FAIRMol

KB_chagas_16

Pose ID 3525 Compound 1371 Pose 139

DB SELECTIONDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T06
T. brucei DHFR T. brucei
Ligand KB_chagas_16
PDB8RHT

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
31.1 kcal/mol
Protein clashes
2
Internal clashes
2
Native overlap
contact recall 0.71, Jaccard 0.62, H-bond role recall 0.50
Burial
94%
Hydrophobic fit
86%
Reason: no major geometry red flags detected
2 protein-contact clashes
Molecular report
Full metrics ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Excellent LE (-0.631 kcal/mol/HA) ✓ Good fit quality (FQ -5.74) ✓ Good H-bonds (3 bonds) ✓ Deep burial (94% SASA buried) ✓ Lipophilic contacts well-matched (86%) ✗ Very high strain energy (31.1 kcal/mol) ✗ Geometry warnings ✗ Protein-contact clashes (5) ✗ Many internal clashes (12)
Score
-15.784
kcal/mol
LE
-0.631
kcal/mol/HA
Fit Quality
-5.74
FQ (Leeson)
HAC
25
heavy atoms
MW
344
Da
LogP
1.35
cLogP
Final rank
1.3571
rank score
Inter norm
-0.906
normalised
Contacts
18
H-bonds 6
Strain ΔE
31.1 kcal/mol
SASA buried
94%
Lipo contact
86% BSA apolar/total
SASA unbound
599 Ų
Apolar buried
485 Ų

Interaction summary

HBD 3 HY 8 PI 3 CLASH 2

HBD/HBA · H-bonds (geometric)

HBD = ligand donates H · HBA = ligand accepts H · ~ = weak (≥110°). Mode: strict. Residues: 3.

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.
Name8RHTContacts21
PoseOpen native poseHB0
IFP residues
ALA34 ASP54 HIS182 ILE160 ILE47 LEU90 LEU97 MET55 NDP301 PHE233 PHE58 PHE94 PRO91 SER89 THR184 THR86 TRP49 TYR166 TYR57 VAL32 VAL33
Current overlap15Native recall0.71
Jaccard0.62RMSD-
HB strict2Strict recall0.40
HB same residue+role2HB role recall0.50
HB same residue2HB residue recall0.50

Protein summary

223 residues
Protein targetT06Atoms3452
Residues223Chains1
Residue summaryARG:408; VAL:352; LYS:308; LEU:304; PRO:238; ILE:209; GLU:195; THR:182; SER:176; ALA:160; PHE:140; ASN:126; GLY:126; ASP:108; GLN:85; NDP:74

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:NDP301

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
130 1.0027683112845442 -1.22842 -30.8121 10 16 0 0.00 0.00 - no Open
139 1.357070151489854 -0.905977 -15.7844 6 18 15 0.71 0.50 - no Current
155 3.106656649132985 -1.08871 -24.2879 9 18 1 0.05 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 -15.784kcal/mol
Ligand efficiency (LE) -0.6314kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -5.740
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 25HA

Physicochemical properties

Molecular weight 344.4Da
Lipinski: ≤ 500 Da
LogP (cLogP) 1.35
Lipinski: ≤ 5
Rotatable bonds 6

Conformational strain (MMFF94s)

Strain energy (ΔE) 31.13kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy -172.90kcal/mol
Minimised FF energy -204.03kcal/mol

SASA & burial

✓ computed
SASA (unbound) 598.6Ų
Total solvent-accessible surface area of free ligand
BSA total 562.7Ų
Buried surface area upon binding
BSA apolar 485.2Ų
Hydrophobic contacts buried
BSA polar 77.5Ų
Polar contacts buried
Fraction buried 94.0%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 86.2%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -1740.2Ų
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 1808.8Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 585.3Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)