Accumulation of endosymbiont genomes in an insect autosome followed by endosymbiont replacement.

Autor:	Tvedte ES; Institute for Genome Sciences, University of Maryland School of Medicine, Health Sciences Facility III #2106, 670 West Baltimore Street, Baltimore, MD 21201, USA., Gasser M; Institute for Genome Sciences, University of Maryland School of Medicine, Health Sciences Facility III #2106, 670 West Baltimore Street, Baltimore, MD 21201, USA., Zhao X; Institute for Genome Sciences, University of Maryland School of Medicine, Health Sciences Facility III #2106, 670 West Baltimore Street, Baltimore, MD 21201, USA., Tallon LJ; Institute for Genome Sciences, University of Maryland School of Medicine, Health Sciences Facility III #2106, 670 West Baltimore Street, Baltimore, MD 21201, USA., Sadzewicz L; Institute for Genome Sciences, University of Maryland School of Medicine, Health Sciences Facility III #2106, 670 West Baltimore Street, Baltimore, MD 21201, USA., Bromley RE; Institute for Genome Sciences, University of Maryland School of Medicine, Health Sciences Facility III #2106, 670 West Baltimore Street, Baltimore, MD 21201, USA., Chung M; Institute for Genome Sciences, University of Maryland School of Medicine, Health Sciences Facility III #2106, 670 West Baltimore Street, Baltimore, MD 21201, USA., Mattick J; Institute for Genome Sciences, University of Maryland School of Medicine, Health Sciences Facility III #2106, 670 West Baltimore Street, Baltimore, MD 21201, USA., Sparklin BC; Institute for Genome Sciences, University of Maryland School of Medicine, Health Sciences Facility III #2106, 670 West Baltimore Street, Baltimore, MD 21201, USA., Dunning Hotopp JC; Institute for Genome Sciences, University of Maryland School of Medicine, Health Sciences Facility III #2106, 670 West Baltimore Street, Baltimore, MD 21201, USA; Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA. Electronic address: jdhotopp@som.umaryland.edu.
Jazyk:	angličtina
Zdroj:	Current biology : CB [Curr Biol] 2022 Jun 20; Vol. 32 (12), pp. 2786-2795.e5. Date of Electronic Publication: 2022 Jun 06.
DOI:	10.1016/j.cub.2022.05.024
Abstrakt:	Eukaryotic genomes can acquire bacterial DNA via lateral gene transfer (LGT). 1 A prominent source of LGT is Wolbachia, 2 a widespread endosymbiont of arthropods and nematodes that is transmitted maternally through female germline cells. 3 , 4 The DNA transfer from the Wolbachia endosymbiont wAna to Drosophila ananassae is extensive 5-7 and has been localized to chromosome 4, contributing to chromosome expansion in this lineage. 6 As has happened frequently with claims of bacteria-to-eukaryote LGT, the contribution of wAna transfers to the expanded size of D. ananassae chromosome 4 has been specifically contested 8 owing to an assembly where Wolbachia sequences were classified as contaminants and removed. 9 Here, long-read sequencing with DNA from a Wolbachia-cured line enabled assembly of 4.9 Mbp of nuclear Wolbachia transfers (nuwts) in D. ananassae and a 24-kbp nuclear mitochondrial transfer. The nuwts are <8,000 years old in at least two locations in chromosome 4 with at least one whole-genome integration followed by rapid extensive duplication of most of the genome with regions that have up to 10 copies. The genes in nuwts are accumulating small indels and mobile element insertions. Among the highly duplicated genes are cifA and cifB, two genes associated with Wolbachia-mediated Drosophila cytoplasmic incompatibility. The wAna strain that was the source of nuwts was subsequently replaced by a different wAna endosymbiont. Direct RNA Nanopore sequencing of Wolbachia-cured lines identified nuwt transcripts, including spliced transcripts, but functionality, if any, remains elusive. Competing Interests: Declaration of interests E.S.T. is currently affiliated with NCBI at the National Institutes of Health, Bethesda, MD, USA. M.G. is currently affiliated with Applied Physics Laboratory, Johns Hopkins University, Laurel, MD, USA. M.C. is currently affiliated with the National Institute for Allergy and Infectious Disease at the National Institutes of Health, Bethesda, MD, USA. B.C.S. is currently affiliated with AstraZeneca, Rockville, MD, USA. (Copyright © 2022 The Author(s). Published by Elsevier Inc. All rights reserved.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu