PMID- 30641219 OWN - NLM STAT- MEDLINE DCOM- 20190305 LR - 20190305 IS - 1879-0038 (Electronic) IS - 0378-1119 (Linking) VI - 692 DP - 2019 Apr 15 TI - Deep-water sea anemone with a two-chromosome mitochondrial genome. PG - 195-200 LID - S0378-1119(19)30035-6 [pii] LID - 10.1016/j.gene.2018.12.074 [doi] AB - Mitochondrial genome organization of sea anemones appears conserved among species and families, and is represented by a single circular DNA molecule of 17 to 21 kb. The mitochondrial gene content corresponds to the same 13 protein components of the oxidative phosphorylation (OxPhos) system as in vertebrates. Hallmarks, however, include a highly reduced tRNA gene repertoire and the presence of autocatalytic group I introns. Here we demonstrate that the mitochondrial genome of the deep-water sea anemone Protanthea simplex deviates significantly from that of other known sea anemones. The P. simplex mitochondrial genome contains a heavily scrambled order of genes that are coded on both DNA strands and organized along two circular mito-chromosomes, MCh-I and MCh-II. We found MCh-I to be representative of the prototypic sea anemone mitochondrial genome, encoding 12 OxPhos proteins, two ribosomal RNAs, two transfer RNAs, and a group I intron. In contrast, MCh-II was found to be a laterally transferred plasmid-like DNA carrying the conserved cytochrome oxidase II gene and a second allele of the small subunit ribosomal RNA gene. CI - Copyright (c) 2019 Elsevier B.V. All rights reserved. FAU - Dubin, Arseny AU - Dubin A AD - Genomics group, Faculty of Biosciences and Aquaculture, Nord University, Bodo, Norway. Electronic address: arseny.dubin@nord.no. FAU - Chi, Sylvia Ighem AU - Chi SI AD - Department of Medical Biology, Faculty of Health Sciences, UiT - Arctic University of Norway, Tromso, Norway. Electronic address: mersyl2020@yahoo.com. FAU - Emblem, Ase AU - Emblem A AD - Department of Medical Biology, Faculty of Health Sciences, UiT - Arctic University of Norway, Tromso, Norway; Research Laboratory and Department of Laboratory Medicine, Nordland Hospital, Bodo, Norway. Electronic address: ase.eeg.emblem@nordlandssykehuset.no. FAU - Moum, Truls AU - Moum T AD - Genomics group, Faculty of Biosciences and Aquaculture, Nord University, Bodo, Norway. Electronic address: truls.b.moum@nord.no. FAU - Johansen, Steinar D AU - Johansen SD AD - Genomics group, Faculty of Biosciences and Aquaculture, Nord University, Bodo, Norway; Department of Medical Biology, Faculty of Health Sciences, UiT - Arctic University of Norway, Tromso, Norway. Electronic address: steinar.d.johansen@nord.no. LA - eng PT - Journal Article DEP - 20190111 PL - Netherlands TA - Gene JT - Gene JID - 7706761 RN - 0 (RNA, Ribosomal) RN - EC 1.9.3.- (cytochrome C oxidase subunit II) RN - EC 1.9.3.1 (Electron Transport Complex IV) SB - IM MH - Animals MH - Biological Evolution MH - *Chromosomes MH - Electron Transport Complex IV/genetics MH - Gene Transfer, Horizontal MH - *Genome, Mitochondrial MH - Introns MH - Oxidative Phosphorylation MH - Phylogeny MH - RNA, Ribosomal/genetics MH - Sea Anemones/*genetics OTO - NOTNLM OT - Actiniaria OT - Group I intron OT - Mitochondrial genome rearrangement OT - Mitochondrial plasmid OT - Protanthea simplex OT - mtDNA EDAT- 2019/01/15 06:00 MHDA- 2019/03/06 06:00 CRDT- 2019/01/15 06:00 PHST- 2018/09/04 00:00 [received] PHST- 2018/12/10 00:00 [revised] PHST- 2018/12/20 00:00 [accepted] PHST- 2019/01/15 06:00 [pubmed] PHST- 2019/03/06 06:00 [medline] PHST- 2019/01/15 06:00 [entrez] AID - S0378-1119(19)30035-6 [pii] AID - 10.1016/j.gene.2018.12.074 [doi] PST - ppublish SO - Gene. 2019 Apr 15;692:195-200. doi: 10.1016/j.gene.2018.12.074. Epub 2019 Jan 11.