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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
biochemistry, genetics and molecular biology
Coelacanth genomes reveal signatures for evolutionary transition from water to land
Genome Research, Volume 23, No. 10, Year 2013
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Description
Coelacanths are known as ''living fossils,'' as they show remarkable morphological resemblance to the fossil record and belong to the most primitive lineage of living Sarcopterygii (lobe-finned fishes and tetrapods). Coelacanths may be key to elucidating the tempo and mode of evolution from fish to tetrapods. Here, we report the genome sequences of five coelacanths, including four Latimeria chalumnae individuals (three specimens from Tanzania and one from Comoros) and one L. menadoensis individual from Indonesia. These sequences cover two African breeding populations and two known extant coelacanth species. The genome is ~2.74 Gbp and contains a high proportion (~60%) of repetitive elements. The genetic diversity among the individuals was extremely low, suggesting a small population size and/or a slow rate of evolution. We found a substantial number of genes that encode olfactory and pheromone receptors with features characteristic of tetrapod receptors for the detection of airborne ligands. We also found that limb enhancers of bmp7 and gli3, both of which are essential for limb formation, are conserved between coelacanth and tetrapods, but not ray-finned fishes. We expect that some tetrapod-like genes may have existed early in the evolution of primitive Sarcopterygii and were later co-opted to adapt to terrestrial environments. These coelacanth genomes will provide a cornerstone for studies to elucidate how ancestral aquatic vertebrates evolved into terrestrial animals. © 2013, Published by Cold Spring Harbor Laboratory Press.
Authors & Co-Authors
Nikaido, Masato
Japan, Tokyo
Tokyo Institute of Technology
Noguchi, Hideki
Japan, Tokyo
Tokyo Institute of Technology
Japan, Mishima
National Institute of Genetics Mishima
Nishihara, Hidenori
Japan, Tokyo
Tokyo Institute of Technology
Toyoda, Atsushi
Japan, Mishima
National Institute of Genetics Mishima
Suzuki, Yutaka
Japan, Tokyo
The University of Tokyo
Kajitani, Rei
Japan, Tokyo
Tokyo Institute of Technology
Suzuki, Hikoyu
Japan, Tokyo
Tokyo Institute of Technology
Okuno, Miki
Japan, Tokyo
Tokyo Institute of Technology
Aibara, Mitsuto
Japan, Tokyo
Tokyo Institute of Technology
Ngatunga, Benjamin P.
Tanzania, Dar es Salaam
Tanzania Fisheries Research Institute Tafiri
Mzighani, Semvua Isa
Tanzania, Dar es Salaam
Tanzania Fisheries Research Institute Tafiri
Kalombo, Hassan W.J.
Tanzania, Tanga
Regional Commissioner's Office Tanga
Masengi, Kawilarang W.A.
Indonesia, Manado
Universitas Sam Ratulangi
Tuda, Josef Sem Berth
Indonesia, Manado
Universitas Sam Ratulangi
Nogami, Sadao
Japan, Tokyo
Nihon University
Maeda, Ryuichiro
Japan, Obihiro
Obihiro University of Agriculture and Veterinary Medicine
Iwata, Masamitsu
Japan, Iwaki
Marine Science Museum
Abe, Yoshitaka
Japan, Iwaki
Marine Science Museum
Fujimura, Koji
Japan, Tokyo
The Jikei University School of Medicine
Okabe, Masataka
Japan, Tokyo
The Jikei University School of Medicine
Amano, Takanori
Japan, Mishima
National Institute of Genetics Mishima
Maeno, Akiteru
Japan, Mishima
National Institute of Genetics Mishima
Shiroishi, Toshihiko
Japan, Mishima
National Institute of Genetics Mishima
Itoh, Takehiko
Japan, Tokyo
Tokyo Institute of Technology
Sugano, Sumino
Japan, Tokyo
The University of Tokyo
Kohara, Yuji
Japan, Mishima
National Institute of Genetics Mishima
Fujiyama, Asao
Japan, Mishima
National Institute of Genetics Mishima
Okada, Norihiro
Japan, Tokyo
Tokyo Institute of Technology
Taiwan, Tainan
National Cheng Kung University
Japan, Nagahama
Nagahama Institute of Bio-science and Technology
Statistics
Citations: 103
Authors: 28
Affiliations: 12
Identifiers
Doi:
10.1101/gr.158105.113
ISSN:
10889051
e-ISSN:
15495469
Research Areas
Environmental
Genetics And Genomics
Study Design
Cross Sectional Study
Study Locations
Comoros
Tanzania