{
  "date": "2026-10-13",
  "headline": "M5 reference corrected; superiority over both strong baselines is not established.",
  "status": "V4 research models trained and tested on reused development studies",
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          "uorf_overlaps_main_orf",
          "min_dist_stop_to_cds",
          "kozak_max",
          "kozak_first",
          "utr_len",
          "utr_gc",
          "utr_dg",
          "kozak_x_dist",
          "n_uorfs_x_utrlen",
          "gc_x_dg",
          "main_kozak",
          "cds_len",
          "utr3_len",
          "dg_per_nt",
          "utr_kmer_A",
          "utr_kmer_C",
          "utr_kmer_G",
          "utr_kmer_T",
          "utr_kmer_AA",
          "utr_kmer_AC",
          "utr_kmer_AG",
          "utr_kmer_AT",
          "utr_kmer_CA",
          "utr_kmer_CC",
          "utr_kmer_CG",
          "utr_kmer_CT",
          "utr_kmer_GA",
          "utr_kmer_GC",
          "utr_kmer_GG",
          "utr_kmer_GT",
          "utr_kmer_TA",
          "utr_kmer_TC",
          "utr_kmer_TG",
          "utr_kmer_TT",
          "utr_kmer_AAA",
          "utr_kmer_AAC",
          "utr_kmer_AAG",
          "utr_kmer_AAT",
          "utr_kmer_ACA",
          "utr_kmer_ACC",
          "utr_kmer_ACG",
          "utr_kmer_ACT",
          "utr_kmer_AGA",
          "utr_kmer_AGC",
          "utr_kmer_AGG",
          "utr_kmer_AGT",
          "utr_kmer_ATA",
          "utr_kmer_ATC",
          "utr_kmer_ATG",
          "utr_kmer_ATT",
          "utr_kmer_CAA",
          "utr_kmer_CAC",
          "utr_kmer_CAG",
          "utr_kmer_CAT",
          "utr_kmer_CCA",
          "utr_kmer_CCC",
          "utr_kmer_CCG",
          "utr_kmer_CCT",
          "utr_kmer_CGA",
          "utr_kmer_CGC",
          "utr_kmer_CGG",
          "utr_kmer_CGT",
          "utr_kmer_CTA",
          "utr_kmer_CTC",
          "utr_kmer_CTG",
          "utr_kmer_CTT",
          "utr_kmer_GAA",
          "utr_kmer_GAC",
          "utr_kmer_GAG",
          "utr_kmer_GAT",
          "utr_kmer_GCA",
          "utr_kmer_GCC",
          "utr_kmer_GCG",
          "utr_kmer_GCT",
          "utr_kmer_GGA",
          "utr_kmer_GGC",
          "utr_kmer_GGG",
          "utr_kmer_GGT",
          "utr_kmer_GTA",
          "utr_kmer_GTC",
          "utr_kmer_GTG",
          "utr_kmer_GTT",
          "utr_kmer_TAA",
          "utr_kmer_TAC",
          "utr_kmer_TAG",
          "utr_kmer_TAT",
          "utr_kmer_TCA",
          "utr_kmer_TCC",
          "utr_kmer_TCG",
          "utr_kmer_TCT",
          "utr_kmer_TGA",
          "utr_kmer_TGC",
          "utr_kmer_TGG",
          "utr_kmer_TGT",
          "utr_kmer_TTA",
          "utr_kmer_TTC",
          "utr_kmer_TTG",
          "utr_kmer_TTT"
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        "trainingRows": 10154,
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  "protocol": {
    "createdUtc": "2026-10-13T13:34:49.948258+00:00",
    "status": "Frozen before v4 model fits",
    "evaluation": "Retrospective two-study transfer development. No fresh holdout.",
    "selection": "Identical existing aligned-v3 gene-hash inner 80/20 split; maximize validation Spearman. Outer-study targets never select configurations.",
    "candidate": "XGBoost 300 trees, learning_rate .03, max_depth 2/3/5, reg_lambda 10/100, min_child_weight 20/80, objective reg:squarederror/reg:pseudohubererror (24 combinations).",
    "ExtraTrees": "250 trees, min_samples_leaf 2/5/10/20, max_features .33/.67/1, max_depth 18/None (24 combinations).",
    "ridge": "24 logarithmically spaced alpha values from .01 to 1e9.",
    "seed": 2026101304,
    "threadLimit": 4,
    "primaryMetric": "Spearman; report MAE and R2 and training-median reference for all cohorts.",
    "uncertainty": "1000 paired gene bootstrap draws, Bonferroni across eight model/study/baseline comparisons. Development-only conditional intervals, not confirmatory evidence.",
    "M4": "Reuse v3 gene-aligned targets/features.",
    "M5": "Use separately labelled GEO counts; paired sample+assay+depletedRPF model for Aliouat. Preserve NMDRHT unpaired assay-by-condition model, as RNA and RPF came from separate experiments. No significant-response filtering.",
    "freshTestGate": "Qualify human matched endpoint and accessible data; audit sample lineage; freeze predictions and primary decision rule before numerical outcome access.",
    "promotion": "Research-only models. No promotion based on retrospective superiority.",
    "inputHashes": {
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  "reconciliation": {
    "status": "Operational target discrepancy reconciled; source-label conflict requires author/raw-read confirmation",
    "finding": "Supplement S1 RNA-labelled contrasts closely match deposited RIBOSEQ-derived contrasts, not deposited RNASEQ contrasts. Prior S1 RPF-minus-RNA differences are therefore not a reliable TE reference.",
    "evidence": [
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        "fractionWithinHalfRoundingUnit": 0.0016796457474423576
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        "medianAbsoluteLfcDifference": 0.0002621865047909844,
        "withinHalfRoundingUnit": 11642,
        "fractionWithinHalfRoundingUnit": 0.886266747868453
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        "assay": "RIBOSEQ",
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        "medianAbsoluteLfcDifference": 0.0002709137960385244,
        "withinHalfRoundingUnit": 11184,
        "fractionWithinHalfRoundingUnit": 0.8514007308160779
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    ],
    "reconstruction": [
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        "assay": "RNASEQ",
        "betaPrior": "FALSE",
        "publishedColumn": "labelled_RNA_UPF1",
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        "baseMeanRelativeMedianError": 0.7748514070094864
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        "betaPrior": "FALSE",
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        "baseMeanRelativeMedianError": 2.5344129282391033e-05
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      {
        "assay": "RIBOSEQ",
        "betaPrior": "FALSE",
        "publishedColumn": "labelled_RPF_UPF1",
        "n": 13025,
        "rho": 0.8904533787572467,
        "medianAbsoluteLfcDifference": 0.04835906252675798,
        "baseMeanRelativeMedianError": 0.5025664135027127
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      {
        "assay": "RIBOSEQ",
        "betaPrior": "TRUE",
        "publishedColumn": "labelled_RNA_UPF1",
        "n": 13136,
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        "medianAbsoluteLfcDifference": 0.0002621865047909844,
        "baseMeanRelativeMedianError": 2.5344129282391033e-05
      },
      {
        "assay": "RIBOSEQ",
        "betaPrior": "TRUE",
        "publishedColumn": "labelled_RPF_UPF1",
        "n": 13025,
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        "baseMeanRelativeMedianError": 0.5025664135027127
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    ],
    "source": "https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE126385",
    "paper": "https://pmc.ncbi.nlm.nih.gov/articles/PMC6973328/",
    "action": "Supersede the earlier M5 v2 TE superiority interpretation. Retain historical results unchanged. V4 uses separately deposited assay counts and paired Aliouat libraries.",
    "limits": [
      "Strong numerical fingerprint is not author confirmation of a publication error. Raw reads were not re-quantified.",
      "Deposited assay labels are supported by GEO sample metadata; transcript/CDS count regions and upstream quantification may still differ.",
      "M5 cross-study biology and target transportability remain unresolved."
    ]
  },
  "holdoutSearch": {
    "date": "2026-10-13",
    "qualifiedFreshHoldouts": 0,
    "searchScope": "Primary-source methods and sample metadata were inspected; candidate numerical outcomes were not opened. This is a bounded search, not proof that no eligible dataset exists.",
    "candidates": [
      {
        "name": "Jackson-Jones 2021 \u00b7 human HeLa nascent RNA",
        "model": "M4",
        "status": "Promising endpoint; required data not located",
        "evidence": "The thesis describes nascent/total RNA stability estimates after UPF1 depletion. Its deposited-data section (printed p94 / PDF p127) specifies only total, membrane and cytoplasmic RNA under GSE152437. All 39 GEO sample titles/metadata were checked; no nascent fraction is listed. Obtain the nascent count matrix and sample metadata, then audit lineage before qualification.",
        "source": "https://era.ed.ac.uk/handle/1842/37947"
      },
      {
        "name": "GSE152437 \u00b7 Longman 2020",
        "model": "M4",
        "status": "Not a qualified decay holdout",
        "evidence": "Deposited RNA abundance/fractionation does not supply the required nascent comparison. Longman2020 RNA libraries also appear in the upstream NMDRHT annotation metadata. Any later nascent release requires a sample-level overlap audit.",
        "source": "https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE152437"
      },
      {
        "name": "GSE245551 \u00b7 Shin 2024",
        "model": "M5",
        "status": "Excluded \u00b7 perturbation mismatch",
        "evidence": "RNA and ribosome libraries are present, but all six sample metadata records describe control or SR-alpha depletion and immunoprecipitation; no UPF1-depleted RNA/RPF arm. This cannot test the fixed UPF1 TE-response endpoint.",
        "source": "https://www.ncbi.nlm.nih.gov/bioproject/PRJNA1028964"
      }
    ],
    "nextDecision": "Prioritize obtaining the Jackson-Jones nascent-RNA matrix and its sample lineage for M4. For M5, another matched human control/UPF1 RNA-plus-RPF study is required. Freeze a final model and predictions before reading any new holdout outcomes; do not relabel reused studies as fresh."
  },
  "nextDecision": "Prioritize obtaining the Jackson-Jones nascent-RNA matrix and its sample lineage for M4. For M5, another matched human control/UPF1 RNA-plus-RPF study is required. Freeze a final model and predictions before reading any new holdout outcomes; do not relabel reused studies as fresh.",
  "modelSummaries": {
    "m4": "M4 improves its NMDRHT transfer correlation from 0.434 to 0.450, but falls from 0.442 to 0.435 on Tani. Tuned ExtraTrees still leads both directions.",
    "m5": "The corrected, paired-count M5 candidate still transfers negatively in both directions and loses to ridge. The earlier supplement-derived M5 TE advantage is superseded."
  }
}
