FAIRMol

CKP-28

Pose ID 4339 Compound 2649 Pose 276

DB SELECTIONDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T07
T. brucei PTR1 T. brucei
Ligand CKP-28
PDB6RX6

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
11.3 kcal/mol
Protein clashes
1
Internal clashes
2
Native overlap
contact recall 0.63, Jaccard 0.60, H-bond role recall 0.40
Burial
89%
Hydrophobic fit
96%
Reason: no major geometry red flags detected
1 protein-contact clashes
Molecular report
Full metrics ↗
Promising Reasonable quality metrics. Warrants further investigation.
✓ Excellent LE (-1.472 kcal/mol/HA) ✓ Good fit quality (FQ -13.00) ✓ Strong H-bond network (7 bonds) ✓ Deep burial (89% SASA buried) ✓ Lipophilic contacts well-matched (96%) ✗ Moderate strain (11.3 kcal/mol) ✗ Geometry warnings ✗ Minor protein-contact clashes (2) ✗ Internal clashes (9)
Score
-33.868
kcal/mol
LE
-1.472
kcal/mol/HA
Fit Quality
-13.00
FQ (Leeson)
HAC
23
heavy atoms
MW
300
Da
LogP
3.75
cLogP
Strain ΔE
11.3 kcal/mol
SASA buried
89%
Lipo contact
96% BSA apolar/total
SASA unbound
556 Ų
Apolar buried
473 Ų

Interaction summary

HB 7 HY 24 PI 5 CLASH 2
Final rank-0.140Score-33.868
Inter norm-1.477Intra norm0.004
Top1000noExcludedno
Contacts13H-bonds7
Artifact reasongeometry warning; 9 clashes; 2 protein contact clashes; 3 cofactor-context clashes
Residues
ARG14 CYS168 GLU217 LEU208 LEU209 MET213 NAP301 PHE171 PHE97 PRO210 SER95 TRP221 TYR174

Protein summary

275 residues
Protein targetT07Atoms3932
Residues275Chains3
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 overlap12Native recall0.63
Jaccard0.60RMSD-
HB strict3Strict recall0.50
HB same residue+role2HB role recall0.40
HB same residue2HB residue recall0.40

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 12 0.63 0.40 - no Current
266 -0.1272805151622386 -1.43749 -33.0386 7 13 12 0.63 0.40 - no Open
291 0.5901992826957818 -0.955457 -20.9268 6 14 0 0.00 0.00 - no Open
270 0.7471206776409113 -1.09931 -23.5478 2 19 0 0.00 0.00 - no Open
316 1.8816462000984255 -1.05627 -24.1642 4 14 0 0.00 0.00 - no Open
212 2.886404467202735 -1.21041 -25.7311 5 21 0 0.00 0.00 - no Open
366 3.3581943353758192 -0.985005 -21.6018 5 15 0 0.00 0.00 - no Open
264 5.09030891194505 -1.02523 -22.5298 4 16 0 0.00 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 -33.868kcal/mol
Ligand efficiency (LE) -1.4725kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -12.996
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) 11.27kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 61.01kcal/mol
Minimised FF energy 49.74kcal/mol

SASA & burial

✓ computed
SASA (unbound) 556.1Ų
Total solvent-accessible surface area of free ligand
BSA total 494.5Ų
Buried surface area upon binding
BSA apolar 473.1Ų
Hydrophobic contacts buried
BSA polar 21.3Ų
Polar contacts buried
Fraction buried 88.9%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 95.7%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -1662.8Ų
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 923.4Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)