FAIRMol

ulfkktlib_2308

Pose ID 4957 Compound 2809 Pose 216

DB SELECTIONDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T08
T. brucei PTR1 T. brucei
Ligand ulfkktlib_2308
PDB6RX6

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
45.5 kcal/mol
Protein clashes
0
Internal clashes
1
Native overlap
contact recall 0.42, Jaccard 0.35, H-bond role recall 0.60
Burial
99%
Hydrophobic fit
73%
Reason: strain 45.5 kcal/mol
strain ΔE 45.5 kcal/mol
Molecular report
Full metrics ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Excellent LE (-1.706 kcal/mol/HA) ✓ Good fit quality (FQ -13.67) ✓ Strong H-bond network (10 bonds) ✓ Deep burial (99% SASA buried) ✓ Lipophilic contacts well-matched (73%) ✗ Extreme strain energy (45.5 kcal/mol) ✗ Geometry warnings ✗ Internal clashes (5)
Score
-30.702
kcal/mol
LE
-1.706
kcal/mol/HA
Fit Quality
-13.67
FQ (Leeson)
HAC
18
heavy atoms
MW
250
Da
LogP
-0.64
cLogP
Strain ΔE
45.5 kcal/mol
SASA buried
99%
Lipo contact
73% BSA apolar/total
SASA unbound
481 Ų
Apolar buried
345 Ų

Interaction summary

HB 10 HY 18 PI 2 CLASH 1

HB · H-bonds

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

PI · π–π interactions

Native π–π recall is disabled because no explicit native π–π reference was stored.

HY · Hydrophobic contacts

CLASH · Clashes

Final rank0.679Score-30.702
Inter norm-1.763Intra norm0.057
Top1000noExcludedno
Contacts12H-bonds10
Artifact reasongeometry warning; 5 clashes; 1 protein clash; 1 severe cofactor-context clash; high strain Δ 45.5
Residues
ASN175 ASP161 CYS168 LYS178 MET163 NAP301 PHE171 PHE97 PRO167 TRP221 TYR174 VAL164

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
NameTbPTR1_cW_6RX6_ReadyContacts19
PoseOpen native poseHB0
IFP residues
ARG14 ASP161 CYS168 GLY205 LEU208 LEU209 LYS178 MET213 NAP301 PHE171 PHE97 PRO210 PRO99 SER207 SER95 TRP221 TYR174 TYR98 VAL206
Current overlap8Native recall0.42
Jaccard0.35RMSD-
HB strict2Strict recall0.33
HB same residue+role3HB role recall0.60
HB same residue3HB residue recall0.60

Protein summary

258 residues
Protein targetT08Atoms3881
Residues258Chains2
Residue summaryLEU:437; VAL:433; ALA:361; ARG:288; ILE:266; GLU:210; LYS:198; SER:198; ASN:182; THR:154; GLN:153; PHE:140; PRO:140; TYR:126; GLY:112; HIS:103

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:NAP301

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
216 0.6787572657010086 -1.76278 -30.7019 10 12 8 0.42 0.60 - no Current
185 1.0852781555874929 -1.74987 -30.4825 10 12 8 0.42 0.60 - 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 -30.702kcal/mol
Ligand efficiency (LE) -1.7057kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -13.670
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 18HA

Physicochemical properties

Molecular weight 250.2Da
Lipinski: ≤ 500 Da
LogP (cLogP) -0.64
Lipinski: ≤ 5
Rotatable bonds 4

Conformational strain (MMFF94s)

Strain energy (ΔE) 45.50kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 90.64kcal/mol
Minimised FF energy 45.14kcal/mol

SASA & burial

✓ computed
SASA (unbound) 480.9Ų
Total solvent-accessible surface area of free ligand
BSA total 474.1Ų
Buried surface area upon binding
BSA apolar 344.9Ų
Hydrophobic contacts buried
BSA polar 129.2Ų
Polar contacts buried
Fraction buried 98.6%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 72.8%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -1482.7Ų
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 2051.9Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 920.6Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)