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← All articlesEditorial brief · abstract-levelScore 60/100Confidence medium
biorxiv2026-08-13mtDNAmethodscomputationalaDNA

pastForward finishes ancient libraries and screens them for eukaryotic mitochondria at scale

pastForward is a Snakemake pipeline from raw ancient/historical reads to damage-rescaled BAMs, with reports on endogenous content, complexity, and coverage. It maps to multiple references (host plus endosymbiont, COI). Two new tools: ECMSD screens libraries against a mitochondrial reference database for eukaryotic DNA; REVEAL quantifies copy-number of TEs and duplications. Case studies: AMY2B copy number rises across dog domestication including Neolithic samples; the TE opus invades D. melanogaster after the 1800s and is present from 1933. Mitochondria here are a taxonomic detector, not a physiology target.

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Signal profile (abstract-level)

mtDNA · methods · computational · aDNA

Score 60/100BIORXIVmedium confidencemtDNA
60
Importance
62
Mito signal
25
Dysfunction
75
Evidence
15
Translational

Editorial signal profile from the abstract (importance score, mito keywords, dysfunction tags, evidence density, translational cues). Not a figure reproduced from the preprint PDF.

Finding. Ancient-DNA processing can now be one Snakemake run from raw reads to damage-rescaled BAMs, with a mitochondrial database search (ECMSD) that asks which eukaryotes are in the tube, plus a copy-number viewer (REVEAL). The authors replay two known stories as demos: dog AMY2B copy number rising through domestication, and the transposon opus arriving in D. melanogaster by 1933. Mitochondria are the eukaryote detector.

Why this paper matters

aDNA pipelines exist. Combining configurable processing, CNV tracking, and targeted taxonomic profiling, including a mitogenome screen, did not. If you grind historical libraries, that is enough.

What they actually measured

Workflow features; ECMSD/Centrifuge/REVEAL; two longitudinal case studies.

How to read the score

  1. Methods. Confidence is medium (unseen benchmarks).

What to do with it

If you process aDNA, try pastForward and look at ECMSD hits before you trust a nuclear mapping. Do not cite this as mitochondrial biology. The directional implication is that mitogenome screening can sit inside a standard historical-DNA firehose.

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Source preprint

pastForward: a Snakemake pipeline for ancient and historical DNA with eukaryote-wide taxonomic screening and tracking of copy-number variation

10.64898/2026.08.07.743613

Saadain S, Kapun M, Kofler R.

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