Navigation Links
Scientists isolate new antifreeze molecule in Alaska beetle
Date:12/14/2009

FAIRBANKS, AlaskaScientists have identified a novel antifreeze molecule in a freeze-tolerant Alaska beetle able to survive temperatures below minus 100 degrees Fahrenheit. Unlike all previously described biological antifreezes that contain protein, this new molecule, called xylomannan, has little or no protein. It is composed of a sugar and a fatty acid and may exist in new places within the cells of organisms.

"The most exciting part of this discovery is that this molecule is a whole new kind of antifreeze that may work in a different location of the cell and in a different way," said zoophysiologist Brian Barnes, director of the University of Alaska Fairbanks Institute of Arctic Biology and one of five scientists who participated in the Alaska Upis ceramboides beetle project.

Just as ice crystals form over ice cream left too long in a freezer, ice crystals in an insect or other organism can draw so much water out of the organism's cells that those cells die. Antifreeze molecules function to keep small ice crystals small or to prevent ice crystals from forming at all. They may help freeze-tolerant organisms survive by preventing freezing from penetrating into cells, a lethal condition. Other insects use these molecules to resist freezing by supercooling when they lower their body temperature below the freezing point without becoming solid.

UAF graduate student and project collaborator Todd Sformo found that the Alaska Upis beetle, which has no common name, first freezes at about minus 18.5 degrees Fahrenheit in the lab and survives temperatures down to about 104 degrees below zero Fahrenheit.

"It seems paradoxical that we find an antifreeze molecule in an organism that wants to freeze and that's adapted to freezing," said Barnes, whose research group is involved in locating insects, determining their strategies of overwintering and identifying the mechanisms that help them get through the winter

A possible advantage of this novel molecule comes from it having the same fatty acid that cells membranes do. This similarity, says Barnes, may allow the molecule to become part of a cell wall and protect the cell from internal ice crystal formation. Antifreeze molecules made of proteins may not fit into cell membranes.

"There are many difficult studies ahead," said Barnes. "To find out how common this biologic antifreeze is and how it actually prevents freezing and where exactly it's located."


'/>"/>

Contact: Marie Gilbert
megilbert@alaska.edu
907-474-7412
University of Alaska Fairbanks
Source:Eurekalert

Related biology news :

1. UK scientists working to help cut ID theft
2. Scientists show that mitochondrial DNA variants are linked to risk factors for type 2 diabetes
3. Comet probes reveal evidence of origin of life, scientists claim
4. Scientists link fragile X tremor/ataxia syndrome to binding protein in RNA
5. Male elephants get photo IDs from scientists
6. Scientists retrace evolution with first atomic structure of an ancient protein
7. Muscle mass: Scientists identify novel mode of transcriptional regulation during myogenesis
8. Carnegie Mellon scientists develop nanogels that enable controlled delivery of carbohydrate drugs
9. Clemson scientists shed light on molecules in living cells
10. Scientists tackle mystery mountain illness
11. T. rex quicker than Becks, say scientists
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/29/2016)... 2016   Neurotechnology , a provider ... technologies, today released FingerCell 3.0, a software ... that run on low-power, low-memory microcontrollers. FingerCell ... than 128KB of memory, enabling it to ... limited on-board resources, such as: mobile phones, ...
(Date:11/22/2016)... 2016 According to the new market research report ... Vein, Signature, Voice), Multi-Factor), Component (Hardware and Software), Function (Contact and Non-contact), ... market is expected to grow from USD 10.74 Billion in 2015 to ... 2016 and 2022. Continue Reading ... ...
(Date:11/17/2016)... , Nov. 17, 2016 Global Market Watch: ... Biobanks (Disease-Based Banks, Population-Based Banks and Academics) market is to ... for Private Biobanks shows the highest Compounded Annual Growth Rate ... region during the analysis period 2014-2020. North ... of 9.95% followed by Europe at ...
Breaking Biology News(10 mins):
(Date:12/8/2016)... OXFORD, England , December 8, 2016 /PRNewswire/ ... (OGT), das Unternehmen für Molekulargenetik, erweitert seine Palette ... SureSeq myPanel™ NGS Custom FH Panels, das ein ... Hypercholesterinämie (FH) ermöglicht. Das Panel bietet eine Erkennung ... Number Variations (CNV) mit einem einzigen kleinen Panel ...
(Date:12/8/2016)... ... December 08, 2016 , ... KBioBox ... response to client demand KbioBox developed a sophisticated “3 click” gene dditing off ... accessible from KBioBox’s new website, https://www.kbiobox.com/ and powered by the ...
(Date:12/8/2016)... ... ... This CAST literature review and report looks at problems caused by the current ... in countries that are major global commodity exporters and importers, which show that asynchrony ... level presence (LLP) puts large volumes of trade worth billions of dollars at risk. ...
(Date:12/8/2016)... TAMPA, Fla. , Dec. 8, 2016 /PRNewswire/ ... biopharmaceutical company that discovers, develops and plans to ... today that its shares of common stock were approved ... stock will begin trading on the OTCQX, effective ... To qualify for the OTCQX market, companies must ...
Breaking Biology Technology: