FAIRMol

OSA_Lib_43

Pose ID 13681 Compound 5389 Pose 123

DB fairmolDocking pose analysis is being read from this database.
Molecular metrics status: done
RDKit SASA-based burial metrics are cached.
SASA cached
T21
T. cruzi R5P T. cruzi
Ligand OSA_Lib_43
PDB3K7O

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 high Native strong SASA done
Strain ΔE
29.1 kcal/mol
Protein clashes
1
Internal clashes
1
Native overlap
contact recall 0.86, Jaccard 0.67, H-bond role recall 0.44
Burial
69%
Hydrophobic fit
90%
Reason: no major geometry red flags detected
1 protein-contact clashes
Molecular report
Full metrics ↗
Reject Multiple quality flags — this pose should be deprioritised or discarded.
✓ Excellent LE (-0.640 kcal/mol/HA) ✓ Good fit quality (FQ -6.51) ✓ Strong H-bond network (6 bonds) ✓ Deep burial (69% SASA buried) ✓ Lipophilic contacts well-matched (90%) ✗ High strain energy (29.1 kcal/mol) ✗ Geometry warnings ✗ Protein-contact clashes (5) ✗ Many internal clashes (17)
Score
-23.049
kcal/mol
LE
-0.640
kcal/mol/HA
Fit Quality
-6.51
FQ (Leeson)
HAC
36
heavy atoms
MW
491
Da
LogP
1.74
cLogP
Strain ΔE
29.1 kcal/mol
SASA buried
69%
Lipo contact
90% BSA apolar/total
SASA unbound
798 Ų
Apolar buried
494 Ų

Interaction summary

HB 6 HY 12 PI 1 CLASH 1

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 rank2.072Score-23.049
Inter norm-0.680Intra norm0.039
Top1000noExcludedno
Contacts16H-bonds6
Artifact reasongeometry warning; 17 clashes; 5 protein contact clashes; moderate strain Δ 29.1
Residues
ARG137 ARG141 ASN103 HIS102 TYR94 ALA41 ARG113 CYS69 GLY70 GLY72 GLY74 HIS11 ILE73 PRO12 SER71 TYR46

Native ligand reference

★ reference
Interaction fingerprint calculated directly from the uploaded native ligand without docking. Current H-bond mode: strict.
Name3K7OContacts14
PoseOpen native poseHB0
IFP residues
ARG137 ARG141 ASN103 HIS102 HIS138 ASP10 CYS69 GLY70 GLY74 HIS11 ILE73 PRO12 SER71 TYR46
Current overlap12Native recall0.86
Jaccard0.67RMSD-
HB strict4Strict recall0.33
HB same residue+role4HB role recall0.44
HB same residue5HB residue recall0.62

Protein summary

305 residues
Protein targetT21Atoms4646
Residues305Chains2
Residue summaryARG:576; ILE:532; VAL:512; GLU:420; ALA:360; PHE:240; HIS:238; LYS:220; THR:210; LEU:190; PRO:168; TYR:168; GLY:154; SER:154; ASP:144; ASN:112

All stored poses for this docking hit

PoseFinal rankInter normScoreHBCTCT overlapCT recallHB role rec.RMSDExcluded
123 2.072198771543227 -0.679749 -23.0492 6 16 12 0.86 0.44 - no Current

Molecular metrics

RDKit SASA burial, strain energy (MMFF94s), ligand efficiency and fit quality for this docking pose.
✓ Metrics available

Scoring & efficiency

Docking score -23.049kcal/mol
Ligand efficiency (LE) -0.6403kcal/mol/HA
Score / heavy atom count
Fit quality (FQ) -6.507
LE / (0.072 + 0.95/HAC) — Leeson & Springthorpe
Heavy atom count 36HA

Physicochemical properties

Molecular weight 490.7Da
Lipinski: ≤ 500 Da
LogP (cLogP) 1.74
Lipinski: ≤ 5
Rotatable bonds 7

Conformational strain (MMFF94s)

Strain energy (ΔE) 29.11kcal/mol
< 5 good · 5–10 marginal · > 10 problematic
Docked FF energy 146.97kcal/mol
Minimised FF energy 117.86kcal/mol

SASA & burial

✓ computed
SASA (unbound) 797.8Ų
Total solvent-accessible surface area of free ligand
BSA total 547.2Ų
Buried surface area upon binding
BSA apolar 494.2Ų
Hydrophobic contacts buried
BSA polar 53.0Ų
Polar contacts buried
Fraction buried 68.6%
> 60 % indicates good pocket engagement
Lipophilic contact ratio 90.3%
BSA apolar / BSA total — high = hydrophobic driver
Δ Non-polar SASA -2463.0Ų
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 2482.0Ų
Non-polar SASA of receptor alone (VdW proxy, nonpolar atoms only)
Complex non-polar SASA 763.8Ų
Non-polar SASA of full complex (VdW proxy, nonpolar atoms only)