FAIRMol

MK138

Pose ID 4316 Compound 1329 Pose 253

DB fairmolDocking 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 MK138
PDB6RX6

3D complex viewer

Strict H-bonds Permissive H-bonds
Viewer legend
Protein receptor
Pocket residues
Cofactor context
Docked ligand
Overall assessment
Weak SASA cached
Weak or marginal quality
Binding strong Geometry medium Native strong SASA done
Strain ΔE
13.9 kcal/mol
Protein clashes
2
Internal clashes
3
Native overlap
contact recall 0.84, Jaccard 0.84, H-bond role recall 0.40
Burial
82%
Hydrophobic fit
89%
Reason: no major geometry red flags detected
2 protein-contact clashes 3 intramolecular clashes
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-0.902 kcal/mol/HA) ✓ Good fit quality (FQ -8.70) ✓ Good H-bonds (4 bonds) ✓ Deep burial (82% SASA buried) ✓ Lipophilic contacts well-matched (89%) ✗ Moderate strain (13.9 kcal/mol) ✗ Geometry warnings ✗ Minor protein-contact clashes (3) ✗ Many internal clashes (12)
Score
-27.068
kcal/mol
LE
-0.902
kcal/mol/HA
Fit Quality
-8.70
FQ (Leeson)
HAC
30
heavy atoms
MW
411
Da
LogP
5.41
cLogP
Strain ΔE
13.9 kcal/mol
SASA buried
82%
Lipo contact
89% BSA apolar/total
SASA unbound
675 Ų
Apolar buried
494 Ų

Interaction summary

HB 4 HY 24 PI 3 CLASH 3

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 rank0.936Score-27.068
Inter norm-1.004Intra norm0.101
Top1000noExcludedno
Contacts16H-bonds4
Artifact reasongeometry warning; 12 clashes; 3 protein contact clashes; 2 cofactor-context clashes
Residues
ARG14 ASP161 CYS168 LEU208 LEU209 LYS178 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 overlap16Native recall0.84
Jaccard0.84RMSD-
HB strict1Strict recall0.17
HB same residue+role2HB role recall0.40
HB same residue2HB residue recall0.40

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
253 0.9363688971306743 -1.0035 -27.0679 4 16 16 0.84 0.40 - no Current
307 2.7338289268717797 -0.926291 -22.331 4 17 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 -27.068kcal/mol
Ligand efficiency (LE) -0.9023kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -8.704
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 30HA

Physicochemical properties

Molecular weight 411.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 5.41
Lipinski: ≤ 5
Rotatable bonds 6

Conformational strain (MMFF94s)

Strain energy (ΔE) 13.87kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 57.80kcal/mol
Minimised FF energy 43.93kcal/mol

SASA & burial

✓ computed
SASA (unbound) 674.8Ų
Total solvent-accessible surface area of free ligand
BSA total 554.0Ų
Buried surface area upon binding
BSA apolar 493.9Ų
Hydrophobic contacts buried
BSA polar 60.0Ų
Polar contacts buried
Fraction buried 82.1%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 89.2%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -1685.4Ų
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 961.0Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)