FAIRMol

CKP-28

Pose ID 11812 Compound 2649 Pose 291

DB SELECTIONDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T18
T. brucei TR (Mepacrine binding site (MBS, site 1)) T. brucei Mepacrine binding site (MBS, site 1)
Ligand CKP-28
PDB6RB5

3D complex viewer

Strict H-bonds Permissive H-bonds
Viewer legend
Protein receptor
Pocket residues
Cofactor context
Docked ligand
Overall assessment
Promising SASA cached
Promising and worth follow-up
Binding strong Geometry high Native strong SASA done
Strain ΔE
9.7 kcal/mol
Protein clashes
1
Internal clashes
1
Native overlap
contact recall 0.62, Jaccard 0.42
Burial
74%
Hydrophobic fit
95%
Reason: no major geometry red flags detected
1 protein-contact clashes
Molecular report
Full metrics ↗
Promising Reasonable quality metrics. Warrants further investigation.
✓ Excellent LE (-0.910 kcal/mol/HA) ✓ Good fit quality (FQ -8.03) ✓ Strong H-bond network (6 bonds) ✓ Deep burial (74% SASA buried) ✓ Lipophilic contacts well-matched (95%) ✗ Moderate strain (9.7 kcal/mol) ✗ Geometry warnings ✗ Minor protein-contact clashes (3) ✗ Internal clashes (9)
Score
-20.927
kcal/mol
LE
-0.910
kcal/mol/HA
Fit Quality
-8.03
FQ (Leeson)
HAC
23
heavy atoms
MW
300
Da
LogP
3.75
cLogP
Strain ΔE
9.7 kcal/mol
SASA buried
74%
Lipo contact
95% BSA apolar/total
SASA unbound
570 Ų
Apolar buried
401 Ų

Interaction summary

HB 6 HY 24 PI 4 CLASH 1
Final rank0.590Score-20.927
Inter norm-0.955Intra norm0.046
Top1000noExcludedno
Contacts14H-bonds6
Artifact reasongeometry warning; 9 clashes; 3 protein contact clashes
Residues
CYS52 GLU18 GLY13 GLY49 GLY50 ILE339 LEU17 MET113 SER14 THR335 TRP21 TYR110 VAL53 VAL58

Protein summary

493 residues
Protein targetT18Atoms7550
Residues493Chains1
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:276; 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

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
Name6RB5Contacts13
PoseOpen native poseHB0
IFP residues
ASP116 GLU18 GLY112 ILE106 LEU17 MET113 SER109 THR117 THR335 TRP21 TYR110 VAL53 VAL58
Current overlap8Native recall0.62
Jaccard0.42RMSD-
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

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
276 -0.13976627593331645 -1.47676 -33.8684 7 13 0 0.00 - - no Open
266 -0.1272805151622386 -1.43749 -33.0386 7 13 0 0.00 - - no Open
291 0.5901992826957818 -0.955457 -20.9268 6 14 8 0.62 - - no Current
270 0.7471206776409113 -1.09931 -23.5478 2 19 0 0.00 - - no Open
316 1.8816462000984255 -1.05627 -24.1642 4 14 0 0.00 - - no Open
212 2.886404467202735 -1.21041 -25.7311 5 21 0 0.00 - - no Open
366 3.3581943353758192 -0.985005 -21.6018 5 15 0 0.00 - - no Open
264 5.09030891194505 -1.02523 -22.5298 4 16 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 -20.927kcal/mol
Ligand efficiency (LE) -0.9099kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -8.030
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 23HA

Physicochemical properties

Molecular weight 300.4Da
Lipinski: ≤ 500 Da
LogP (cLogP) 3.75
Lipinski: ≤ 5
Rotatable bonds 4

Conformational strain (MMFF94s)

Strain energy (ΔE) 9.71kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 59.45kcal/mol
Minimised FF energy 49.74kcal/mol

SASA & burial

✓ computed
SASA (unbound) 570.2Ų
Total solvent-accessible surface area of free ligand
BSA total 423.6Ų
Buried surface area upon binding
BSA apolar 400.8Ų
Hydrophobic contacts buried
BSA polar 22.8Ų
Polar contacts buried
Fraction buried 74.3%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 94.6%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -3153.6Ų
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 4076.6Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 1470.4Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)