{"id":3345,"date":"2019-04-18T21:31:47","date_gmt":"2019-04-18T12:31:47","guid":{"rendered":"http:\/\/163.180.4.222\/lab\/?p=3345"},"modified":"2019-10-24T11:36:02","modified_gmt":"2019-10-24T02:36:02","slug":"snailfish-is-first-animal-from-extreme-ocean-depths-to-get-genome-sequenced","status":"publish","type":"post","link":"https:\/\/biochemistry.khu.ac.kr\/lab\/?p=3345","title":{"rendered":"Snailfish is first animal from extreme ocean depths to get genome sequenced & \uc1f3\ub369\uc774\ub3c4 \ucc0c\uadf8\ub7ec\uc9c0\ub294 \ud574\uc800 1\ub9ccm \u2018\ucd5c\uc0c1\uc704 \ud3ec\uc2dd\uc790\u2019 \ubb3c\uace0\uae30\uac00 \uc0ac\ub294 \ubc95"},"content":{"rendered":"

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Gene sequence from fish living in the Mariana Trench reveals clues to living life under pressure.<\/h5>\n

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Hadal snailfish (Pseudoliparis swirei<\/i>) gather around a baited instrument that researchers deployed in the Mariana Trench in 2014.<\/span>Credit: SOI\/HADES\/University of Aberdeen\/Dr. Alan Jamieson<\/p>\n<\/figcaption><\/figure>\n

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A flabby, translucent creature called the hadal snailfish (Pseudoliparis swirei<\/i>) is the first animal from the extreme depths of the ocean to have its genome sequenced. Its genetic road map is revealing the basis of adaptations that enable animals to live in hostile environments such as the\u00a0Mariana Trench<\/a>, the deepest place in the ocean.<\/p>\n

Deep-sea creatures must cope with a cold, dark and extreme-pressure environment. But without the genome of any animal living below 6,000 metres \u2014 a region known as the hadal zone \u2014 scientists weren\u2019t sure how the creatures acquired the adaptations necessary to survive. Results published on 15 April in\u00a0Nature Ecology & Evolution<\/i>1<\/a><\/sup>\u00a0point to skeletal and cellular changes on which the hadal snailfish relies to endure these harsh conditions.<\/p>\n

Nothing quite like this study has ever been done before, says Paul Yancey, a marine biologist at Whitman College in Walla Walla, Washington. \u201cIt\u2019s exciting.\u201d<\/p>\n

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Living under pressure<\/strong><\/p>\n

The study authors captured hadal snailfish from about 7,000 metres down in the Mariana Trench in the western Pacific Ocean. After sequencing the fish\u2019s genome, the team searched for clues that could explain hadal snailfish traits such as a\u00a0skeleton made of cartilage<\/a>\u00a0and cellular membranes that keep working under immense pressures. The pressure in the Mariana Trench is similar to what someone would feel if the entire weight of the Eiffel Tower rested on their big toe.<\/p>\n

The researchers compared the fish\u2019s DNA to that of a close relative, the Tanaka\u2019s snailfish (Liparis tanakae<\/i>), which lives in tide pools. The two species split from a common ancestor about 20 million years ago.<\/p>\n

There are several genetic changes in the hadal snailfish genome linked to a rapid adaptation to the deep sea, says Shunping He, an ichthyologist at the Chinese Academy of Sciences in Wuhan, and co-lead author of the study.<\/p>\n

The high pressures in the Mariana Trench would crush normal bones. But a gene integral to hardening bones is inactive in the hadal snailfish \u2014 consistent with the idea that a skeleton made of cartilage is more pressure-tolerant, the authors write.<\/p>\n

Hadal snailfish have also lost several genes involved in sensing light. However, He and his colleagues did find five such genes that are still active, suggesting that the fish might have a residual ability to see.<\/p>\n

Some groups of genes, many of which are involved in fatty-acid metabolism, have expanded in the hadal snailfish. The presence of certain fatty acids helps cell membranes to stay flexible at great depths, the authors write. Otherwise, high pressure can cause those membranes to become rigid and impenetrable. Other genes act to prevent proteins from folding incorrectly under extreme pressure.<\/p>\n

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One of a kind?<\/strong><\/p>\n

It\u2019s thrilling to see this genome sequence, as well as ideas about how vertebrates adapt to extreme depths, says Santiago Herrera, a molecular ecologist at Lehigh University in Bethlehem, Pennsylvania. \u201cUnderstanding how this kind of life is possible in this environment is really ground-breaking.\u201d<\/p>\n

The study also creates a basis for future work looking at how fish have evolved to survive in extreme environments, says Natalya Gallo, an oceanographer at Scripps Institution of Oceanography in La Jolla, California. Now, researchers can conduct lab-based experiments with tools such as CRISPR, editing genes to explore the traits that they control, she adds.<\/p>\n

It\u2019ll be interesting to see whether the genetics behind hadal snailfish adaptations are representative of animals in the deep sea, or whether each species has its own set of genetic strategies to survive this extreme environment, Herrera says.<\/p>\n

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doi: 10.1038\/d41586-019-01158-x<\/div>\n

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(\uc6d0\ubb38: \uc5ec\uae30<\/a>\ub97c \ud074\ub9ad\ud558\uc138\uc694~)<\/p>\n

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\ub9c8\ub9ac\uc544\ub098\ud574\uad6c\ub294 \uc9c0\uad6c\uc0c1\uc5d0\uc11c \uc0dd\ubb3c\uc5d0\uac8c \uac00\uc7a5 \uac00\ud639\ud55c \ud658\uacbd\uc73c\ub85c \uaf3d\ud78c\ub2e4. \ub192\uc740 \uc218\uc555\uacfc \ube5b\uc774 \uc804\ud600 \ub4e4\uc9c0 \uc54a\ub294 \uc554\ud751 \uc678\uc5d0\ub3c4 1~4\ub3c4 \uc815\ub3c4\uc5d0 \ubd88\uacfc\ud55c \ub0ae\uc740 \uc218\uc628\uacfc \ub0ae\uc740 \uc0b0\uc18c \ub18d\ub3c4, \ubd80\uc871\ud55c \uba39\uc774 \uc790\uc6d0 \ub4f1 \uc0dd\uc874\uc5d0 \ubd80\uc801\ud569\ud55c \uc694\uc18c\ub4e4\ub85c \uac00\ub4dd\ud558\uae30 \ub54c\ubb38\uc774\ub2e4.<\/p>\n

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\uc11c\ubd81\uacf5\uc5c5\ub300 \uc5f0\uad6c\uc9c4\uc740 \ub9c8\ub9ac\uc544\ub098 \uc2a4\ub124\uc77c\ud53c\uc2dc\uc758 \uccb4\ub0b4\uc5d0\uc11c \ub2e8\ubc31\uc9c8\uc774 \uc720\uc9c0\ub418\ub294 \uc774\uc720\ub3c4 \ud655\uc778\ud588\ub2e4. \uc218\uc555\uc774 \uadf9\ub3c4\ub85c \ub192\uae30 \ub54c\ubb38\uc5d0 \uccb4\ub0b4 \ub2e8\ubc31\uc9c8\uc774 \ubcc0\uc131\ub418\ub294 \uac83\uc744 \ub9c9\uc544\uc8fc\ub294 \ubb3c\uc9c8\uc774 \uccb4\ub0b4\uc5d0 \ub2e4\ub7c9\uc73c\ub85c \uc874\uc7ac\ud558\ub294 \uac8c \ub4dc\ub7ec\ub0ac\ub2e4. \uc5f0\uad6c\uc9c4\uc740 \u2018\ud2b8\ub9ac\uba54\ud2f8\uc544\ubbfc\uc5d4\uc625\uc0ac\uc774\ub4dc(TMAO<\/span>)\u2019\ub77c\uace0 \ubd88\ub9ac\ub294 \uc774 \ubb3c\uc9c8\uc774 \ub2e8\ubc31\uc9c8\uc744 \uc548\uc815\uc2dc\ud0a4\ub294 \uc5ed\ud560\uc744 \ub2f4\ub2f9\ud558\uace0 \uc788\ub2e4\uace0 \uc124\uba85\ud588\ub2e4. \uccb4\ub0b4\uc758 \ub2e8\ubc31\uc9c8 \uc911 \uc138\ud3ec \uac04 \ubb3c\uc9c8 \uc774\ub3d9\uc744 \ub3d5\ub294 \ub2e8\ubc31\uc9c8\ub3c4 \ud655\uc778\ub410\ub2e4. \ub192\uc740 \uc218\uc555\ud558\uc5d0\uc11c\ub294 \uc138\ud3ec\ub9c9\uc744 \ud1b5\ud574 \ubb3c\uc9c8\uc774 \uad50\ud658\ub418\uae30 \uc5b4\ub824\uc6b8 \uc218 \uc788\ub294\ub370 \ub9c8\ub9ac\uc544\ub098 \uc2a4\ub124\uc77c\ud53c\uc2dc\uc758 \uccb4\ub0b4\uc5d0\uc11c\ub294 \uc0dd\uc874\uc5d0 \ud544\uc694\ud55c \ubb3c\uc9c8\uc744 \uc6b4\ubc18\ud558\ub294 \uc5ed\ud560\uc758 \ub2e8\ubc31\uc9c8\uc774 \ub300\ub7c9\uc73c\ub85c \uc0dd\uc131\ub418\uace0 \uc788\uc5c8\ub2e4\ub294 \uac83\uc774\ub2e4.<\/p>\n

\uc5f0\uad6c\uc9c4\uc740 \ub9c8\ub9ac\uc544\ub098 \uc2a4\ub124\uc77c\ud53c\uc2dc\uac00 \ubb34\uc778\ud0d0\uc0ac\uae30\uc758 \uc870\uba85\uc5d0 \uc804\ud600 \ubc18\uc751\ud558\uc9c0 \uc54a\uc558\ub2e4\uace0 \ubc1d\ud614\ub2e4. \ube5b\uc774 \uc804\ud600 \ub4e4\uc9c0 \uc54a\ub294 \ud658\uacbd\uc5d0 \uc11c\uc2dd\ud558\uace0 \uc788\uc5b4 \uc2dc\uac01\uc774 \ud1f4\ud654\ub3fc \uc788\uae30 \ub54c\ubb38\uc774\ub2e4. \uc5f0\uad6c\uc9c4\uc740 \u201c\ube5b\uc758 \uc790\uadf9\uc5d0 \ubc18\uc751\ud558\ub294 \uad11\uc218\uc6a9\uccb4 \uad00\ub828 \uc720\uc804\uc790 \uac00\uc6b4\ub370 \uc911\uc694\ud55c \uae30\ub2a5\uc744 \ud558\ub294 \uc720\uc804\uc790\ub4e4\uc774 \uc774 \ubb3c\uace0\uae30\uc758 \uccb4\ub0b4\uc5d0 \uc874\uc7ac\ud558\uc9c0 \uc54a\ub294 \uac83\uc73c\ub85c \ubcf4\uc778\ub2e4\u201d\uba70 \u201c\ube5b\uc744 \uac10\uc9c0\ud560 \ud544\uc694\uac00 \uc804\ud600 \uc5c6\ub294 \ud658\uacbd\uc5d0 \uc11c\uc2dd\ud558\uae30 \ub54c\ubb38\u201d\uc774\ub77c\uace0 \uc124\uba85\ud588\ub2e4.<\/p>\n

 <\/p>\n

 <\/p>\n

(\uc6d0\ubb38: \uc5ec\uae30<\/a>\ub97c \ud074\ub9ad\ud558\uc138\uc694~)<\/p>\n

 <\/p>\n

 <\/p>\n

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  Gene sequence from fish living in the Mariana Trench reveals clues to living life under pressure.   Hadal snailfish (Pseudoliparis swirei) gather around 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