Cited by 499Forensic and Genetic ResearchPleistocene-Era Hominins and ArchaeologyGenomics and Phylogenetic Studies

Separating endogenous ancient DNA from modern day contamination in a Siberian Neandertal

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Skoglund, Pontus, Northoff, Bernd H., Shunkov, Michael V., Derevianko, Anatoli P., Pääbo, Svante, Krause, Johannes, Jakobsson, Mattias·2014·Proceedings of the National Academy of Sciences

Abstract

One of the main impediments for obtaining DNA sequences from ancient human skeletons is the presence of contaminating modern human DNA molecules in many fossil samples and laboratory reagents. However, DNA fragments isolated from ancient specimens show a characteristic DNA damage pattern caused by miscoding lesions that differs from present day DNA sequences. Here, we develop a framework for evaluating the likelihood of a sequence originating from a model with postmortem degradation-summarized in a postmortem degradation score-which allows the identification of DNA fragments that are unlikely to originate from present day sources. We apply this approach to a contaminated Neandertal specimen from Okladnikov Cave in Siberia to isolate its endogenous DNA from modern human contaminants and show that the reconstructed mitochondrial genome sequence is more closely related to the variation of Western Neandertals than what was discernible from previous analyses. Our method opens up the potential for genomic analysis of contaminated fossil material.

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Crossref · 10.1073/pnas.1318934111

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  • By characterizing damage patterns, users can distinguish authentic aDNA from modern contaminants, thereby ensuring the integrity of the dataset.

    “By characterizing damage patterns, users can distinguish authentic aDNA from modern contaminants, thereby ensuring the integrity of the dataset (Jónsson et al. 2013, Skoglund et al. 2014).”

    From Unravelling reference bias in ancient DNA datasets (2024) · cites this paper as Skoglund et al. 2014

    The Results (Model Outline) describe using damage patterns to assess whether a DNA fragment is ancient, and the Discussion reports reducing contamination to negligible levels. But the paper treats this as a likelihood-based distinction, not a guarantee of dataset integrity; the Discussion also recommends further authentication of retained reads. (LLM, conf=0.84)

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Authors
Skoglund, P., Northoff, B. H., Shunkov, M. V., Derevianko, A. P., Pääbo, S., Krause, J., & Jakobsson, M.
Affiliations
  • Uppsala University (SE)
  • Max Planck Institute for Evolutionary Anthropology (DE)
  • Russian Academy of Sciences (RU)
  • Palaeolithic Department, Institute of Archaeology and Ethnography, Russian Academy of Sciences Siberian Branch, Novosibirsk 630090, Russia; and
Venue
Proceedings of the National Academy of Sciences
Published
2014-01-27
Volume
111
Issue
6
Pages
2229-2234
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2112954194
Cited by
499
References
58
Citations by year
2026: 45 · 2025: 68 · 2024: 50 · 2023: 44 · 2022: 35 · 2021: 52 · 2020: 49 · 2019: 27 · 2018: 36 · 2017: 29 · 2016: 24 · 2015: 22 · 2014: 18
FWCI
20.31
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Max Planck Digital Library (submittedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Forensic and Genetic Research
  • Social Sciences › Anthropology › Pleistocene-Era Hominins and Archaeology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
Keywords
ancient DNA, Neanderthals, contamination control, mitochondrial genome, Siberia
MeSH terms
Animals, DNA, Mitochondrial, Humans, Molecular Sequence Data, Siberia, Neanderthals

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