FAIRMol

KB_HAT_8

Pose ID 9577 Compound 157 Pose 91

DB SELECTIONDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T15
T. brucei TR (Dimer cleft site) T. brucei Dimer cleft site
Ligand KB_HAT_8
PDB9IFF

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
41.9 kcal/mol
Protein clashes
3
Internal clashes
3
Native overlap
contact recall 0.69, Jaccard 0.50
Burial
62%
Hydrophobic fit
77%
Reason: no major geometry red flags detected
3 protein-contact clashes 3 intramolecular clashes 54% of hydrophobic surface appears solvent-exposed (13/24 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
Molecular report
Full metrics ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Excellent LE (-0.713 kcal/mol/HA) ✓ Good fit quality (FQ -7.07) ✓ Strong H-bond network (8 bonds) ✓ Good burial (62% SASA buried) ✓ Lipophilic contacts well-matched (77%) ✗ Extreme strain energy (41.9 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (12)
Score
-23.513
kcal/mol
LE
-0.713
kcal/mol/HA
Fit Quality
-7.07
FQ (Leeson)
HAC
33
heavy atoms
MW
471
Da
LogP
-0.41
cLogP
Strain ΔE
41.9 kcal/mol
SASA buried
62%
Lipo contact
77% BSA apolar/total
SASA unbound
732 Ų
Apolar buried
353 Ų

Interaction summary

HB 8 HY 6 PI 0 CLASH 3 ⚠ Exposure 54%
⚠️Partial hydrophobic solvent exposure
54% of hydrophobic surface appears solvent-exposed (13/24 atoms). Partial exposure is common but may limit selectivity and membrane permeability.
Non-polar atoms 24 Buried (contacted) 11 Exposed 13 LogP -0.41 H-bonds 8
Exposed fragments: phenyl (4/5 atoms exposed)phenyl (6/6 atoms exposed)phenyl (5/6 atoms exposed)aliphatic chain/group (2 atoms exposed)
Final rank3.991Score-23.513
Inter norm-0.782Intra norm0.070
Top1000noExcludedno
Contacts14H-bonds8
Artifact reasongeometry warning; 12 clashes; 2 protein clashes; high strain Δ 41.9
Residues
ALA244 ARG74 ASN208 ASN245 ASP71 GLY214 GLY215 GLY246 LEU73 LYS211 LYS216 MET70 PRO213 VAL88

Protein summary

489 residues
Protein targetT15Atoms7420
Residues489Chains1
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:204

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
Name9IFFContacts13
PoseOpen native poseHB0
IFP residues
ALA209 ARG74 ASN208 GLY214 GLY215 GLY85 LEU73 LYS211 MET70 PHE83 PRO212 PRO213 VAL88
Current overlap9Native recall0.69
Jaccard0.50RMSD-
HB strict0Strict recall-
HB same residue+role0HB role recall-
HB same residue0HB residue recall-

HB · H-bonds

Mode: strict. Count shows atom-level H-bonds; unique residues in summary: 0.

PI · π–π interactions

No pi · π–π interactions detected for this pose.

HY · Hydrophobic contacts

CLASH · Clashes

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
94 0.8968455091820249 -1.00617 -31.9861 3 16 0 0.00 - - no Open
113 1.2787634175823281 -0.946846 -30.1424 6 16 0 0.00 - - no Open
87 2.5833270075649684 -0.72041 -23.1843 6 14 0 0.00 - - no Open
91 3.9910595760413226 -0.782021 -23.5128 8 14 9 0.69 - - no Current
122 4.087349949128517 -0.776292 -23.4709 4 11 0 0.00 - - no Open
70 4.520502492898979 -0.836386 -22.2364 11 18 0 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 -23.513kcal/mol
Ligand efficiency (LE) -0.7125kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -7.069
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 33HA

Physicochemical properties

Molecular weight 470.6Da
Lipinski: ≤ 500 Da
LogP (cLogP) -0.41
Lipinski: ≤ 5
Rotatable bonds 6

Conformational strain (MMFF94s)

Strain energy (ΔE) 41.91kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 296.88kcal/mol
Minimised FF energy 254.98kcal/mol

SASA & burial

✓ computed
SASA (unbound) 732.4Ų
Total solvent-accessible surface area of free ligand
BSA total 455.7Ų
Buried surface area upon binding
BSA apolar 352.6Ų
Hydrophobic contacts buried
BSA polar 103.1Ų
Polar contacts buried
Fraction buried 62.2%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 77.4%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3034.7Ų
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 4005.2Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1557.9Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)