FAIRMol

KB_HAT_90

Pose ID 13642 Compound 404 Pose 84

DB fairmolDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T21
T. cruzi R5P T. cruzi
Ligand KB_HAT_90
PDB3K7O

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
54.9 kcal/mol
Protein clashes
1
Internal clashes
1
Native overlap
contact recall 0.93, Jaccard 0.76, H-bond role recall 0.22
Burial
74%
Hydrophobic fit
78%
Reason: strain 54.9 kcal/mol
strain ΔE 54.9 kcal/mol 1 protein-contact clashes 55% of hydrophobic surface appears solvent-exposed (11/20 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
EcoTox / ADMET In-silico prediction only
Fish LC₅₀
Not classified (>100 mg/L)
Daphnia EC₅₀
Not classified (>100 mg/L)
Algae IC₅₀
Not classified (>100 mg/L)
Bioaccum.
Not B (BCF≤2000)
Persistent
No
ADMET alerts (in-silico)
hERG Low Ames Clear DILI Low
Molecular report
Full metrics ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Excellent LE (-0.801 kcal/mol/HA) ✓ Good fit quality (FQ -7.72) ✓ Strong H-bond network (8 bonds) ✓ Deep burial (74% SASA buried) ✓ Lipophilic contacts well-matched (78%) ✗ Extreme strain energy (54.9 kcal/mol) ✗ Geometry warnings ✗ Internal clashes (8)
Score
-24.017
kcal/mol
LE
-0.801
kcal/mol/HA
Fit Quality
-7.72
FQ (Leeson)
HAC
30
heavy atoms
MW
411
Da
LogP
0.92
cLogP
Final rank
4.8423
rank score
Inter norm
-0.847
normalised
Contacts
16
H-bonds 12
Strain ΔE
54.9 kcal/mol
SASA buried
74%
Lipo contact
78% BSA apolar/total
SASA unbound
647 Ų
Apolar buried
375 Ų

Interaction summary

HBD 2 HBA 6 HY 3 PI 3 CLASH 1

HBD/HBA · H-bonds (geometric)

HBD = ligand donates H · HBA = ligand accepts H · ~ = weak (≥110°). Mode: strict. Residues: 4.

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.
Name3K7OContacts14
PoseOpen native poseHB0
IFP residues
ARG137 ARG141 ASN103 HIS102 HIS138 ASP10 CYS69 GLY70 GLY74 HIS11 ILE73 PRO12 SER71 TYR46
Current overlap13Native recall0.93
Jaccard0.76RMSD-
HB strict3Strict recall0.25
HB same residue+role2HB role recall0.22
HB same residue2HB residue recall0.25

Protein summary

305 residues
Protein targetT21Atoms4646
Residues305Chains2
Residue summaryARG:576; ILE:532; VAL:512; GLU:420; ALA:360; PHE:240; HIS:238; LYS:220; THR:210; LEU:190; PRO:168; TYR:168; GLY:154; SER:154; ASP:144; ASN:112

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
86 1.3201264683957115 -0.864526 -23.4481 7 19 0 0.00 0.00 - no Open
125 2.369476885666318 -0.973188 -27.5063 6 20 0 0.00 0.00 - no Open
99 3.0564802030326783 -0.996931 -27.457 12 15 0 0.00 0.00 - no Open
84 4.842302807097063 -0.847311 -24.0171 12 16 13 0.93 0.22 - 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 -24.017kcal/mol
Ligand efficiency (LE) -0.8006kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -7.723
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 30HA

Physicochemical properties

Molecular weight 411.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 0.92
Lipinski: ≤ 5
Rotatable bonds 10

Conformational strain (MMFF94s)

Strain energy (ΔE) 54.94kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 190.77kcal/mol
Minimised FF energy 135.83kcal/mol

SASA & burial

✓ computed
SASA (unbound) 646.9Ų
Total solvent-accessible surface area of free ligand
BSA total 479.2Ų
Buried surface area upon binding
BSA apolar 375.1Ų
Hydrophobic contacts buried
BSA polar 104.1Ų
Polar contacts buried
Fraction buried 74.1%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 78.3%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -2270.0Ų
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 2482.0Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 735.3Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)