FAIRMol

KB_HAT_169

Pose ID 13017 Compound 1099 Pose 138

DB fairmolDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T20
T. brucei TR (Z-site (fragment hotspot)) T. brucei Z-site (fragment hotspot)
Ligand KB_HAT_169
PDB9IFH

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 strong SASA done
Strain ΔE
19.2 kcal/mol
Protein clashes
1
Internal clashes
1
Native overlap
contact recall 0.88, Jaccard 0.64, H-bond role recall 1.00
Burial
46%
Hydrophobic fit
82%
Reason: no major geometry red flags detected
1 protein-contact clashes
EcoTox / ADMET In-silico prediction only
Fish LC₅₀
Cat. 3 — Harmful (10–100 mg/L)
Daphnia EC₅₀
Cat. 3 — Harmful (10–100 mg/L)
Algae IC₅₀
Cat. 3 — Harmful (10–100 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 (-0.634 kcal/mol/HA) ✓ Good fit quality (FQ -6.12) ✓ Good H-bonds (5 bonds) ✓ Good burial (46% SASA buried) ✓ Lipophilic contacts well-matched (82%) ✗ Moderate strain (19.2 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (11)
Score
-19.022
kcal/mol
LE
-0.634
kcal/mol/HA
Fit Quality
-6.12
FQ (Leeson)
HAC
30
heavy atoms
MW
426
Da
LogP
3.31
cLogP
Final rank
2.8000
rank score
Inter norm
-0.667
normalised
Contacts
10
H-bonds 6
Strain ΔE
19.2 kcal/mol
SASA buried
46%
Lipo contact
82% BSA apolar/total
SASA unbound
681 Ų
Apolar buried
256 Ų

Interaction summary

HBD 4 HBA 1 HY 3 PI 1 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.
Name9IFHContacts8
PoseOpen native poseHB0
IFP residues
ASN402 GLU467 LEU399 PHE396 PRO398 SER394 SER470 THR397
Current overlap7Native recall0.88
Jaccard0.64RMSD-
HB strict2Strict recall1.00
HB same residue+role1HB role recall1.00
HB same residue1HB residue recall1.00

Protein summary

492 residues
Protein targetT20Atoms7539
Residues492Chains1
Residue summaryVAL:768; LYS:704; LEU:703; ILE:532; GLU:450; THR:434; ARG:408; PHE:400; ALA:390; ASN:350; PRO:350; GLY:336; SER:319; TYR:294; ASP:264; MET:221

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:FAD501

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
124 1.1693961275555256 -0.896864 -25.4852 4 17 0 0.00 0.00 - no Open
134 1.189017948925249 -1.09425 -32.209 4 15 0 0.00 0.00 - no Open
102 1.6571597359003754 -1.05105 -26.9128 7 19 0 0.00 0.00 - no Open
143 2.2393124046858035 -0.767808 -21.2791 6 12 0 0.00 0.00 - no Open
91 2.526048550418099 -0.787681 -25.4495 5 11 0 0.00 0.00 - no Open
138 2.800038419761972 -0.6671 -19.022 6 10 7 0.88 1.00 - no Current
109 3.0147675137178105 -0.829773 -24.6469 5 15 0 0.00 0.00 - no Open
111 3.6130192592374177 -0.724067 -19.6786 4 12 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 -19.022kcal/mol
Ligand efficiency (LE) -0.6341kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -6.116
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 30HA

Physicochemical properties

Molecular weight 425.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 3.31
Lipinski: ≤ 5
Rotatable bonds 5

Conformational strain (MMFF94s)

Strain energy (ΔE) 19.24kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy -11.21kcal/mol
Minimised FF energy -30.45kcal/mol

SASA & burial

✓ computed
SASA (unbound) 681.4Ų
Total solvent-accessible surface area of free ligand
BSA total 313.7Ų
Buried surface area upon binding
BSA apolar 256.4Ų
Hydrophobic contacts buried
BSA polar 57.3Ų
Polar contacts buried
Fraction buried 46.0%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 81.7%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3120.2Ų
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 4069.8Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1505.6Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)