Ancient proteins are complex mixtures and the term palaeoproteomics is used to characterise the study of proteomes in the past.[1] Ancients proteins have been recovered from a wide range of archaeological materials, including bones,[2]teeth,[3]eggshells,[4]leathers,[5]parchments,[6]ceramics,[7] painting binders[8] and well-preserved soft tissues like gut intestines.[9] These preserved proteins have provided valuable information about taxonomic identification, evolution history (phylogeny), diet, health, disease, technology and social dynamics in the past.
Like modern proteomics, the study of ancient proteins has also been enabled by technological advances. Various analytical techniques, for example, amino acid profiling, racemisation dating, immunodetection, Edman sequencing, peptide mass fingerprinting, and tandem mass spectrometry have been used to analyse ancient proteins.[10] The introduction of high-performance mass spectrometry (for example, Orbitrap) in 2000 has revolutionised the field, since the entire preserved sequences of complex proteomes can be characterised.[11]
Over the past decade, the study of ancient proteins has evolved into a well-established field in archaeological science. However, like the research of aDNA (ancient DNA preserved in archaeological remains), it has been limited by several challenges such as the coverage of reference databases, identification, contamination and authentication.[12] Researchers have been working on standardising sampling, extraction, data analysis and reporting for ancient proteins.[13] Novel computational tools such as de novo sequencing[14] and open research[15] may also improve the identification of ancient proteomes.
^Buckley M, Collins M, Thomas-Oates J, Wilson JC (December 2009). "Species identification by analysis of bone collagen using matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry". Rapid Communications in Mass Spectrometry. 23 (23): 3843–3854. Bibcode:2009RCMS...23.3843B. doi:10.1002/rcm.4316. PMID19899187.
^Dallongeville S, Garnier N, Rolando C, Tokarski C (January 2016). "Proteins in Art, Archaeology, and Paleontology: From Detection to Identification". Chemical Reviews. 116 (1): 2–79. doi:10.1021/acs.chemrev.5b00037. PMID26709533.
^Yilmaz M, Fondrie WE, Bittremieux W, Nelson R, Ananth V, Oh S, Noble WS (2023-01-04). "Sequence-to-sequence translation from mass spectra to peptides with a transformer model". bioRxiv: 2023.01.03.522621. doi:10.1101/2023.01.03.522621. S2CID255441838.
^Chi H, Liu C, Yang H, Zeng WF, Wu L, Zhou WJ, et al. (October 2018). "Comprehensive identification of peptides in tandem mass spectra using an efficient open search engine". Nature Biotechnology. 36 (11): 1059–1061. doi:10.1038/nbt.4236. PMID30295672. S2CID52930101.