{
  "report_format_version": "pepfold-report-v1",
  "generated_at": "2026-06-18T22:05:33.493Z",
  "specimen": {
    "number": 445,
    "sequence": "KRASHPGKSIEYRAAAIQQVAFATRCSVLDEKPELYEFGATQLSSAWTGSRRISSEP",
    "sequence_length": 57,
    "status": "complete",
    "wallet": "4UgHEB2Gm6Y4AEhdMUup3Q1DDCQvEYUVoLtdyivXBRLw",
    "amount_sol": 0,
    "tx_hash": "2FjvyRdxhcEiPKLtZx2brNpfc1eVKNkgsNZeUBBAeqLPYFp2zSHXdqdx6wS91THG82hfFTebBsnAgmW3w6NKABSL",
    "created_at": "2026-06-18T14:41:09.600035+00:00",
    "completed_at": "2026-06-18T14:48:55.072854+00:00"
  },
  "structure": {
    "pdb_url": "https://mrzziawbddodlpywncfy.supabase.co/storage/v1/object/public/pdb-files/8544fd22-2f40-4cd6-8f6f-7246c8b1d82a.pdb",
    "helix_pct": 0,
    "sheet_pct": 0,
    "loop_pct": 100
  },
  "triage": {
    "models": {
      "fold_model": {
        "name": "ESMFold",
        "version": "esmatlas-esmfold-v1"
      },
      "triage_model": {
        "name": "PEPFOLD heuristic triage",
        "version": "pepfold-triage-v1"
      },
      "comment_model": {
        "name": "Claude",
        "version": "claude-opus-4-7"
      }
    },
    "run_id": "run_82f465a2f43d4b2aa60778b92802a3e6",
    "metrics": [
      {
        "id": "fold_confidence",
        "label": "fold confidence",
        "value": 0.465,
        "source": {
          "model": "ESMFold",
          "version": "esmatlas-esmfold-v1"
        },
        "confidence": 0.52,
        "evidence_note": "derived from mean pLDDT on CA atoms",
        "confidence_band": [
          0.345,
          0.585
        ],
        "not_enough_confidence": true
      },
      {
        "id": "disorder_estimate",
        "label": "disorder estimate",
        "value": 1,
        "source": {
          "model": "PEPFOLD structure heuristic",
          "version": "pepfold-triage-v1"
        },
        "confidence": 0.52,
        "evidence_note": "estimated from loop proportion and low-confidence structure regions",
        "confidence_band": [
          0.88,
          1
        ],
        "not_enough_confidence": true
      },
      {
        "id": "aggregation_risk",
        "label": "aggregation risk",
        "value": 0.326,
        "source": {
          "model": "PEPFOLD developability heuristic",
          "version": "pepfold-triage-v1"
        },
        "confidence": 0.56,
        "evidence_note": "hydrophobic burden, aromatic burden, charge, and long hydrophobic runs",
        "confidence_band": [
          0.216,
          0.436
        ],
        "not_enough_confidence": false
      },
      {
        "id": "hydrophobic_burden",
        "label": "hydrophobic burden",
        "value": 0.368,
        "source": {
          "model": "PEPFOLD sequence analyzer",
          "version": "pepfold-triage-v1"
        },
        "confidence": 0.84,
        "evidence_note": "fraction of hydrophobic residues in sequence",
        "confidence_band": [
          0.328,
          0.408
        ],
        "not_enough_confidence": false
      },
      {
        "id": "charge_distribution_risk",
        "label": "charge distribution risk",
        "value": 0.035,
        "source": {
          "model": "PEPFOLD sequence analyzer",
          "version": "pepfold-triage-v1"
        },
        "confidence": 0.84,
        "evidence_note": "absolute net charge normalized by sequence length",
        "confidence_band": [
          0,
          0.075
        ],
        "not_enough_confidence": false
      },
      {
        "id": "solubility_risk",
        "label": "solubility risk",
        "value": 0.277,
        "source": {
          "model": "PEPFOLD developability heuristic",
          "version": "pepfold-triage-v1"
        },
        "confidence": 0.56,
        "evidence_note": "composite of aggregation risk, hydrophobic burden, and charge",
        "confidence_band": [
          0.167,
          0.387
        ],
        "not_enough_confidence": false
      },
      {
        "id": "developability_risk",
        "label": "developability risk",
        "value": 0.439,
        "source": {
          "model": "PEPFOLD developability heuristic",
          "version": "pepfold-triage-v1"
        },
        "confidence": 0.56,
        "evidence_note": "composite developability indicator used for triage",
        "confidence_band": [
          0.329,
          0.549
        ],
        "not_enough_confidence": false
      }
    ],
    "generated_at": "2026-06-18T14:47:34.816431+00:00",
    "report_version": "phase-a.v1",
    "sequence_length": 57,
    "synthesis_hints": [
      "sequence length >45 aa may reduce synthesis yield"
    ],
    "motif_liabilities": [],
    "developability_flags": [
      {
        "flag": "low_fold_confidence",
        "reason": "structure confidence is limited",
        "severity": "medium"
      },
      {
        "flag": "high_disorder_estimate",
        "reason": "predicted disorder is elevated",
        "severity": "medium"
      }
    ],
    "low_confidence_reasons": [
      "DSSP unavailable; secondary structure uses pLDDT fallback."
    ]
  },
  "audit": {
    "input": {
      "sequence_length": 57,
      "sequence_sha256": "1fb0714762bbf1dd408d9c61c7cd057503c1ae8f1305e6758c76a7fbb6e24af8"
    },
    "output": {
      "report_sha256": "7bfca08f928d62f7e393a50fcba8f331c3ca8b8c2c4dad5d9bdda8227e0589fe"
    },
    "run_id": "run_82f465a2f43d4b2aa60778b92802a3e6",
    "timestamp": "2026-06-18T14:47:34.816572+00:00",
    "pipeline_versions": {
      "pep_model_version": "claude-opus-4-7",
      "fold_model_version": "esmatlas-esmfold-v1",
      "triage_model_version": "pepfold-triage-v1",
      "secondary_structure_source": "plddt_fallback"
    }
  },
  "attestation": null,
  "next_experiments": {
    "engine": "pepfold-recs-v1",
    "recommendations": [
      {
        "id": "cd_spectroscopy",
        "technique": "CD SPECTROSCOPY",
        "rationale": "experimental secondary structure check. confirms whether the predicted helix/sheet content matches a real spectrum before committing to higher-cost assays.",
        "evidence": "fold_confidence 47% (model is uncertain)",
        "turnaround_days": [
          1,
          3
        ],
        "tier": "biophysical_validation"
      },
      {
        "id": "nmr_hsqc",
        "technique": "1H-15N HSQC",
        "rationale": "if disorder is real, peaks will collapse into a narrow proton dispersion. if the peptide is actually folded, peaks will spread out. cheapest way to distinguish IDP from misfold.",
        "evidence": "disorder_estimate 100% (high)",
        "turnaround_days": [
          2,
          5
        ],
        "tier": "biophysical_validation"
      }
    ]
  },
  "comment": "57 residues of pure loop. no secondary structure at all, just a long floppy ribbon doing nothing in particular. starts with KRASH which feels appropriate given the structural commitment here.",
  "tweet": {
    "id": "2067620577217827302",
    "url": "https://x.com/pepfoldagent/status/2067620577217827302"
  }
}