Navigation Links
Elephant shark genome sequence leads to discovery of color perception in deep-sea fish
Date:3/17/2009

The elephant shark, a primitive deep-sea fish that belongs to the oldest living family of jawed vertebrates, can see color much like humans can.

This discovery, published in the March 2009 issue of Genome Research, may enhance scientists' understanding of how color vision evolved in early vertebrates over the last 450 million years of evolution.

"It was unexpected that a 'primitive' vertebrate like the elephant shark had the potential for color vision like humans. The discovery shows that it has acquired the traits for color vision during evolution in parallel with humans," said Byrappa Venkatesh, Ph.D., who with David Hunt, Ph.D., headed the research team responsible for this surprising discovery.

Dr. Venkatesh is a scientist at Singapore's Institute of Molecular and Cell Biology (IMCB), while Dr. Hunt is based at the Institute of Ophthalmology at University College London (UCL).

The research team found that the elephant shark had three cone pigments for color vision and, like humans, it accomplished this through gene duplication.

Dr. Venkatesh said that the finding underscores the research utility of the elephant shark, which IMCB scientists proposed in 2005 as a valuable reference genome to understand the human genome.

In a separate paper titled, "Large number of ultraconserved elements were already present in the jawed vertebrate ancestor," published in the journal Molecular Biology and Evolution in March 2009, the research team reported that they had discovered that the protein sequences in elephant shark were evolving at a slower rate than in other vertebrates.

This finding indicates that the elephant shark had retained more features of the ancestral genome than other vertebrates belonging to the same evolutionary tree and hence was a useful model for gaining insight into the ancestral genome, in which the human genome also has its roots.

In several scientific publications, Dr. Venkatesh's team has described research showing that the human DNA sequence was more similar to elephant shark than to any other fish.

Dr. Venkatesh added, "We expect the sequencing of the whole genome of the elephant shark to be completed by early 2010, the availability of which will then enable scientists to explore the important functional elements in both the human and elephant shark genome that have remained unchanged during the last 450 million years of evolution."

The findings reported in Genome Research and Molecular Biology and Evolution were generated less than two years after IMCB secured National Institutes of Health funding to sequence the whole genome of the elephant shark.


'/>"/>

Contact: sciencematter@yahoo.com
sciencematter@yahoo.com
858-243-1814
Agency for Science, Technology and Research (A*STAR), Singapore
Source:Eurekalert

Related biology news :

1. Male elephants get photo IDs from scientists
2. Elephantnose fish see with their chin
3. Social standing influences elephant movement
4. Elephant engineers
5. Scientists discover new species of giant elephant-shrew
6. Ivory poaching at critical levels: Elephants on path to extinction by 2020?
7. Scientists find elephant memories may hold key to survival
8. Missing: 2,000 elephants
9. Conquest of land began in shark genome
10. Photo-monitoring whale sharks
11. Human deaths from shark attacks hit 20-year low last year
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/3/2016)... , March 3, 2016  FlexTech, a SEMI ... categories of Innovation, Research & Development, Leadership in Education, ... This is the 9 th year of the ... of companies and individuals from past years . ... on a pre-described set of criteria, by a panel ...
(Date:3/2/2016)... March 2, 2016 ... addition of the  "Global Biometrics Market in ... ,     (Logo: http://photos.prnewswire.com/prnh/20130307/600769) , , Global biometrics ... at a CAGR of around 27%   ... has announced the addition of the  "Global ...
(Date:3/1/2016)... 1, 2016  (RSAC Booth #3041) – True fraud ... $118 billion is lost to false positives, where good ... fraud detection. At the RSA Conference 2016, NuData Security is ... handle authentication by devaluing the data fraudsters have in ... --> --> Cheap ...
Breaking Biology News(10 mins):
(Date:4/29/2016)... ... ... Intelligent Implant Systems announced today that the two-level components for the Revolution™ Spinal System ... These components expand the capabilities of the system and allow Revolution™ to be utilized ... the company has seen significant sales growth in 1Q 2016, and the system is ...
(Date:4/28/2016)... 28, 2016 The report "Cryocooler ... Cryocoolers), Service (Technical Support, Product Repairs & Refurbishment, Preventive ... Forecast to 2022", published by MarketsandMarkets, the global market ... 2022, at a CAGR of 7.29% between 2016 and ... and 94 Figures spread through 159 Pages and in-depth ...
(Date:4/28/2016)... Conn. (PRWEB) , ... April 28, 2016 , ... ... financing and ongoing support for Connecticut's innovative, growing companies, today announced the launch ... health and financial technology (fintech) companies. , “VentureClash looks to attract ...
(Date:4/28/2016)... ... April 28, 2016 , ... As part of ... industry experts, and expanding its LATAM network and logistics capabilities. Enhancements have ... manage their clinical trial projects. , The expansion will provide unmatched clinical trial ...
Breaking Biology Technology: