FAIRMol

ulfkktlib_2520

Pose ID 4964 Compound 3016 Pose 223

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_2520
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
55.9 kcal/mol
Protein clashes
1
Internal clashes
1
Native overlap
contact recall 0.68, Jaccard 0.59, H-bond role recall 0.40
Burial
90%
Hydrophobic fit
80%
Reason: strain 55.9 kcal/mol
strain ΔE 55.9 kcal/mol 1 protein-contact clashes
Molecular report
Full metrics ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Excellent LE (-0.991 kcal/mol/HA) ✓ Good fit quality (FQ -9.36) ✓ Strong H-bond network (8 bonds) ✓ Deep burial (90% SASA buried) ✓ Lipophilic contacts well-matched (80%) ✗ Extreme strain energy (55.9 kcal/mol) ✗ Geometry warnings ✗ Minor protein-contact clashes (3) ✗ Many internal clashes (12)
Score
-27.754
kcal/mol
LE
-0.991
kcal/mol/HA
Fit Quality
-9.36
FQ (Leeson)
HAC
28
heavy atoms
MW
384
Da
LogP
3.78
cLogP
Strain ΔE
55.9 kcal/mol
SASA buried
90%
Lipo contact
80% BSA apolar/total
SASA unbound
660 Ų
Apolar buried
477 Ų

Interaction summary

HB 8 HY 19 PI 3 CLASH 1
Final rank0.696Score-27.754
Inter norm-1.151Intra norm0.160
Top1000noExcludedno
Contacts16H-bonds8
Artifact reasongeometry warning; 12 clashes; 3 protein contact clashes; 4 cofactor-context clashes; high strain Δ 55.9
Residues
ARG14 ASP161 CYS168 GLY205 LEU208 LEU209 LEU263 MET163 NAP301 PHE97 PRO210 SER95 TRP221 TYR174 VAL206 VAL211

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

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 overlap13Native recall0.68
Jaccard0.59RMSD-
HB strict3Strict recall0.50
HB same residue+role2HB role recall0.40
HB same residue3HB residue recall0.60

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

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
222 0.6727948206638366 -1.18964 -27.3131 8 16 13 0.68 0.40 - no Open
223 0.6956753146015617 -1.15093 -27.754 8 16 13 0.68 0.40 - 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 -27.754kcal/mol
Ligand efficiency (LE) -0.9912kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -9.357
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 28HA

Physicochemical properties

Molecular weight 384.4Da
Lipinski: ≤ 500 Da
LogP (cLogP) 3.78
Lipinski: ≤ 5
Rotatable bonds 4

Conformational strain (MMFF94s)

Strain energy (ΔE) 55.86kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 36.24kcal/mol
Minimised FF energy -19.62kcal/mol

SASA & burial

✓ computed
SASA (unbound) 660.4Ų
Total solvent-accessible surface area of free ligand
BSA total 591.8Ų
Buried surface area upon binding
BSA apolar 476.6Ų
Hydrophobic contacts buried
BSA polar 115.2Ų
Polar contacts buried
Fraction buried 89.6%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 80.5%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -1664.4Ų
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 931.0Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)