FAIRMol

MK61

Pose ID 325 Compound 216 Pose 325

DB fairmolDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T01
Human DHFR Human
Ligand MK61
PDB5SD8

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
43.9 kcal/mol
Protein clashes
3
Internal clashes
16
Native overlap
contact recall 0.67, Jaccard 0.58, H-bond role recall 0.00
Burial
82%
Hydrophobic fit
86%
Reason: 16 internal clashes, strain 43.9 kcal/mol
strain ΔE 43.9 kcal/mol 3 protein-contact clashes 16 intramolecular clashes
Molecular report
Full metrics ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Excellent LE (-0.641 kcal/mol/HA) ✓ Good fit quality (FQ -6.51) ✓ Good H-bonds (3 bonds) ✓ Deep burial (82% SASA buried) ✓ Lipophilic contacts well-matched (86%) ✗ Extreme strain energy (43.9 kcal/mol) ✗ Geometry warnings ✗ Minor protein-contact clashes (3) ✗ Many internal clashes (16)
Score
-23.077
kcal/mol
LE
-0.641
kcal/mol/HA
Fit Quality
-6.51
FQ (Leeson)
HAC
36
heavy atoms
MW
495
Da
LogP
3.93
cLogP
Strain ΔE
43.9 kcal/mol
SASA buried
82%
Lipo contact
86% BSA apolar/total
SASA unbound
798 Ų
Apolar buried
563 Ų

Interaction summary

HB 3 HY 24 PI 1 CLASH 0

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

No clash · clashes detected for this pose.
Final rank1.562Score-23.077
Inter norm-0.793Intra norm0.152
Top1000noExcludedno
Contacts17H-bonds3
Artifact reasongeometry warning; 16 clashes; 3 protein contact clashes; high strain Δ 43.9
Residues
ARG29 ASN65 ASP22 ILE61 ILE8 LEU23 LEU28 NAP201 PHE32 PHE35 PRO27 PRO62 SER60 THR57 TYR122 VAL116 VAL9

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
Name5SD8Contacts21
PoseOpen native poseHB0
IFP residues
ALA10 ASN65 ASP22 GLN36 GLU31 GLY117 GLY21 ILE61 ILE8 LEU23 LEU68 NAP201 PHE32 PHE35 PRO62 SER60 THR137 THR57 TYR122 VAL116 VAL9
Current overlap14Native recall0.67
Jaccard0.58RMSD-
HB strict0Strict recall0.00
HB same residue+role0HB role recall0.00
HB same residue0HB residue recall0.00

Protein summary

200 residues
Protein targetT01Atoms3128
Residues200Chains2
Residue summaryLYS:374; LEU:361; GLU:240; VAL:224; ARG:192; PHE:180; ILE:171; PRO:168; ASN:140; SER:132; TYR:126; GLN:119; ASP:108; MET:102; THR:98; GLY:91

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:NAP201

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
325 1.561969002170017 -0.793093 -23.077 3 17 14 0.67 0.00 - no Current
304 3.241245520989114 -0.81948 -28.9361 5 20 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 -23.077kcal/mol
Ligand efficiency (LE) -0.6410kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -6.515
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 36HA

Physicochemical properties

Molecular weight 494.6Da
Lipinski: ≤ 500 Da
LogP (cLogP) 3.93
Lipinski: ≤ 5
Rotatable bonds 6

Conformational strain (MMFF94s)

Strain energy (ΔE) 43.94kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 173.84kcal/mol
Minimised FF energy 129.90kcal/mol

SASA & burial

✓ computed
SASA (unbound) 798.0Ų
Total solvent-accessible surface area of free ligand
BSA total 656.2Ų
Buried surface area upon binding
BSA apolar 563.4Ų
Hydrophobic contacts buried
BSA polar 92.8Ų
Polar contacts buried
Fraction buried 82.2%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 85.9%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -1760.6Ų
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 1677.9Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 606.6Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)