FAIRMol

MK3

Pose ID 4310 Compound 700 Pose 247

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 MK3
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
61.9 kcal/mol
Protein clashes
2
Internal clashes
2
Native overlap
contact recall 0.79, Jaccard 0.71, H-bond role recall 0.20
Burial
76%
Hydrophobic fit
88%
Reason: strain 61.9 kcal/mol
strain ΔE 61.9 kcal/mol 2 protein-contact clashes
Molecular report
Full metrics ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Excellent LE (-0.723 kcal/mol/HA) ✓ Good fit quality (FQ -7.34) ✓ Good H-bonds (4 bonds) ✓ Deep burial (76% SASA buried) ✓ Lipophilic contacts well-matched (88%) ✗ Extreme strain energy (61.9 kcal/mol) ✗ Geometry warnings ✗ Minor protein-contact clashes (3) ✗ Many internal clashes (12)
Score
-26.011
kcal/mol
LE
-0.723
kcal/mol/HA
Fit Quality
-7.34
FQ (Leeson)
HAC
36
heavy atoms
MW
499
Da
LogP
1.32
cLogP
Strain ΔE
61.9 kcal/mol
SASA buried
76%
Lipo contact
88% BSA apolar/total
SASA unbound
863 Ų
Apolar buried
570 Ų

Interaction summary

HB 4 HY 24 PI 2 CLASH 2

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 rank0.884Score-26.011
Inter norm-1.053Intra norm0.330
Top1000noExcludedno
Contacts17H-bonds4
Artifact reasongeometry warning; 12 clashes; 3 protein contact clashes; 1 cofactor-context clash; high strain Δ 61.9
Residues
ALA96 ARG14 ASP161 CYS168 LEU208 LEU209 LYS114 MET213 NAP301 PHE171 PHE97 PRO210 PRO99 TRP221 TYR174 TYR98 VAL206

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 overlap15Native recall0.79
Jaccard0.71RMSD-
HB strict2Strict recall0.33
HB same residue+role1HB role recall0.20
HB same residue1HB residue recall0.20

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

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
297 0.7133550270525915 -0.900154 -28.1429 2 21 0 0.00 0.00 - no Open
247 0.8841488795399569 -1.05271 -26.0105 4 17 15 0.79 0.20 - no Current
293 3.831697810407351 -0.521837 -15.2673 6 15 0 0.00 0.00 - no Open
254 4.856409708403751 -0.731116 -19.4621 9 18 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 -26.011kcal/mol
Ligand efficiency (LE) -0.7225kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -7.343
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 36HA

Physicochemical properties

Molecular weight 498.6Da
Lipinski: ≤ 500 Da
LogP (cLogP) 1.32
Lipinski: ≤ 5
Rotatable bonds 11

Conformational strain (MMFF94s)

Strain energy (ΔE) 61.92kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 90.55kcal/mol
Minimised FF energy 28.63kcal/mol

SASA & burial

✓ computed
SASA (unbound) 862.6Ų
Total solvent-accessible surface area of free ligand
BSA total 651.7Ų
Buried surface area upon binding
BSA apolar 570.1Ų
Hydrophobic contacts buried
BSA polar 81.7Ų
Polar contacts buried
Fraction buried 75.6%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 87.5%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -1843.8Ų
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 939.7Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)