FAIRMol

MK2

Pose ID 4309 Compound 758 Pose 246

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 MK2
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
Likely artefact or unreliable pose
Binding strong Geometry medium Native strong SASA done
Strain ΔE
33.1 kcal/mol
Protein clashes
3
Internal clashes
3
Native overlap
contact recall 0.68, Jaccard 0.59, H-bond role recall 0.20
Burial
80%
Hydrophobic fit
84%
Reason: no major geometry red flags detected
3 protein-contact clashes 3 intramolecular clashes
Molecular report
Full metrics ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Excellent LE (-0.818 kcal/mol/HA) ✓ Good fit quality (FQ -8.12) ✓ Strong H-bond network (6 bonds) ✓ Deep burial (80% SASA buried) ✓ Lipophilic contacts well-matched (84%) ✗ Very high strain energy (33.1 kcal/mol) ✗ Geometry warnings ✗ Protein-contact clashes (6) ✗ Many internal clashes (15)
Score
-27.005
kcal/mol
LE
-0.818
kcal/mol/HA
Fit Quality
-8.12
FQ (Leeson)
HAC
33
heavy atoms
MW
455
Da
LogP
2.76
cLogP
Strain ΔE
33.1 kcal/mol
SASA buried
80%
Lipo contact
84% BSA apolar/total
SASA unbound
745 Ų
Apolar buried
498 Ų

Interaction summary

HB 6 HY 24 PI 1 CLASH 3
Final rank1.578Score-27.005
Inter norm-1.023Intra norm0.205
Top1000noExcludedno
Contacts16H-bonds6
Artifact reasongeometry warning; 15 clashes; 6 protein contact clashes; 1 cofactor-context clash; high strain Δ 33.1
Residues
ALA212 ARG14 ASP161 CYS168 GLU217 GLY214 LEU208 LEU209 MET213 NAP301 PHE171 PHE97 PRO210 TRP221 TYR174 VAL206

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 overlap13Native recall0.68
Jaccard0.59RMSD-
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
296 1.2094497069229952 -0.798718 -24.0361 4 19 0 0.00 0.00 - no Open
246 1.5777109956035995 -1.02348 -27.0051 6 16 13 0.68 0.20 - no Current
217 2.907166553436376 -0.828931 -26.0142 6 18 0 0.00 0.00 - no Open
272 2.937604839504376 -0.709141 -16.628 8 14 0 0.00 0.00 - no Open
264 3.3766176770969594 -0.963848 -30.2461 8 16 0 0.00 0.00 - no Open
195 3.764082353800593 -0.885488 -30.0305 8 20 0 0.00 0.00 - no Open
253 5.228683162267013 -0.827143 -20.3337 9 19 0 0.00 0.00 - no Open
235 5.457047523773753 -0.802528 -20.4234 6 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 -27.005kcal/mol
Ligand efficiency (LE) -0.8183kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -8.119
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 33HA

Physicochemical properties

Molecular weight 454.5Da
Lipinski: ≤ 500 Da
LogP (cLogP) 2.76
Lipinski: ≤ 5
Rotatable bonds 9

Conformational strain (MMFF94s)

Strain energy (ΔE) 33.15kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 56.07kcal/mol
Minimised FF energy 22.92kcal/mol

SASA & burial

✓ computed
SASA (unbound) 744.6Ų
Total solvent-accessible surface area of free ligand
BSA total 592.0Ų
Buried surface area upon binding
BSA apolar 497.5Ų
Hydrophobic contacts buried
BSA polar 94.5Ų
Polar contacts buried
Fraction buried 79.5%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 84.0%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -1737.2Ų
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 931.6Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)