FAIRMol

MK217

Pose ID 4334 Compound 892 Pose 271

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 MK217
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 high Native strong SASA done
Strain ΔE
25.2 kcal/mol
Protein clashes
1
Internal clashes
1
Native overlap
contact recall 0.74, Jaccard 0.61, H-bond role recall 0.20
Burial
87%
Hydrophobic fit
81%
Reason: no major geometry red flags detected
1 protein-contact clashes
Molecular report
Full metrics ↗
Weak Marginal quality. Consider only alongside better-scoring alternatives.
✓ Excellent LE (-1.212 kcal/mol/HA) ✓ Good fit quality (FQ -11.69) ✓ Strong H-bond network (7 bonds) ✓ Deep burial (87% SASA buried) ✓ Lipophilic contacts well-matched (81%) ✗ High strain energy (25.2 kcal/mol) ✗ Geometry warnings ✗ Minor protein-contact clashes (2) ✗ Many internal clashes (12)
Score
-36.348
kcal/mol
LE
-1.212
kcal/mol/HA
Fit Quality
-11.69
FQ (Leeson)
HAC
30
heavy atoms
MW
427
Da
LogP
4.61
cLogP
Strain ΔE
25.2 kcal/mol
SASA buried
87%
Lipo contact
81% BSA apolar/total
SASA unbound
696 Ų
Apolar buried
494 Ų

Interaction summary

HB 7 HY 24 PI 5 CLASH 1
Final rank0.333Score-36.348
Inter norm-1.343Intra norm0.131
Top1000noExcludedno
Contacts18H-bonds7
Artifact reasongeometry warning; 12 clashes; 2 protein contact clashes; 1 cofactor-context clash; moderate strain Δ 25.2
Residues
ARG14 ASP161 CYS168 GLU217 GLY205 LEU208 LEU209 LYS220 MET169 MET213 NAP301 PHE171 PHE97 PRO210 TRP221 TYR174 VAL206 HIS267

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 overlap14Native recall0.74
Jaccard0.61RMSD-
HB strict2Strict recall0.33
HB same residue+role1HB role recall0.20
HB same residue1HB residue recall0.20

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
271 0.33329873631733 -1.34281 -36.348 7 18 14 0.74 0.20 - no Current
258 1.3392324839671519 -0.81043 -19.2443 4 18 0 0.00 0.00 - no Open
264 1.5746756141716811 -1.21355 -30.9473 7 16 16 0.84 0.40 - no Open
265 1.6344119354406168 -0.951662 -25.7152 6 12 0 0.00 0.00 - no Open
246 1.983765066084416 -1.07479 -29.1429 4 17 0 0.00 0.00 - no Open
328 2.1144353827617395 -0.854583 -25.3471 2 17 0 0.00 0.00 - no Open
287 2.915809060586571 -1.02101 -25.5206 12 18 0 0.00 0.00 - no Open
311 4.111083386289892 -0.863187 -20.0163 8 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 -36.348kcal/mol
Ligand efficiency (LE) -1.2116kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -11.687
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 30HA

Physicochemical properties

Molecular weight 426.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 4.61
Lipinski: ≤ 5
Rotatable bonds 7

Conformational strain (MMFF94s)

Strain energy (ΔE) 25.22kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 59.21kcal/mol
Minimised FF energy 33.99kcal/mol

SASA & burial

✓ computed
SASA (unbound) 695.9Ų
Total solvent-accessible surface area of free ligand
BSA total 607.5Ų
Buried surface area upon binding
BSA apolar 494.2Ų
Hydrophobic contacts buried
BSA polar 113.3Ų
Polar contacts buried
Fraction buried 87.3%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 81.4%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -1700.4Ų
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 921.1Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)