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The dental proteome ofHomo antecessor

Naturevolume 580, pages235–238 (2020)Cite this article

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AnAuthor Correction to this article was published on 29 July 2020

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Abstract

The phylogenetic relationships between hominins of the Early Pleistocene epoch in Eurasia, such asHomo antecessor, and hominins that appear later in the fossil record during the Middle Pleistocene epoch, such asHomo sapiens, are highly debated1,2,3,4,5. For the oldest remains, the molecular study of these relationships is hindered by the degradation of ancient DNA. However, recent research has demonstrated that the analysis of ancient proteins can address this challenge6,7,8. Here we present the dental enamel proteomes ofH. antecessor from Atapuerca (Spain)9,10 andHomo erectus from Dmanisi (Georgia)1, two key fossil assemblages that have a central role in models of Pleistocene hominin morphology, dispersal and divergence. We provide evidence thatH. antecessor is a close sister lineage to subsequent Middle and Late Pleistocene hominins, including modern humans, Neanderthals and Denisovans. This placement implies that the modern-like face ofH. antecessor—that is, similar to that of modern humans—may have a considerably deep ancestry in the genusHomo, and that the cranial morphology of Neanderthals represents a derived form. By recovering AMELY-specific peptide sequences, we also conclude that theH. antecessor molar fragment from Atapuerca that we analysed belonged to a male individual. Finally, theseH. antecessor andH. erectus fossils preserve evidence of enamel proteome phosphorylation and proteolytic digestion that occurred in vivo during tooth formation. Our results provide important insights into the evolutionary relationships betweenH. antecessor and other hominin groups, and pave the way for future studies using enamel proteomes to investigate hominin biology across the existence of the genusHomo.

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Fig. 1: Phosphorylation of hominin enamel proteomes.
Fig. 2: Phylogenetic analysis ofH. antecessor ATD6-92.
Fig. 3: Skeletal proteome preservation in the Middle and Early Pleistocene epoch (0.12–2.6 Ma).

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Data availability

Mass spectrometry proteomics data have been deposited in the ProteomeXchange Consortium (http://proteomecentral.proteomexchange.org) via the PRIDE partner repository with the dataset identifier PXD014342. Generated ancient protein consensus sequences used for phylogenetic analysis forH. antecessor (Atapuerca) andH. erectus (Dmanisi) hominins can be found in the Supplementary Data 2, which is formatted as a .fasta file. Full protein sequence alignments used during phylogenetic analysis can be accessed via Figshare (https://doi.org/10.6084/m9.figshare.9927074). Amino acid racemization data are available online through the NOAA database. The wiNNer model can be accessed on GitHub (https://github.com/cox-labs/wiNNer.git).

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Acknowledgements

F.W. is supported by a Marie Skłodowska Curie Individual Fellowship (no. 795569). E. Cappellini was supported by VILLUM FONDEN (no. 17649). E.W. is supported by the Lundbeck Foundation, the Danish National Research Foundation, the Novo Nordisk Foundation, the Carlsberg Foundation, KU2016 and the Wellcome Trust. Without the effort of the members of the Atapuerca research team during fieldwork, this work would have not been possible; we make a special mention of J. Rosell, who supervises the excavation of the TD6 level. The research of the Atapuerca project has been supported by the Dirección General de Investigación of the Ministerio de Ciencia, Innovación y Universidades (grant numbers PGC2018-093925-B-C31, C32, and C33); field seasons are supported by the Consejería de Cultura y Turismo of the Junta de Castilla y León and the Fundación Atapuerca. We acknowledge The Leakey Foundation through the personal support of G. Getty (2013) and D. Crook (2014–2016, 2018, and 2019) to M.M.-T., as well as F.W. (2017). Restoration and conservation work on the material have been carried out by P. Fernández-Colón and E. Lacasa from the Conservation and Restoration Area of CENIEH-ICTS and L. López-Polín from IPHES. The picture of the specimen ATD6-92 was made by M. Modesto-Mata. E. Cappellini, J.C., J.V.O. and P. Gutenbrunner are supported by the Marie Skłodowska-Curie European Training Network (ETN) TEMPERA, a project funded by the European Union’s Framework Program for Research and Innovation Horizon 2020 (grant agreement no. 722606). Amino acid analyses were undertaken thanks to the Leverhulme Trust (PLP-2012-116) and NERC (NE/K500987/1). T.M.-B. is supported by BFU2017-86471-P (MINECO/FEDER, UE), U01 MH106874 grant, Howard Hughes International Early Career, Obra Social ‘La Caixa’ and Secretaria d’Universitats i Recerca and CERCA Programme del Departament d’Economia i Coneixement de la Generalitat de Catalunya (GRC 2017 SGR 880). C.L.-F. is supported by a FEDER-MINECO grant (PGC2018-095931-B-100). M.K. was supported by the Postdoctoral Junior Leader Fellowship Programme from ‘la Caixa’ Banking Foundation (LCF/BQ/PR19/11700002). M.M. is supported by the Danish National Research Foundation award PROTEIOS (DNRF128). Work at the Novo Nordisk Foundation Center for Protein Research is funded in part by a donation from the Novo Nordisk Foundation (grant number NNF14CC0001). The CRG/UPF Proteomics Unit is part of the Spanish Infrastructure for Omics Technologies (ICTS OmicsTech) and it is a member of the ProteoRed PRB3 consortium, which is supported by grant PT17/0019 of the PE I+D+i 2013-2016 from the Instituto de Salud Carlos III (ISCIII) and ERDF. We acknowledge support from the Spanish Ministry of Science, Innovation and Universities, ‘Centro de Excelencia Severo Ochoa 2013-2017’, SEV-2012-0208, and ‘Secretaria d’Universitats i Recerca del Departament d’Economia i Coneixement de la Generalitat de Catalunya’ (2017SGR595). D.L. and A.M. are supported by the John Templeton Foundation (no. 52935) and by the Shota Rustaveli National Science Foundation of Georgia (no. FR-18-27262). We thank M. L. Schjellerup Jørkov for providing specimen Ø1952.

Author information

Author notes

  1. These authors contributed equally: Frido Welker, Jazmín Ramos-Madrigal, Petra Gutenbrunner

Authors and Affiliations

  1. Evolutionary Genomics Section, Globe Institute, University of Copenhagen, Copenhagen, Denmark

    Frido Welker, Jazmín Ramos-Madrigal, Meaghan Mackie & Enrico Cappellini

  2. Computational Systems Biochemistry, Max Planck Institute of Biochemistry, Martinsried, Germany

    Petra Gutenbrunner, Shivani Tiwary & Jürgen Cox

  3. The Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Copenhagen, Denmark

    Meaghan Mackie, Rosa Rakownikow Jersie-Christensen & Jesper V. Olsen

  4. Center for Genomic Regulation (CNAG-CRG), Barcelona Institute of Science and Technology, Barcelona, Spain

    Cristina Chiva, Tomas Marques-Bonet & Eduard Sabidó

  5. Proteomics Unit, University Pompeu Fabra, Barcelona, Spain

    Cristina Chiva & Eduard Sabidó

  6. Department of Chemistry, University of York, York, UK

    Marc R. Dickinson & Kirsty Penkman

  7. Institute of Evolutionary Biology (UPF-CSIC), University Pompeu Fabra, Barcelona, Spain

    Martin Kuhlwilm, Marc de Manuel, Pere Gelabert, Tomas Marques-Bonet & Carles Lalueza-Fox

  8. Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), Burgos, Spain

    María Martinón-Torres & José María Bermúdez de Castro

  9. Anthropology Department, University College London, London, UK

    María Martinón-Torres & José María Bermúdez de Castro

  10. Georgian National Museum, Tbilisi, Georgia

    Ann Margvelashvili & David Lordkipanidze

  11. Centro Mixto UCM-ISCIII de Evolución y Comportamiento Humanos, Madrid, Spain

    Juan Luis Arsuaga

  12. Departamento de Paleontología, Facultad de Ciencias Geológicas, Universidad Complutense de Madrid, Madrid, Spain

    Juan Luis Arsuaga

  13. Departamento d’Història i Història de l’Art, Universidad Rovira i Virgili, Tarragona, Spain

    Eudald Carbonell

  14. Institut Català de Paleoecologia Humana i Evolució Social (IPHES), Tarragona, Spain

    Eudald Carbonell

  15. Catalan Institution of Research and Advanced Studies (ICREA), Barcelona, Spain

    Tomas Marques-Bonet

  16. Institut Català de Paleontologia Miquel Crusafont, Universitat Autònoma de Barcelona, Barcelona, Spain

    Tomas Marques-Bonet

  17. Tbilisi State University, Tbilisi, Georgia

    David Lordkipanidze

  18. Lundbeck Foundation GeoGenetics Centre, Globe Institute, University of Copenhagen, Copenhagen, Denmark

    Fernando Racimo & Eske Willerslev

  19. Department of Zoology, University of Cambridge, Cambridge, UK

    Eske Willerslev

  20. Wellcome Sanger Institute, Hinxton, UK

    Eske Willerslev

  21. Danish Institute for Advanced Study, University of Southern Denmark, Odense, Denmark

    Eske Willerslev

Authors
  1. Frido Welker
  2. Jazmín Ramos-Madrigal
  3. Petra Gutenbrunner
  4. Meaghan Mackie
  5. Shivani Tiwary
  6. Rosa Rakownikow Jersie-Christensen
  7. Cristina Chiva
  8. Marc R. Dickinson
  9. Martin Kuhlwilm
  10. Marc de Manuel
  11. Pere Gelabert
  12. María Martinón-Torres
  13. Ann Margvelashvili
  14. Juan Luis Arsuaga
  15. Eudald Carbonell
  16. Tomas Marques-Bonet
  17. Kirsty Penkman
  18. Eduard Sabidó
  19. Jürgen Cox
  20. Jesper V. Olsen
  21. David Lordkipanidze
  22. Fernando Racimo
  23. Carles Lalueza-Fox
  24. José María Bermúdez de Castro
  25. Eske Willerslev
  26. Enrico Cappellini

Contributions

E. Cappellini, E.W., J.M.B.d.C., D.L., C.L.-F. and F.W. designed the study. E. Cappellini, M.M., F.W., J.R.-M., R.R.J.-C., M.R.D., C.C. and M.d.M. performed experiments. E. Cappellini, A.M., J.L.A., E. Carbonell, P. Gelabert, E.S., J.C., J.V.O., T.M.-B. and D.L. provided material, reagents or research infrastructure. F.W., J.R.-M., P. Gutenbrunner, S.T., E. Cappellini, F.R., M.M.-T., J.M.B.d.C., M.K., M.R.D., C.L.-F. and K.P. analysed data. F.W., E. Cappellini and J.M.B.d.C. wrote the manuscript with input from all other authors.

Corresponding authors

Correspondence toFrido Welker,José María Bermúdez de Castro,Eske Willerslev orEnrico Cappellini.

Ethics declarations

Competing interests

The authors declare no competing interests.

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Extended data figures and tables

Extended Data Fig. 1 Location and stratigraphy of the hominin fossils studied.

a, Geographic location of Gran Dolina and Dmanisi. Base map was generated using public domain data fromwww.naturalearthdata.com.b, Summarized stratigraphic profile of Gran Dolina, including the location of hominin fossils in layers ‘Pep’ and ‘Jordi’ of sublevel TD6.2.

Extended Data Fig. 2 Hominin specimens studied.

a, ATD6-92 in buccal view. The fragment represents a portion of a permanent lower left first or second molar.b, D4163 in occlusal view. The specimen is a fragmented right upper first molar. Scale bar differs betweena andb.

Extended Data Fig. 3 Amino acid racemization of D4163.

a,b, The extent of intracrystalline racemization in enamel for the free amino acid (FAA) (x axis) fraction and the total hydrolysable amino acids (THAA) (y axis) fraction for aspartic acid plus asparagine (here denoted Asx) (a), and glutamic acid plus glutamine (here denoted Glx) (b), demonstrates endogenous amino acids breaking down within a closed system. The hominin value is displayed in relation to values for enamel samples from other fauna from Dmanisi6 (blue squares) and a range of previously obtained Pleistocene and Pliocene Proboscidea from the UK40 (grey diamonds). Fauna are shown for comparison, but different rates in their protein breakdown mean that they will show different extents of racemization. Thex andy axis are on different scales.

Extended Data Fig. 4 Sequence coverage for five enamel-specific proteins across Pleistocene samples and recent human controls.

For each protein, the bars span protein positions covered, with positions remapped to the human reference proteome. The top row indicates the position of a selection of known MMP20 and KLK4 cleavage products of the enamel-specific proteins AMELX55, AMBN52 and ENAM56. Several in vivo proteolytic degradation fragments of ENAM share the same N terminus, but have unknown C termini53. Dotted line for AMBN indicates a putative cleavage product based on known MMP20 (squares) and KLK4 (circles) in vivo cleavage positions. For AMTN, serines (S) at positions 115 and 116 (indicated by asterisks) are conserved among vertebrates and involved in mineral-binding21. Additional cleavage products as well as MMP20 and KLK4 cleavage sites are known in all enamel-specific proteins. SK33916 and Ø1952 are two recent human control samples (Methods). AA, amino acids;Steph.,Stephanorhinus6; TRAP, tyrosine-rich amelogenin polypeptide.

Extended Data Fig. 5Homo antecessor specimen ATD6-92 represents a male hominin.

a, Mass spectrum of an AMELY-specific peptide from the recent human control Ø1952.b, Mass spectrum of the same AMELY-specific peptide fromH. antecessor.c, Alignment of a selection of AMELY- and AMELX-specific peptide fragment ion series deriving fromH. antecessor. The alignment stretches along human AMELX isoform 1, positions 37 to 52 only (Uniprot accession numbers Q99217 (AMELX), Q99218 (AMELY)). See Supplementary Fig.5 for another example of an AMELY-specific MS2 spectrum.

Extended Data Fig. 6 Enamel proteome damage.

a,b, Glutamine (Q) and asparagine (N) deamidation of enamel-specific proteins fromH. antecessor (Atapuerca) (a), andH. erectus (Dmanisi) (b). Values are based on 1,000 bootstrap replications of protein deamidation.c, Relationship between mean asparagine (N) and glutamine (Q) deamidation for all proteins in both the Atapuerca and Dmanisi hominin datasets. Error bars represent 95% confidence interval window of 1,000 bootstrap replications of protein deamidation. Dashed line isx = y.d, Peptide length distribution ofH. antecessor (Atapuerca),H. erectus (Dmanisi), four previously published enamel proteomes6,8,16 and one additional human Medieval control sample (Ø1952). Fora,b andd, the number of peptides (n) is given for each violin plot. The box plots within the violin plots define the range of the data (whiskers extend to 1.5× the interquartile range), outliers (black dots, beyond 1.5× the interquartile range), 25th and 75th percentiles (boxes), and medians (centre lines).P values of two-sidedt-tests conducted between sample pairs are indicated. No independent replication of these experiments was performed.

Extended Data Fig. 7 Survival of in vivo MMP20 and KLK4 cleavage sites in the Atapuerca enamel proteome.

a, Experimentally observed cleavage matrices for ameloblastin (AMBN), enamelin (ENAM) and amelogenin (AMELX and AMELY) (Methods). Fold differences are colour-coded by comparing observed PSM cleavage frequencies to a random cleavage matrix for each protein separately7.b, Fold differences for all observed cleavage pairs per protein. Red filled circles represent MMP20, KLK4 and signal peptide cleavage sites mentioned in the literature53,54,55,56. Red open circles indicate cleavage sites located up to two amino acid positions away from such sites.c, PSM coverage for each protein. The signal peptide (thick horizontal bar labelled ‘sig’), known MMP20 and KLK4 cleavage sites (vertical bars), and O- and N-linked glycosylation sites (asterisks) are also indicated. For AMELX, peptide positions for all three known isoforms were remapped to the coordinates of isoform 3, which represents the longest isoform (UniProt accession Q99217-3). Thex andy axes differ between the three panels ofc.

Extended Data Fig. 8 Phylogenetic position of D4163 through Bayesian analysis.

Nomascus leucogenys andM. mulatta were used as outgroups.

Extended Data Table 1 Extraction and mass spectrometry details of analyses conducted on both ancient hominin specimens
Extended Data Table 2 Ancient hominin enamel proteome composition and coverage

Supplementary information

Supplementary Information

Supplementary Information containing supplementary information on the archaeological sites of Gran Dolina, Atapuerca, and Dmanisi, amino acid racemization, proteomic data extraction, data generation, and data analysis, as well as phylogenetic analysis of recovered ancient hominin proteomes. The Supplementary Information contains 11 SI tables and 16 SI figures.

Supplementary Data

Supplementary information file containing annotated MS/MS spectra of phylogenetic interest.

Supplementary Data

File in .fasta format containing recovered Homo antecessor (Atapuerca) and Homo erectus (Dmanisi) protein sequences. Sequence coverage obtained after MaxQuant and PEAKS analysis is combined.

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Welker, F., Ramos-Madrigal, J., Gutenbrunner, P.et al. The dental proteome ofHomo antecessor.Nature580, 235–238 (2020). https://doi.org/10.1038/s41586-020-2153-8

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Deep-time phylogenetic inference by paleoproteomic analysis of dental enamel

  • Alberto J. Taurozzi
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  • Enrico Cappellini
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