Navigation Links
Genome of marine organism tells of humans' unicellular ancestors
Date:2/14/2008

hoanoflagellates are not - a situation King hopes will change now that the genome is sequenced.

The cells are egg-shaped with a single long tail or flagellum at one end surrounded at its base by a collar of tentacles - choano comes from the Greek word for collar - that capture bacteria. The flagellum propels the choanoflagellate through the water and also washes bacteria towards the tentacles. Because choanoflagellates resemble the feeding cells of sponges, which are among the most primitive of animals, biologists 165 years ago proposed that these organisms were very distant ancestors of multicelled animals.

King and Rokhsar successfully proposed the choanoflagellate for sequencing several years ago as part of the Department of Energy's Microbial Genome Program, and in the intervening years, King worked on isolating enough uncontaminated DNA for sequencing. The draft genome, completed and annotated in 2007, consists of about 9,200 genes. It is similar in size to the genomes of fungi and diatoms, but much smaller than the genomes of metazoans. Humans, for example, have about 25,000 genes.

Interestingly, the choanoflagellate has nearly as many introns - non-coding regions once referred to as "junk" DNA - in its genes as humans do in their genes, and often in the same spots. Introns have to be snipped out before a gene can be used as a blueprint for a protein and have been associated mostly with higher organisms.

The choanoflagellate genome, like the genomes of many seemingly simple organisms sequenced in recent years, shows a surprising degree of complexity, King said. Many genes involved in the central nervous system of higher organisms, for example, have been found in simple organisms that lack a centralized nervous system.

Likewise, choanoflagellates have five immunoglobulin domains, though they have no immune system; collagen, integrin and cadherin domains, though they have no skeleton or matrix binding cells together;
'/>"/>

Contact: Robert Sanders
rsanders@berkeley.edu
510-643-6998
University of California - Berkeley
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. DOE JGI releases a new version of its metagenome data management and analysis system
2. Washington University increases fleet of Roche Genome Sequencer FLX Systems
3. Tomato pathogen genome may offer clues about bacterial evolution at dawn of agriculture
4. DOE JGI releases soybean genome assembly to enable worldwide bioenergy research efforts
5. Moss genome shows how plants invaded the land and learned to survive heat and drought
6. WUSTL researchers spearhead key genome initiative
7. DOE JGI Community Sequencing Program delivers first moss genome
8. BGSU undergraduates to pilot groundbreaking genome project
9. Latest Integrated Microbial Genomes data management system update release
10. Duke scientists map imprinted genes in human genome
11. University of Toronto scientists map entire yeast genome
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Genome of marine organism tells of humans' unicellular ancestors
(Date:7/9/2015)... Calif. , July 9, 2015  Synaptics Inc. (NASDAQ: ... solutions, announced today that it will report financial results ... Thursday, July 30, 2015 after the close of market. ... analysts and investors at 2:00 p.m. PT (5:00 p.m. ... To participate on the live call, analysts ...
(Date:7/9/2015)... , July 9, 2015  Synaptics Inc. ... of human interface solutions, today announced a ... first fully hardware encapsulated fingerprint sensor and ... technology is literally off the grid, isolating ... matching within the fingerprint sensor to provide ...
(Date:7/8/2015)... DIEGO , July 8, 2015  Trovagene, ... cell-free molecular diagnostics, today announced the launch of ... the Company,s Precision Cancer Monitoring℠ (PCM) technology for ... receiving one or a combination of the novel ... Opdivo® (nivolumab), a PD-1 inhibitor. The 50-patient study ...
Breaking Biology News(10 mins):Synaptics to Report Fourth Quarter, Fiscal Year 2015 Results on July 30 2Synaptics Announces World's First Match-in-Sensor Fingerprint Authentication Technology 2Synaptics Announces World's First Match-in-Sensor Fingerprint Authentication Technology 3Trovagene Initiates Study to Monitor Response to Immunotherapy in Melanoma Patients Using its Precision Cancer Monitoring Platform 2Trovagene Initiates Study to Monitor Response to Immunotherapy in Melanoma Patients Using its Precision Cancer Monitoring Platform 3Trovagene Initiates Study to Monitor Response to Immunotherapy in Melanoma Patients Using its Precision Cancer Monitoring Platform 4
... a prevalent fungal pathogen that causes 10,000 deaths per ... antifungal drugs by duplicating a section of one of ... yeast present in 80 percent of humans, is usually ... oral and vaginal infections (candiasis or thrush) that are ...
... at the Stanford University School of Medicine have taken ... cells that could eventually be transplanted into living organisms. ... surgical resident Oscar Abilez, MD, and colleagues have successfully ... building blocks of blood vessels, after placing them in ...
... technique of distraction has been researched and successfully applied ... with certain medical procedures. The use of distraction is ... psychological element in the perception of pain, with the ... the perception of the pain. , Distraction techniques ...
Cached Biology News:U of M researchers discover genetic key to treating deadly fungal infections 2Stanford doctors advance in bid to turn mice stem cells into blood vessels 2Stanford doctors advance in bid to turn mice stem cells into blood vessels 3Virtual realities against pain 2
(Date:7/27/2015)... ... July 27, 2015 , ... ... solutions, today announced a new video: 3 Ways to GHS Labels . ... Standard and the Globally Harmonized System (GHS) by effectively labeling chemical containers. , ...
(Date:7/27/2015)... ... July 27, 2015 , ... BlueInGreen® ... Monday. The venture will bring the world’s most efficient gas dissolution technology to ... and technologies to both the industrial and municipal markets. With offices located in ...
(Date:7/27/2015)... NEW YORK , July 27, 2015 ... organizations and startups share information and develop new technology ... The Sachs Policy Group (SPG), a leader in health ... members will now engage in a collaborative innovation process ... through the latest trends in public policy, health care ...
(Date:7/26/2015)... Maine (PRWEB) , ... July 26, 2015 , ... ... release of its VALIDATE® ANEMIA calibration verification / linearity test kit. The VALIDATE® ... Each VALIDATE® ANEMIA kit is prepared using the CLSI recommended “equal delta” ...
Breaking Biology Technology:Brady Releases “3 Roads to GHS Labels” Video 2BlueInGreen Brings Water Treatment Technology to Florida 2Junto Health Announces a Unique Partnership with Sachs Policy Group 2Junto Health Announces a Unique Partnership with Sachs Policy Group 3Junto Health Announces a Unique Partnership with Sachs Policy Group 4Maine Standards Company, LLC Announces Release of VALIDATE® ANEMIA Calibration Verification / Linearity Test Kit 2
... Advocacy Groups Launch Joint Effort to Preserve Eyesight of,Millions At-Risk ... that eye exams are being,ignored by many aged over 40. ... the last year to have their eyes checked, even though,twice ... or early,death. The survey showed that awareness of glaucoma was ...
... CRVL ), a leading provider of workers, ... 150,000 facility and,provider locations to its national CorCare ... provider network additions are the,result of a new ... Petersburg, FL. With more than 5,500 hospitals ...
... Time-Saving, ATLANTA, Oct. 1 Harmonex ... a revolutionary software platform,designed to assess children, ... CliniCom(TM), an intuitive, computer assisted intake and ... settings, gathers information,directly from patients and their ...
Cached Biology Technology:International Survey Shows People Over Forty Ignore Risk of Blindness 2International Survey Shows People Over Forty Ignore Risk of Blindness 3International Survey Shows People Over Forty Ignore Risk of Blindness 4International Survey Shows People Over Forty Ignore Risk of Blindness 5CorVel Corporation Medical Provider Network Adds New Providers to Increase Savings and Improve Access to Care 2CorVel Corporation Medical Provider Network Adds New Providers to Increase Savings and Improve Access to Care 3Harmonex Introduces CliniCom(TM), a Breakthrough in Psychiatric Intake and Assessment Technology 2Harmonex Introduces CliniCom(TM), a Breakthrough in Psychiatric Intake and Assessment Technology 3
Sphingosine 1-phosphate receptor Edg-1...
Bag-1 (K-20)...
... atoms at the 3, 3', 4, and ... as an internal standard for the quantification ... LC-mass spectrometry. PGE2 is one of the ... one of the most widely investigated prostaglandins. ...
, Glycerol 30%...
Biology Products: