HOME >> BIOLOGY >> NEWS
Microbe genes help scientists reconstruct animal origins

MADISON, Wis., Dec. 17 - Without the help of fossils or any other record from the distant past, scientists have identified what they believe represents a common ancestor of all animals on Earth, a microscopic organism with key genetic traits that, until now, have been found only in true animals.

Writing in the Dec. 18 Proceedings of the National Academy of Sciences, a team of scientists from the Howard Hughes Medical Institute at the University of Wisconsin-Madison reports the discovery of a key cell communication gene in modern, single-celled microbes known as choanoflagellates.

Long suspected to be close relatives of animals, choanoflagellates have a lineage that dates to more than 600 million years ago, the time when animals - multicellular organisms with distinct body plans and systems of organs -are believed to have evolved in the ancient stew of microscopic protozoan life

Ancient microbes eventually gave rise not only to animals, but also plants, fungi, bacteria, and other living things, each going their separate ways to make up the tree of life as we know it today. The evolution of multicellular animals from a unicellular protozoan ancestor has long been recognized as a pivotal transition in the history of life.

"The question is, who were the ancestors of animals and what genetic tools did they pass down to the original animals," says Sean B. Carroll, a UW-Madison professor of genetics and the senior author of the PNAS study. "This is a difficult question to answer because the events are completely invisible in the fossil record."

Choanoflagellates represent an order of transparent, single-celled microbes that propel themselves with whiplike appendages. They exist in many forms today and, like animals, their lineage stretches back hundreds of millions of years ago to the mix of microscopic life that first evolved on Earth.

"Choanoflagellates thrive today and are the closest non-animal organisms to animals.
'"/>

Contact: Sean B. Carroll
sbcarrol@facstaff.wisc.edu
608-262-6191
University of Wisconsin-Madison
17-Dec-2001


Page: 1 2 3

Related biology news :

1. Microbes eat their way to better concrete
2. Microbes found in Mayan ruins may deteriorate stone from inside out
3. Microbes trick provides a template for willowy crystals
4. Microbes active in Colorado snows fuel tundra ecosystem
5. Microbe from depths takes life to hottest known limit
6. Microbes blueprints promise insights into oceans, more
7. Microbes related to infant lung infections reduced using specialized ventilation system device
8. Microbe first to break down PCBs
9. Microbes and the dust they ride in on pose potential health risks
10. "Microbes deep within South African gold mines" subject of NSF lecture
11. Microbes make mine-waste drinkable, Science researchers report

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Microbe genes help scientists reconstruct animal origins

(Date:11/18/2014)... Nov. 17, 2014   News ... collaborate to develop The Partners Data Lake, an ... Partners Data Lake will allow researcher and clinicians ... treatment and the lives of patients , ... clinical activities across the Partners system, breaking down ...
(Date:11/18/2014)... NEW YORK , Nov. 18, 2014 /PRNewswire/ ... iris-based identity authentication solutions, and MorphoTrust USA ... solutions and services, today announced a strategic partnership ... across enterprise, motor vehicle administration (MVA), airport screening ... leader in identity-related solutions, MorphoTrust serves consumers through ...
(Date:11/12/2014)... 2014 Crossmatch™, a leading provider of biometric ... fingerprint readers have been deployed throughout Montparnasse Pasteleria, ... Mexico . The bakery chain implemented the Crossmatch ... caused by employees clocking in for each other. ... Montparnasse relied on paper timecards and a mechanical time ...
Breaking Biology News(10 mins):Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 2Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 3Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 4Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 5EyeLock, MorphoTrust Form Strategic Partnership to Pursue Commercial Enterprise Deployments 2EyeLock, MorphoTrust Form Strategic Partnership to Pursue Commercial Enterprise Deployments 3Montparnasse Pasteleria Achieves Time and Attendance Transparency with Crossmatch U.are.U Fingerprint Readers 2
(Date:11/18/2014)... 17, 2014 Athena Signature Series: Turning Cancer ... Beverly Emerson, a professor in the Regulatory Biology Laboratory at ... recent discovery points to an “off switch” for drug resistance ... how her local research is making a global impact in ... and then join host Cheryl K. Goodman, CEO of Social ...
(Date:11/18/2014)... Array Architects is proud of a ... the nation's hospitals and health systems. It is a ... their careers to the advancement of both the healthcare ... respective field, Laura Silvoy has been chosen to share ... Simulation Conference. , Laura will present her Process ...
(Date:11/17/2014)... November 17, 2014 The new ... Weights " describes the challenges of becoming the ... accredited status for calibration weights in the microgram ... weight manufacturers and any scientists involved in nanotechnology ... design, handling, manufacturing and calibration of weights in ...
(Date:11/15/2014)... New York, NY (PRWEB) November 14, 2014 ... expansion plan, QuickSTAT is making significant investments in ... evolving world of modern cold chain and the ... will support QuickSTAT’s ongoing focus on customized logistics ... Towers and enhancement of existing facilities. There will ...
Breaking Biology Technology:Array Healthcare Simulation Expert Slated to Speak at Winter Simulation Conference 2New White Paper on Microgram Weights Describes How to Achieve Traceable Measurement Down to 0.05 Milligrams 2QuickSTAT Announces Global Expansion Plan to Enhance Its Global Network and Cold Chain Logistics Capabilities for Life Sciences 2
Cached News: