Navigation Links
Same-Sex Mating Discovered in a Toxic Fungus

"mating type loci," genes arranged contiguously, but which typically do not span an entire chromosome. C. neoformans exists in two mating types, a and alpha, determined by a single genetic region, or locus.

Most fungal isolates taken from people infected by C. neoformans are of the alpha mating type, said study lead author and post-doctoral fellow Xiaorong Lin, Ph.D., also of Duke.

"Organisms, including fungi, usually exist in an approximately one-to-one sex ratio," Lin said. "Yet in Cryptococcus neoformans, one mating type predominates, leaving them with apparently few chances to mate. It's been a mystery."

In 1996, another group discovered that those alpha isolates could undergo fruiting and produce spores, a process that resembles sexual reproduction. However, researchers thought that the unisexual fruiting occurred strictly through the asexual division of cells into identical clones, Heitman said.

That left scientists with a conundrum. C. neoformans has a defined sexual cycle involving both mating types. "Yet, how can sexual reproductive potential be maintained in an organism with a largely unisexual population structure?" Heitman asked. "The fruiting of alpha strains provided a clue."

In their laboratory experiments, the researchers found that, rather than being an asexual process, the hallmarks of mating occur during fruiting of alpha isolates. Unisexual fruiting involves the fusion of cells followed by meiosis, enabling genetic exchange between members of the same sex, they reported.

Meiosis is the process whereby cells divide into two "haploid" cells, each with half the number of chromosomes. Unlike diploid animals and plants, C. neoformans normal state is haploid, Heitman explained.

Furthermore, the team showed, strains lacking components required for mating -- including pheromones, pheromone receptors and other genes with known roles in mating -- exhibited a defect in fruiting.

The newly descr
'"/>

Source:DukeMedNews


Page: 1 2 3

Related biology news :

1. Sexual cooperation: Mating increases longevity in ant queens
2. The price of vanity: Mating with showy males may reduce offsprings ability to fight off pathogens
3. Newly Discovered Compound Blocks Known Cancer-Causing Protein
4. A New Species of Monkey is Discovered in Tanzania: The First in Africa for More Than 20 Years
5. Newly Discovered Branding Process Helps Immune System Cells Pick Their Fights
6. New Species of Coral Discovered Off Southern California
7. Newly Discovered Role for Heart Response Enzyme May Yield Better Heart Failure Therapy
8. Solution to Pollution: New Bacteria Eats Toxic Waste
9. Duke Chemists Isolating Individual Molecules Of Toxic Protein In Alzheimers, Parkinsons Disease
10. Toxic flood lifts lid on common urban pollution problem
11. Toxic molecule may cause most common type of muscular dystrophy
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Same Sex Mating Discovered Toxic Fungus

(Date:1/22/2015)... POINT ROBERTS, Washington , January 20, 2015 ... technology and tech stocks, releases video from the CES 2015 ... security consultant Apollo Robbins . Apollo shows ... Wocket™ biometric smart wallet, a product of NXT-ID, Inc. (NASDAQ: ...
(Date:1/22/2015)... 2015 Infinisource has launched its new NXG series of ... G2 sets a higher standard for collecting attendance and labor ... With plug-and-play installation, touch screen interface and seamless connection to ... time collection solution for the small to mid-size employer. ...
(Date:12/19/2014)... Dec. 18, 2014 Research and Markets ( ... "iPhone 5S Fingerprint Sensor - Apple/AuthenTec TMDR92 & Sapphire ... http://photos.prnewswire.com/prnh/20130307/600769 Following ... the fingerprint reading feature with the iPhone 5S. It ...
Breaking Biology News(10 mins):Apollo Robbins Talks about the Illusion of Personal Safety and How Easily Your Wallet is Stolen; If a Wocket Wallet is Stolen the Thief Can't do Anything With it! 2Apollo Robbins Talks about the Illusion of Personal Safety and How Easily Your Wallet is Stolen; If a Wocket Wallet is Stolen the Thief Can't do Anything With it! 3Infinisource's NXG series sets new time clock standard 2iPhone 5S Fingerprint Sensor - Apple/AuthenTec TMDR92 & Sapphire - Technology Report 2
... The AGA Research Foundation is honored to announce ... in Digestive Cancer, which will support Andrew D. Rhim, ... University of Pennsylvania, Philadelphia, as he furthers his research ... and cancer progression. "The AGA Research Foundation is ...
... Orlando, FL (May 18, 2013) Research presented at ... digestive health through diet and lifestyle. Individuals ... muscle strength, fatigue and poor quality of life. These ... A randomized, double blind, placebo-controlled study found for the ...
... 18, 2013) The AGA Research Foundation announced a ... relationship between the gut microbiota, one of today,s most ... The AGA Research Awards Panel selected Andrew ... General Hospital and Harvard Medical School, Boston, as the ...
Cached Biology News:AGA Research Foundation grant furthers digestive cancer research 2Research examines new methods for managing digestive health 2Research examines new methods for managing digestive health 3New gut microbiome research to explore red meat -- colorectal cancer pathway 2
(Date:12/24/2014)... and NEW YORK , Dec. 24, 2014 ... advancing patient care in critical areas, announced the closing of ... and warrants to purchase up to an aggregate 3,500,000 shares ... share and $.01 per warrant.  The warrants have a per ...
(Date:12/24/2014)... BOTHELL, Wash. , Dec. 24, 2014   BioLife Solutions ... manufacturer and marketer of proprietary clinical grade hypothermic storage ... thermal shipping products for cells and tissues  ("BioLife" or ... Annual Meeting of Stockholders on May 4, 2015 (the "Annual ...
(Date:12/24/2014)... (PRWEB) December 23, 2014 GMO corn cases ... Syngenta, are in the process of being consolidated in a ... In Re: Syngenta AG MIR 162 Corn Litigation, MDL No. ... Kansas. , Management of the Syngenta GMO corn multidistrict litigation ...
(Date:12/24/2014)... 2014 SoundConnect’s 2015 ... cutting edge communication technology, provide continued education and ... webinar series demonstrates online communication features and benefits; ... conferencing’s most innovative and powerful tools. , According ...
Breaking Biology Technology:PlasmaTech Biopharmaceuticals, Inc. Announces Closing of Public Offering 2PlasmaTech Biopharmaceuticals, Inc. Announces Closing of Public Offering 3BioLife Solutions Sets Date for Annual Meeting of Stockholders 2Carey Danis & Lowe Reports on Syngenta GMO Corn Transfer Order 2SoundConnect Launches Leading Edge Business Communications Webinar Series 2SoundConnect Launches Leading Edge Business Communications Webinar Series 3
... ROCKVILLE, Md., Aug. 24 /PRNewswire / --OriGene Technologies, ... representing the most comprehensive offering of human cell-produced human ... are purified from HEK293 cells transiently transfected with TrueORF ... to other expression systems in that it produces proteins ...
... BOZEN, Italy, August 24 Health ... recent partnership announcement with McKesson, it,has received categorical ... American,customers in just a few days since the ... prevent them from publicly,commenting on industry events, a ...
... SAN DIEGO, Aug. 24 Orexigen((R)) Therapeutics, Inc. (Nasdaq: ... joined the Company as Chief Commercial Officer. Mr. Booth ... to Orexigen. Most recently he served as President of ... commercial, medical and scientific affairs, business development and all support ...
Cached Biology Technology:Health Robotics Receives Overwhelming Support from its Customers for its McKesson-CytoCare Partnership 2Health Robotics Receives Overwhelming Support from its Customers for its McKesson-CytoCare Partnership 3Health Robotics Receives Overwhelming Support from its Customers for its McKesson-CytoCare Partnership 4Orexigen(R) Therapeutics Appoints Mark Booth Chief Commercial Officer 2
IKKbeta/IKK-2 Polyclonal Antibody 100 ug affinity purified rabbit polyclonal antibody. Reacts with human. Tested in Western blotting....
...
Request Info...
... The S.c. EasyComp Transformation Kit is ... Saccharomyces cerevisiae cells. Advantages over commonly ... formation or LiCl methods include:- Cells can ... 30 minutes - Competent cell preparation and ...
Biology Products: