FAIRMol

ulfkktlib_2878

Pose ID 9821 Compound 2644 Pose 335

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 ulfkktlib_2878
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
Promising but geometrically suspicious
Binding strong Geometry low Native strong SASA done
Strain ΔE
53.5 kcal/mol
Protein clashes
4
Internal clashes
4
Native overlap
contact recall 0.62, Jaccard 0.42
Burial
80%
Hydrophobic fit
85%
Reason: strain 53.5 kcal/mol
strain ΔE 53.5 kcal/mol 4 protein-contact clashes 4 intramolecular clashes
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 (-1.238 kcal/mol/HA) ✓ Good fit quality (FQ -11.10) ✓ Good H-bonds (5 bonds) ✓ Deep burial (80% SASA buried) ✓ Lipophilic contacts well-matched (85%) ✗ Extreme strain energy (53.5 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (11)
Score
-29.724
kcal/mol
LE
-1.238
kcal/mol/HA
Fit Quality
-11.10
FQ (Leeson)
HAC
24
heavy atoms
MW
321
Da
LogP
1.11
cLogP
Final rank
2.4222
rank score
Inter norm
-1.250
normalised
Contacts
14
H-bonds 10
Strain ΔE
53.5 kcal/mol
SASA buried
80%
Lipo contact
85% BSA apolar/total
SASA unbound
569 Ų
Apolar buried
389 Ų

Interaction summary

HBD 4 HBA 1 HY 10 PI 1 CLASH 4

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.
Name9IFFContacts13
PoseOpen native poseHB0
IFP residues
ALA209 ARG74 ASN208 GLY214 GLY215 GLY85 LEU73 LYS211 MET70 PHE83 PRO212 PRO213 VAL88
Current overlap8Native recall0.62
Jaccard0.42RMSD-
HB strict0Strict recall-
HB same residue+role0HB role recall-
HB same residue0HB residue recall-

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

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
318 2.336576632518359 -1.21106 -28.0515 9 14 0 0.00 - - no Open
335 2.422189659188106 -1.24985 -29.7245 10 14 8 0.62 - - no Current
213 3.5127554901951803 -0.993582 -23.8904 7 17 0 0.00 - - no Open
185 3.5238914791246962 -1.40698 -33.5313 9 20 0 0.00 - - no Open
147 3.669644269089665 -1.11617 -26.0864 9 19 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 -29.724kcal/mol
Ligand efficiency (LE) -1.2385kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -11.100
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 24HA

Physicochemical properties

Molecular weight 321.4Da
Lipinski: ≤ 500 Da
LogP (cLogP) 1.11
Lipinski: ≤ 5
Rotatable bonds 5

Conformational strain (MMFF94s)

Strain energy (ΔE) 53.48kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 141.28kcal/mol
Minimised FF energy 87.81kcal/mol

SASA & burial

✓ computed
SASA (unbound) 568.9Ų
Total solvent-accessible surface area of free ligand
BSA total 456.4Ų
Buried surface area upon binding
BSA apolar 388.8Ų
Hydrophobic contacts buried
BSA polar 67.7Ų
Polar contacts buried
Fraction buried 80.2%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 85.2%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -2966.2Ų
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 4005.2Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1515.1Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)