Navigation Links
Discovery places turtles next to lizards on family tree
Date:7/25/2011

BAR HARBOR − Famous for their sluggishness, turtles have been slow to give up the secrets of their evolution and place on the evolutionary tree. For decades, paleontologists who study fossils and molecular biologists who study genetics have disagreed about whether turtles are more closely related to birds and crocodiles or to lizards. Now, two scientists from the Mount Desert Island Biological Laboratory in Bar Harbor, Maine, and their colleagues from Dartmouth College and Harvard and Yale Universities have developed a new technique for classifying animals, and the secret is out. Turtles are closer kin to lizards than crocodiles.

To reach their conclusion, published in Nature News and Biology Letters, the research team looked at a newly discovered class of molecules called microRNA. Most of the genetic material or DNA that scientists study provides the code for building proteins, large molecules that form an essential part of every organism. But microRNAs are much smaller molecules that can switch genes on and off and regulate protein production. They are also remarkably similar within related animal groups and provide important clues for identification.

"Different microRNAs develop fairly rapidly in different animal species over time, but once developed, they then remain virtually unchanged," said Kevin Peterson, a paleobiologist at MDIBL and Dartmouth College. "They provide a kind of molecular map that allows us to trace a species' evolution."

Peterson worked with Ben King, a bioinformatician at MDIBL. "My role in the study was to enhance our software so we could find new and unique microRNAs in the lizard genome," King said. "We identified 77 new microRNA families, and four of these turned out to also be expressed in the painted turtle. So we had the evidence we needed to say that turtles are a sister group to lizards and not crocodiles."

Though few creatures have been as puzzling as the turtle, the research team plans to use its microRNA analysis on other animals to help determine their origins and relationships as well. It is also developing a web-based platform to share the software with other researchers around the world.


'/>"/>

Contact: Jerilyn Bowers
jeri@mdibl.org
207-288-3147
Mount Desert Island Biological Laboratory
Source:Eurekalert

Related biology news :

1. Chemical equator discovery will aid pollution mapping
2. Sirtris review of sirtuin therapeutics for diseases of aging in Nature Reviews Drug Discovery
3. Groundbreaking discovery may lead to stronger antibiotics
4. Discovery of natural compounds that could slow blood vessel growth
5. Nanoscopic screening process to speed drug discovery
6. FSU researchers discovery leads to $1.5 million grant, potential new treatment of liver fibrosis
7. New $11 million center to speed production of new compounds for drug discovery
8. Discovery of giant roaming deep sea protist provides new perspective on animal evolution
9. New discovery may enhance MRI scans, lead to portable MRI machines
10. Kidney function discovery sheds light on genetic complexity of disease
11. Discovery of new gene associated with diabetes risk suggests link with body clock
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/11/2017)... 2017 Research and Markets has announced the ... to their offering. ... eye tracking market to grow at a CAGR of 30.37% during ... Market 2017-2021, has been prepared based on an in-depth market analysis ... and its growth prospects over the coming years. The report also ...
(Date:4/6/2017)... 2017 Forecasts by Product Type ... by End-Use (Transportation & Logistics, Government & Public Sector, ... Fossil Generation Facility, Nuclear Power), Industrial, Retail, Business Organisation ... Are you looking for a definitive report on the ... ...
(Date:4/5/2017)... -- KEY FINDINGS The global market for ... of 25.76% during the forecast period of 2017-2025. The ... the growth of the stem cell market. ... INSIGHTS The global stem cell market is segmented on ... stem cell market of the product is segmented into ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... ... Lithuania, announced today that they have entered into a multiyear collaboration to identify ... CRISPR researchers with additional tools for gene editing across all applications. , Under ...
(Date:10/12/2017)... ... October 12, 2017 , ... BioMedGPS announces ... addition of its newest module, US Hemostats & Sealants. , SmartTRAK’s US Market ... hemostats, fibrin sealants, synthetic sealants and biologic sealants used in surgical applications. BioMedGPS ...
(Date:10/12/2017)... , ... October 12, 2017 ... ... has launched Rosalind™, the first-ever genomics analysis platform specifically designed for life ... Named in honor of pioneering researcher Rosalind Franklin, who made a major ...
(Date:10/11/2017)... ... October 11, 2017 , ... The CRISPR-Cas9 ... overexpression experiments and avoiding the use of exogenous expression plasmids. The simplicity of ... performing systematic gain-of-function studies. , This complement to loss-of-function studies, such as ...
Breaking Biology Technology: