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The complete genome sequence of a Neanderthal from the Altai Mountains


We present a high-quality genome sequence of a Neanderthal woman from Siberia. We show that her parents were related at the level of half-siblings and that mating among close relatives was common among her recent ancestors. We also sequenced the genome of a Neanderthal from the Caucasus to low coverage. An analysis of the relationships and population history of available archaic genomes and 25 present-day human genomes shows that several gene flow events occurred among Neanderthals, Denisovans and early modern humans, possibly including gene flow into Denisovans from an unknown archaic group. Thus, interbreeding, albeit of low magnitude, occurred among many hominin groups in the Late Pleistocene. In addition, the high-quality Neanderthal genome allows us to establish a definitive list of substitutions that became fixed in modern humans after their separation from the ancestors of Neanderthals and Denisovans.

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Figure 1: Toe phalanx and location of Neanderthal samples for which genome-wide data are available.
Figure 2: Phylogenetic relationships of the Altai Neanderthal.
Figure 3: Indications of inbreeding in the Altai Neanderthal individual.
Figure 4: Inference of population size change over time.
Figure 5: Relatedness of introgressing archaic and sequenced archaic samples.
Figure 6: Neanderthal gene flow into Siberian Denisovans.
Figure 7: Altai and Denisovan allele sharing with Africans stratified by African allele frequency.
Figure 8: A possible model of gene flow events in the Late Pleistocene.

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Accession codes


European Nucleotide Archive

Data deposits

All sequence data have been submitted to the European Nucleotide Archive (ENA) and are available under the following accessions: Altai Neanderthal: ERP002097, Mezmaiskaya Neanderthal: ERP002447. The data from the 25 present-day human genomes and 13 experimentally phased present-day genomes are available as a public dataset from and from


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We thank M. Hammer, C. Winkler and W. Klitz for sharing DNA samples; W. Huttner and his group, B. Peter, J. G. Schraiber and M. A. Yang for helpful discussions; and A. Lewis and R. Qiu for technical assistance. N.P. and D.R. are grateful for the chance to discuss these results with Peter Waddell who independently found evidence of a deeply diverged hominin admixing into the Denisova genome. D.R. and E.E.E. are Howard Hughes Medical Institute Investigators. D.R. and N.P. were supported by NSF grant number 1032255 and NIH grant GM100233; E.E.E. by NIH grant HG002385; J.S. by grant HG006283 from the National Genome Research Institute (NHGRI); S.S. by a post-doctoral fellowship from the Harvard University Science of the Human Past Program; F.J. and M.S. in part by a grant from the NIH (R01-GM40282); P.H.S. by an HHMI International Student Fellowship. We thank the team at the NIH Intramural Sequencing Center and Alice Young in particular, for generating some of the sequence reported here. This research was supported in part by the Paul G. Allen Family Foundation. Major funding support came from the Presidential Innovation Fund of the Max Planck Society.

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Authors and Affiliations



S.Saw., A.H. and Q.F. performed the experiments; K.P., F.R., N.P., F.J., S.San., S.Saw., A.H., G.R., P.H.S., C.d.F., M.D., Q.F., M.Ki., M.Ku., M.L., M.M., M.O., M.Si., C.T., H.L., S.M., A.T., P.M., J.P., J.C.M., S.H.V., R.E.G., I.H., P.L.F.J., J.O.K., J.S., E.E.E., E.S.L., T.E.B., M.Sl., D.R., J.K., and S.P. analysed genetic data; L.V.G., V.B.D., M.V.S., A.P.D. and B.V. analysed archaeological and anthropological data; H.B. and H.C. provided samples and reagents; K.P., J.K. and S.P. wrote and edited the manuscript with input from all authors.

Corresponding authors

Correspondence to Montgomery Slatkin, David Reich or Svante Pääbo.

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Competing interests

The authors declare no competing financial interests.

Extended data figures and tables

Extended Data Figure 1 Heterozygosity estimates for the Altai Neanderthal individual, the Denisovan individual, non-Africans and Africans.

The bars for the latter two give the range of heterozygosity observed among 15 non-African and 10 African individuals, respectively (Supplementary Information section 9).

Extended Data Figure 2 Neanderthal-introgressed loci in Denisova.

Divergence of the Altai Neanderthal to the most closely related Denisovan haplotype in windows of at least 200 kb on chromosome 6. Divergence is given as percentage of human–chimpanzee divergence and bars represent ± 1 standard error.

Extended Data Table 1 Neanderthal ancestry estimate
Extended Data Table 2 Selected D-statistics supporting inferences about gene flows
Extended Data Table 3 Lineage-specific segmental duplications along each of the terminal branches and genes encompassed

Supplementary information

Supplementary Information

This file contains Supplementary Text, Tables and Figures – see contents page for details. (PDF 16537 kb)

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Prüfer, K., Racimo, F., Patterson, N. et al. The complete genome sequence of a Neanderthal from the Altai Mountains. Nature 505, 43–49 (2014).

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