FAIRMol

MK178

Pose ID 4998 Compound 1245 Pose 257

DB fairmolDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T08
T. brucei PTR1 T. brucei
Ligand MK178
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
54.4 kcal/mol
Protein clashes
1
Internal clashes
2
Native overlap
contact recall 0.79, Jaccard 0.65, H-bond role recall 0.20
Burial
98%
Hydrophobic fit
72%
Reason: strain 54.4 kcal/mol
strain ΔE 54.4 kcal/mol 1 protein-contact clashes
Molecular report
Full metrics ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Excellent LE (-1.126 kcal/mol/HA) ✓ Good fit quality (FQ -10.51) ✓ Good H-bonds (3 bonds) ✓ Deep burial (98% SASA buried) ✓ Lipophilic contacts well-matched (72%) ✗ Extreme strain energy (54.4 kcal/mol) ✗ Geometry warnings ✗ Minor protein-contact clashes (2) ✗ Many internal clashes (11)
Score
-30.406
kcal/mol
LE
-1.126
kcal/mol/HA
Fit Quality
-10.51
FQ (Leeson)
HAC
27
heavy atoms
MW
384
Da
LogP
-0.23
cLogP
Strain ΔE
54.4 kcal/mol
SASA buried
98%
Lipo contact
72% BSA apolar/total
SASA unbound
593 Ų
Apolar buried
417 Ų

Interaction summary

HB 3 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 rank0.401Score-30.406
Inter norm-1.249Intra norm0.123
Top1000noExcludedno
Contacts19H-bonds3
Artifact reasongeometry warning; 11 clashes; 2 protein contact clashes; 2 cofactor-context clashes; high strain Δ 54.4
Residues
ARG14 ASN175 ASP161 CYS168 GLY205 LEU208 LEU209 MET163 MET213 NAP301 PHE171 PHE97 PRO167 PRO210 SER207 TRP221 TYR174 VAL164 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
Jaccard0.65RMSD-
HB strict1Strict recall0.17
HB same residue+role1HB role recall0.20
HB same residue3HB residue recall0.60

Protein summary

258 residues
Protein targetT08Atoms3881
Residues258Chains2
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
257 0.4011332948469937 -1.24877 -30.4063 3 19 15 0.79 0.20 - no Current
251 0.7112098443834395 -0.942986 -19.0186 3 16 0 0.00 0.00 - no Open
360 1.143412050685196 -0.90019 -21.6461 5 15 0 0.00 0.00 - no Open
317 2.1564064725732535 -1.03355 -25.1287 8 15 0 0.00 0.00 - no Open
260 2.4809595684265946 -1.00326 -27.3155 3 13 0 0.00 0.00 - no Open
280 2.986032798063189 -0.883222 -24.6464 5 14 0 0.00 0.00 - no Open
234 3.2589755731920693 -1.0482 -25.1368 8 17 0 0.00 0.00 - no Open
223 3.6714800169018886 -1.23796 -31.5102 12 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 -30.406kcal/mol
Ligand efficiency (LE) -1.1262kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -10.507
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 27HA

Physicochemical properties

Molecular weight 384.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) -0.23
Lipinski: ≤ 5
Rotatable bonds 6

Conformational strain (MMFF94s)

Strain energy (ΔE) 54.41kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 89.09kcal/mol
Minimised FF energy 34.68kcal/mol

SASA & burial

✓ computed
SASA (unbound) 593.0Ų
Total solvent-accessible surface area of free ligand
BSA total 582.6Ų
Buried surface area upon binding
BSA apolar 417.1Ų
Hydrophobic contacts buried
BSA polar 165.4Ų
Polar contacts buried
Fraction buried 98.2%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 71.6%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -1561.9Ų
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 915.4Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)