimised FF energy 42.83kcal/mol

SASA & burial

✓ computed
SASA (unbound) 722.8Ų
Total solvent-accessible surface area of free ligand
BSA total 554.4Ų
Buried surface area upon binding
BSA apolar 470.6Ų
Hydrophobic contacts buried
BSA polar 83.8Ų
Polar contacts buried
Fraction buried 76.7%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 84.9%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -1703.1Ų
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 969.0Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)