Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Researcher studies gene families to explore diversity and evolution

02.08.2006
Theoretical biologist Stephen Proulx studies gene families to explore how genomes become diverse and evolve.

The Iowa State University assistant professor uses mathematical tools and computer models to determine how environmental and evolutionary factors -- like seasonal change, migration and sexual preference -- structure a genome.

One path to diversity in a genome involves the proliferation of genes into multi-gene families.

"The growth of a gene family can occur through rare errors in DNA replication," Proulx said. "Sometimes in error, a single gene is duplicated on a chromosome, and the duplicated copy can emerge as a new functional gene. Although that gene may have a new function, it's not fundamentally different from the original gene."

Proulx wants to be able to explain that process. "We also want to know if changing the size of gene families is a way by which an organism becomes more complex," he said.

In a recent paper published in the journal Evolution, Proulx and colleague Patrick Phillips, professor, University of Oregon, Eugene, show that the process of gene family expansion can begin even before a gene is duplicated. The first step in the process involves specialization of different variants of a gene that can then take on different functions once the gene is duplicated by chance.

The article was recently featured as a "Hidden Jewel" on the Faculty of 1000 Web site, a journal review site that posts expert opinions on current research papers. Proulx thinks it has generated considerable interest in the biological community because it shows how the process of adaptation can play a role in generating organismal complexity.

Proulx's model calculates the exact conditions under which evolutionary pressures cause genes to diverge.

"One of the things I'm trying to do is provide an ecological and environmental context for genome evolution," he said. "And what I continue to see is that these ecological factors can play a really large role."

Stephen Proulx | EurekAlert!
Further information:
http://www.iastate.edu

More articles from Life Sciences:

nachricht Hunting pathogens at full force
22.03.2017 | Helmholtz-Zentrum für Infektionsforschung

nachricht A 155 carat diamond with 92 mm diameter
22.03.2017 | Universität Augsburg

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Pulverizing electronic waste is green, clean -- and cold

22.03.2017 | Materials Sciences

Astronomers hazard a ride in a 'drifting carousel' to understand pulsating stars

22.03.2017 | Physics and Astronomy

New gel-like coating beefs up the performance of lithium-sulfur batteries

22.03.2017 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>