The identification of archaeological eggshell using peptide markers

Samantha Presslee*, Julie Wilson, Jos Woolley, Julia Best, Douglas Russell, Anita Radini, Roman Fischer, Benedikt Kessler, Rosa Boano, Matthew Collins, Beatrice Demarchi

*Corresponding author for this work
    15 Citations (Scopus)

    Abstract

    Avian eggshell survives well in alkaline and neutral soils, but its potential as an archaeological resource remains largely unexplored, mainly due to difficulties in its identification. Here we exploit the release of novel bird genomes and, for the first time on eggshell, use MALDI-ToF (matrix-assisted laser desorption ionisation-time of flight) mass spectrometry in combination with peptide sequencing by LC-MS/MS. The eggshell proteome is revealed as unexpectedly complex, with 5755 proteins identified for a reference collection comprising 23 bird species. We determined 782 m/z markers useful for eggshell identification, 583 of which could be assigned to known eggshell peptide sequences. These were used to identify eggshell fragments recovered from a medieval site at Freeschool Lane, Leicester. We discuss the specificity of the peptide markers and highlight the importance of assessing the level of taxonomic identification achievable for archaeological interpretation.

    Original languageEnglish
    JournalScience and Technology of Archaeological Research
    Volume3
    Issue number1
    Pages (from-to)89-99
    Number of pages11
    ISSN2054-8923
    DOIs
    Publication statusPublished - 1 Jan 2017

    Keywords

    • birds
    • Eggshell
    • mass spectrometry (ZooMS)
    • proteomics
    • zooarchaeology

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