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Reply to: Insufficient evidence for natural selection associated with the Black Death

The Original Article was published on 19 February 2025

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Fig. 1: Enrichment of sites with high FST in candidate immune loci compared to putatively neutral loci is not an artefact of the allele frequency estimation method or coverage.
Fig. 2: Candidate loci for positive selection.

Data availability

New genotype data were generated for 32 individuals for whom we had previously generated functional data and genotyped at the putatively selected ERAP2 variant. These genotype data are available from the GitHub repository for this project (https://github.com/TaurVil/VilgalysKlunk_response_to_commentary/functional analyses/DATA/genotypes_for_functional_analyses.txt).

Code availability

The code to replicate the analyses described here is available at https://github.com/TaurVil/VilgalysKlunk_response_to_commentary.

References

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Acknowledgements

We thank all members of the Barreiro and Poinar laboratories for their constructive comments and feedback. We thank J. Berg, R. Blekhman, Y. Gilad, N. Gonzales, E. Patin, G. Perry, L. Quintana-Murci and J. Tung for their comments on the paper. Computational resources were provided by the University of Chicago Research Computing Center. This study was supported by grant no. R01-GM134376 to L.B.B., H.N.P. and J.P.-C.; a grant from the Wenner-Gren Foundation to J.F.B. (grant no. 8702); and the Center for Interdisciplinary Study of Inflammatory Intestinal Disorders (grant no. NIDDK P30 DK042086). H.N.P. was supported by an Insight Grant no. 20008499 from the Social Sciences and Humanities Research Council of Canada and The Canadian Institute for Advanced Research under the Humans & the Microbiome programme. T.P.V. was supported by grant nos. F32GM140568 and K99HG013351. X.C. and M. Steinrücken were supported by grant no. R01GM146051.

Author information

Authors and Affiliations

Authors

Contributions

L.B.B., T.P.V. and H.N.P. directed this study. T.P.V. completed all analyses except for the estimation of selection coefficients, which was performed by X.C. and M. Steinrücken. T.P.V., H.N.P. and L.B.B. wrote the paper, with input from all authors (including J.K., C.E.D., M. Shiratori, J.M., R.B., D.E., M.I.P., R.R., S.N.D., J.A.G., J.L.B., A.C., N.V., K.E., J.-C.G., G.B.G., A.D., J.-M.R., V.Y., R.S., C.J.Y., M.B., A.D., J.F.B., D.M., G.A.R. and J.P.-C.). Contributions of all authors to the original publication can be found in ref. 2.

Corresponding authors

Correspondence to Hendrik N. Poinar or Luis B. Barreiro.

Ethics declarations

Competing interests

J.K., A. Devault and J.-M.R. declare financial interest in Daicel Arbor Biosciences, who provided the myBaits hybridization capture kits for this study. The other authors declare no competing interests.

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Extended data figures and tables

Extended Data Fig. 1 Maximum likelihood allele frequency estimates are not biased by coverage.

The difference between simulated “true” allele frequencies and the allele frequency estimated using either the genotype likelihoods (GL) in Klunk et al. or the maximum likelihood (ML) approach outlined by Barton et al. The GL approach shows a bias towards overestimating the frequency of rare variants, which is exaggerated at lower coverages. No similar bias is apparent using the ML approach.

Extended Data Fig. 2 Candidate loci for positive selection, based on the proportion of permutations exceeding the observed patterns.

Loci ranked by evidence for positive selection, shown on the y-axis as the -log10 proportion of permutations where the FST was greater than the observed FST in both London and Denmark, the allele frequency change between pre- and post-Black Death was in the same direction for both London and Denmark, and the allele frequency change between pre- and during-Black Death in London was in the opposite direction. Candidate immune loci (n = 290) are shown in green, and values are jittered along the x-axis to limit overlapping points. Among our 4 original candidate loci, rs2549794 (ERAP2) and rs1052025 (NFATC1) are shown in red. The other two variants failed to meet the criteria where the changes in allele frequency between pre- vs post-Black Death and pre- vs during-Black Death should be in the opposite direction. This plot differs from Fig. 2a in that it shows the proportion of permutations on the y-axis rather than the multivariate p-value used in Fig. 2a.

Supplementary information

Supplementary Tables

This file contains Supplementary Tables 1–4.

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Vilgalys, T.P., Klunk, J., Demeure, C.E. et al. Reply to: Insufficient evidence for natural selection associated with the Black Death. Nature 638, E23–E29 (2025). https://doi.org/10.1038/s41586-024-08497-4

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