The sea lamprey (Petromyzon marinus) serves as a comparative model for reconstructing vertebrate evolution. To enable more informed analyses, we developed a new assembly of the lamprey germline genome that integrates several complementary data sets. Analysis of this highly contiguous (chromosome-scale) assembly shows that both chromosomal and whole-genome duplications have played significant roles in the evolution of ancestral vertebrate and lamprey genomes, including chromosomes that carry the six lamprey HOX clusters. The assembly also contains several hundred genes that are reproducibly eliminated from somatic cells during early development in lamprey. Comparative analyses show that gnathostome (mouse) homologs of these genes are frequently marked by polycomb repressive complexes (PRCs) in embryonic stem cells, suggesting overlaps in the regulatory logic of somatic DNA elimination and bivalent states that are regulated by early embryonic PRCs. This new assembly will enhance diverse studies that are informed by lampreys' unique biology and evolutionary/comparative perspective.
|Number of pages||8|
|State||Published - Feb 1 2018|
Bibliographical noteFunding Information:
Research reported in this publication was supported by the National Institute of General Medical Sciences of the US National Institutes of Health under award number R01GM104123 to J.J.S., the Stowers Institute under award number SIMR-1001 to H.J.P., M.E.C., L.M.W., S.M.C.R. and R.K., and the Bonneville Power Administration to J.E.H. and S.R.N. E.E.E. is an investigator of the Howard Hughes Medical Institute. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health. Support and resources from the Center for High Performance Computing at the University of Utah are gratefully acknowledged. Additional computational support was provided by The University of Kentucky High Performance Computing complex.
© 2018 The Author(s).
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