FAIRMol

MK170

Pose ID 13835 Compound 1101 Pose 277

DB fairmolDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T21
T. cruzi R5P T. cruzi
Ligand MK170
PDB3K7O

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
43.3 kcal/mol
Protein clashes
2
Internal clashes
2
Native overlap
contact recall 0.93, Jaccard 0.76, H-bond role recall 0.44
Burial
80%
Hydrophobic fit
75%
Reason: strain 43.3 kcal/mol
strain ΔE 43.3 kcal/mol 2 protein-contact clashes
Molecular report
Full metrics ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Excellent LE (-1.022 kcal/mol/HA) ✓ Good fit quality (FQ -9.65) ✓ Strong H-bond network (10 bonds) ✓ Deep burial (80% SASA buried) ✓ Lipophilic contacts well-matched (75%) ✗ Extreme strain energy (43.3 kcal/mol) ✗ Geometry warnings ✗ Many internal clashes (10)
Score
-28.617
kcal/mol
LE
-1.022
kcal/mol/HA
Fit Quality
-9.65
FQ (Leeson)
HAC
28
heavy atoms
MW
379
Da
LogP
0.85
cLogP
Strain ΔE
43.3 kcal/mol
SASA buried
80%
Lipo contact
75% BSA apolar/total
SASA unbound
598 Ų
Apolar buried
359 Ų

Interaction summary

HB 10 HY 7 PI 3 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 rank2.609Score-28.617
Inter norm-0.948Intra norm-0.074
Top1000noExcludedno
Contacts16H-bonds10
Artifact reasongeometry warning; 10 clashes; 1 protein clash; high strain Δ 43.3
Residues
ARG137 ARG141 ASN103 HIS102 MET98 TYR94 ARG113 ASP10 CYS69 GLY70 GLY74 HIS11 ILE73 PRO12 SER71 TYR46

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
Name3K7OContacts14
PoseOpen native poseHB0
IFP residues
ARG137 ARG141 ASN103 HIS102 HIS138 ASP10 CYS69 GLY70 GLY74 HIS11 ILE73 PRO12 SER71 TYR46
Current overlap13Native recall0.93
Jaccard0.76RMSD-
HB strict6Strict recall0.50
HB same residue+role4HB role recall0.44
HB same residue4HB residue recall0.50

Protein summary

305 residues
Protein targetT21Atoms4646
Residues305Chains2
Residue summaryARG:576; ILE:532; VAL:512; GLU:420; ALA:360; PHE:240; HIS:238; LYS:220; THR:210; LEU:190; PRO:168; TYR:168; GLY:154; SER:154; ASP:144; ASN:112

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
316 1.1869142613642523 -1.07113 -28.1372 5 15 0 0.00 0.00 - no Open
300 2.086409757410631 -0.825961 -25.8618 5 12 0 0.00 0.00 - no Open
277 2.609458998065304 -0.94793 -28.6168 10 16 13 0.93 0.44 - no Current
195 3.179527375259222 -0.995655 -31.1449 9 14 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 -28.617kcal/mol
Ligand efficiency (LE) -1.0220kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -9.648
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 28HA

Physicochemical properties

Molecular weight 379.4Da
Lipinski: ≤ 500 Da
LogP (cLogP) 0.85
Lipinski: ≤ 5
Rotatable bonds 4

Conformational strain (MMFF94s)

Strain energy (ΔE) 43.27kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 133.44kcal/mol
Minimised FF energy 90.17kcal/mol

SASA & burial

✓ computed
SASA (unbound) 597.6Ų
Total solvent-accessible surface area of free ligand
BSA total 480.4Ų
Buried surface area upon binding
BSA apolar 359.2Ų
Hydrophobic contacts buried
BSA polar 121.2Ų
Polar contacts buried
Fraction buried 80.4%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 74.8%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -2190.8Ų
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 2482.0Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 744.1Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)