Navigation Links
Introns: A mystery renewed
Date:12/10/2009

BLOOMINGTON, Ind. -- The sequences of nonsense DNA that interrupt genes could be far more important to the evolution of genomes than previously thought, according to a recent Science report by Indiana University Bloomington and University of New Hampshire biologists.

Their study of the model organism Daphnia pulex (water flea) is the first to demonstrate the colonization of a single lineage by "introns," as the interrupting sequences are known. The scientists say introns are inserted into the genome far more frequently than current models predict. The scientists also found what appear to be "hot spots" for intron insertion -- areas of the genome where repeated insertions are more likely to occur. And surprisingly, the vast majority of intron DNA sequences the scientists examined were of unknown origin.

"The thinking has been that these insertion events are very rare because they always have bad effects," said postdoctoral fellow Abraham Tucker, a lead author of the Science paper.

Graduate student Wenli Li, whose participation in the research overlaps her dissertation work, was the paper's co-lead author. Li said she was particularly interested in the notion of hot spots that make it more likely for separate lineages of Daphnia to gain introns in the same place (or the same general area) within the water fleas' genomes. Four of the 23 different kinds of introns the scientists found were not unique with respect to position. If introns were always inserted in random places within genes, the scientists would have expected zero introns to have identical insertion points.

"The most intriguing finding for me is the multiple instances of parallel intron gains, because this means that Daphnia is in an active phase of intron proliferation," Li said. "This makes Daphnia an extraordinary system to study intron evolution. In addition, we believe our work facilitates a more accurate estimate of intron
'/>"/>

Contact: David Bricker
brickerd@indiana.edu
812-856-9035
Indiana University
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Scientists are first to unlock the mystery of creating cultured pearls from the queen conch
2. Mystery solved: Marine microbe is source of rare nutrient
3. Baylor researchers unravel mystery of DNA conformation
4. Mystery E. coli genes essential for survival of many species
5. Mystery of bat with an extraordinary nose solved
6. Harvard scientists solve mystery about why HIV patients are more susceptible to TB infection
7. Scientists tackle the mystery of white-nose syndrome in bats
8. Scientists unravel the mystery of white-nose syndrome
9. Research team wins funds to unravel a DNA mystery
10. Genetic sleuth solves glaucoma mystery
11. Life secret exposed: Scientists unlock mystery of molecular machine
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Introns: A mystery renewed
(Date:9/18/2014)... can operate inside the bore of an MRI scanner ... research partnership program at Brigham and Women,s Hospital in ... in conjunction with real-time MRI images, can make prostate ... discomforting for the patient. The novel system also has ... precision. , Developed by a team of robotics engineers ...
(Date:9/18/2014)... spoken language is unique to humans. "The genetic changes ... human evolution to make this possible are largely unknown, ... have," says Wolfgang Enard, Professor of Anthropology and Human ... molecular biological basis of language Enard has now taken ... study, undertaken in collaboration with scientists at several universities, ...
(Date:9/18/2014)... happy-go-lucky characters, so you might expect that most would ... fact some dogs are distinctly more pessimistic than others, ... "This research is exciting because it measures positive and ... offers researchers and dog owners an insight into the ... Melissa Starling, from the Faculty of Veterinary Science. Her ...
Breaking Biology News(10 mins):Trial begins for MRI-compatible robot designed to improve accuracy of prostate biopsies 2Trial begins for MRI-compatible robot designed to improve accuracy of prostate biopsies 3Trial begins for MRI-compatible robot designed to improve accuracy of prostate biopsies 4Trial begins for MRI-compatible robot designed to improve accuracy of prostate biopsies 5Language evolution: Quicker on the uptake 2Language evolution: Quicker on the uptake 3Dogs can be pessimists too 2Dogs can be pessimists too 3
... in medical diagnostics could be minutes particles of rust, ... is formed, silicon dioxide. These magnetic nanoparticles, a mere ... used to trap antibodies to the virus that causes ... lethal diarrhea. According to scientists in Vietnam, it ...
... A large-scale UC Davis experiment with ants, lizards ... predicting the effects of environmental change on complex natural ... was led by UC Davis ecologist Jonah Piovia-Scott, is ... . Piovia-Scott said previous studies have found that ...
... maternal essential fatty acid deficiency impact on its progeny ... has been implicated in many disorders. Researchers from Inserm ... studied mice fed on a diet low in omega-3 ... had deleterious consequences on synaptic functions and emotional behaviours. ...
Cached Biology News:Detecting lethal diseases with rust and sand 2A deficiency of dietary omega-3 may explain depressive behaviors 2
(Date:9/19/2014)... September 18, 2014 Scientists at NYU Langone Medical ... the efficiency of the process for turning adult cells ... compounds, including vitamin C. Using the new technique in ... obtained from adult skin cells by more than 20-fold ... is efficient and reliable, and thus should generally accelerate ...
(Date:9/19/2014)... NEW YORK , Sept. 19, 2014  An ... common forms of inherited neuropathies – Charcot-Marie-Tooth disease (CMT) ... feet and legs, causing extreme muscle atrophy, weakness, and ... in the US and millions worldwide. CMT is a ... use of their legs, requiring mobility devices such as ...
(Date:9/19/2014)... 2014 Pfenex Inc. (NYSE MKT: PFNX), a ... and difficult to manufacture proteins including biosimilar therapeutics, today ... st Annual NewsMakers in the Biotech Industry conference ... Liang , chief executive officer of Pfenex, will provide ... strategy on Friday, September 26, 2014 at 10:00 a.m. ...
(Date:9/19/2014)... Minnesota (PRWEB) September 19, 2014 ... related food industries will gather October 5–8, 2014, ... the Rhode Island Convention Center in Providence, Rhode ... feature the work of food scientists, chemists, microbiologists, ... control, and food production management. To date, 1,000 ...
Breaking Biology Technology:NYU Langone scientists report reliable and highly efficient method for making stem cells 2NYU Langone scientists report reliable and highly efficient method for making stem cells 3September is Charcot-Marie-Tooth (CMT) Awareness Month - Scheduled events, activities and important partnerships announced throughout the month! 2Pfenex to Present at Upcoming Industry Conference on September 26 2Latest Research on Cereal Grain Quality, Health Benefits and Food Production to be Presented During the AACC International Annual Meeting 2Latest Research on Cereal Grain Quality, Health Benefits and Food Production to be Presented During the AACC International Annual Meeting 3
... YORK, July 8 Concentric Pharma Advertising, ... the fastest growing in the,field, has been ... communications supporting a developmental once-daily,medication for the ... assignment will include a broad range of ...
... From toothpaste to technology, noncrystalline or amorphous silica is ... we use in our daily lives. As a minor, ... silica reactivity in physiological environments is crucial to the ... bone-like properties. , One ongoing question is why solutions ...
... Inc. (Nasdaq:,FVRL) today announced that it has come ... Capital Corporation and Oxford Financial,Corporation (Lenders). The agreement ... approximately $8.8 million as repayment of,the outstanding principal, ... was triggered when the Company,s cash fell below ...
Cached Biology Technology:Concentric Wins Full-Service Professional Assignment From Biopharm Innovator Neuromed 2New insight to demineralization 2Favrille Announces Resolution of Debt Obligations and Plans for Maximizing Assets 2Favrille Announces Resolution of Debt Obligations and Plans for Maximizing Assets 3
Bovine Coronary Artery Smooth Muscle Cells (BCASMC) (>500,000 cells)...
RECK (F-20)...
The improved design and new mechanical solutions of Finnpipette Focus Multichannel Plus improves accuracy and precision.In these low volume multichannel pipettes, the super blow-out function ensures ...
NAK/TBK1 (CT) Affinity Purified Polyclonal Antibody...
Biology Products: