Navigation Links
Getting under the shell of the turtle genome

The genome of the western painted turtle (Chrysemys picta bellii) one of the most widespread, abundant and well-studied turtles in the world, is published this week in Genome Biology. The data show that, like turtles themselves, the rate of genome evolution is extremely slow; turtle genomes evolve at a rate that is about a third that of the human genome and a fifth that of the python, the fastest lineage analyzed.

As a group, turtles are long-lived, can withstand low temperatures including freezing solid, can survive for long periods with no oxygen, and their sex is usually determined by the temperature at which their eggs develop rather than genetically. The painted turtle is most anoxia-tolerant vertebrate and can survive up to four months under water depending on the temperature. Turtles and tortoises are also the most endangered major vertebrate group on earth, with half of all species listed as endangered. This is the first turtle, and only the second non-avian reptile genome to be sequenced, and the analysis reveals some interesting insights about these bizarre features and adaptations, many of which are only known in turtles.

The western painted turtle is a freshwater species, and the most widespread turtle native to North America. Bradley Shaffer and colleagues place the western painted turtle genome into a comparative evolutionary context, showing that turtles are more closely related to birds and crocodilians than to any other vertebrates. They also find 19 genes in the brain and 23 in the heart whose expression is increased in low oxygen conditions including one whose expression changes nearly 130 fold. Further experiments on turtle hatchlings indicated that common microRNA was involved in freeze tolerance adaptation.

This work consistently indicates that common vertebrate regulatory networks, some of which have analogs in human diseases, are often involved in the western painted turtle achieving its extraordinary physiological capacities. The authors argue that the painted turtle may offer important insights into the management of a number of human health disorders, particularly those involved with anoxia and hypothermia.

Contact: Dr. Hilary Glover
BioMed Central

Related biology news :

1. Why getting healthy can seem worse than getting sick
2. Light weights are just as good for building muscle, getting stronger, researchers find
3. Scripps Florida scientists identify neurotranmitters that lead to forgetting
4. University of Tennessee anthropologists find American heads are getting larger
5. Carbon is key for getting algae to pump out more oil
6. Getting to the root -- unearthing the plant-microbe quid pro quo
7. For young birds, getting stressed out can be a good thing
8. Getting (drugs) under your skin
9. Texas cotton getting a genetic tune-up
10. Overweight pregnant women not getting proper weight-gain advice
11. Cheating -- and getting away with it
Post Your Comments:
(Date:10/29/2015)... , Oct. 29, 2015  The J. Craig ... report titled, "DNA Synthesis and Biosecurity: Lessons Learned and ... Department of Health and Human Services guidance for synthetic ... 2010. --> --> ... also has the potential to pose unique biosecurity threats. ...
(Date:10/29/2015)... , Oct. 29, 2015  Rubicon Genomics, Inc., ... U.S. distribution of its DNA library preparation products, ... Rubicon,s new ThruPLEX Plasma-seq kit. ThruPLEX Plasma-seq has ... preparation of NGS libraries for liquid biopsies--the analysis ... and prognostic applications in cancer and other conditions. ...
(Date:10/29/2015)... October 29, 2015 NXTD ... company focused on the growing mobile commerce market ... that StackCommerce, a leading marketplace to discover and ... Wocket® smart wallet on StackSocial for this holiday ... or the "Company"), a biometric authentication company focused ...
Breaking Biology News(10 mins):
(Date:11/30/2015)... (PRWEB) , ... November 30, 2015 , ... Global Stem Cells Group announced ... clinics in the cities of Arica and Iquique in northern Chile. The facilities are part ... offer the most advanced protocols and techniques in stem cell medicine to patients from around ...
(Date:11/30/2015)... /PRNewswire/ - BioAmber Inc. (NYSE: BIOA ), a leader in ... Business Act on Climate Pledge, alongside more than 140 companies ... Obama Administration to demonstrate an ongoing commitment to climate action ... COP21 Paris climate negotiations. ... Canada . --> BioAmber uses biotechnology to ...
(Date:11/30/2015)...  Culprits beware, a University at Albany research ... is taking crime scene fingerprint identification to a ... -->   --> Photo ... --> Halámek and his team ... concept for identifying whether a culprit is male ...
(Date:11/30/2015)... Nov. 30, 2015 /PRNewswire/ - Zenith Epigenetics Corp. ("Zenith" or ... Norman C.W. Wong to its Board of Directors to ... Zenith with a wealth of experience as co-founder of Resverlogix, ... --> --> Dr. Wong ... board of directors. Zenith,s long standing expertise in epigenetics and ...
Breaking Biology Technology: